10-Q - MAIN - Equibles

Table of Contents

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q


(Mark One)
⌧	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended September 30, 2020
OR
◻	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from: to

Commission File Number: 001-33723

Main Street Capital Corporation

(Exact name of registrant as specified in its charter)


Maryland<br>(State or other jurisdiction of<br>incorporation or organization)	41-2230745<br>(I.R.S. Employer<br>Identification No.)
1300 Post Oak Boulevard, 8^th^Floor<br>Houston, TX<br>(Address of principal executive offices)	77056<br>(Zip Code)

(713) 350-6000

(Registrant’s telephone number including area code)

n/a

(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class	****	Trading Symbol	****	Name of Each Exchange on Which<br>Registered
Common Stock, par value $0.01 per share		MAIN		New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ⌧ No ◻

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ◻ No ◻

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.


Large accelerated filer ⌧	Accelerated filer ◻	Non-accelerated filer ◻	Smaller reporting company ◻<br>Emerging growth company ◻

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ◻

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ◻ No ⌧

The number of shares outstanding of the issuer’s common stock as of November 5, 2020 was 66,272,522.

Table of Contents TABLE OF CONTENTS


	PART I
	FINANCIAL INFORMATION
Item 1.	Consolidated Financial Statements
	Consolidated Balance Sheets—September 30, 2020 (unaudited) and December 31, 2019	1
	Consolidated Statements of Operations (unaudited)—Three and nine months ended September 30, 2020 and 2019	2
	Consolidated Statements of Changes in Net Assets (unaudited)—Nine months ended September 30, 2020 and 2019	3
	Consolidated Statements of Cash Flows (unaudited)—Nine months ended September 30, 2020 and 2019	4
	Consolidated Schedule of Investments (unaudited)—September 30, 2020	5
	Consolidated Schedule of Investments—December 31, 2019	28
	Notes to Consolidated Financial Statements (unaudited)	51
	Consolidated Schedules of Investments in and Advances to Affiliates (unaudited)—Nine months ended September 30, 2020 and 2019	85
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	95
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	115
Item 4.	Controls and Procedures	116
	PART II
	OTHER INFORMATION
Item 1.	Legal Proceedings	116
Item 1A.	Risk Factors	117
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	117
Item 5.	Other Information	117
Item 6.	Exhibits	118
	Signatures	119

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Balance Sheets

(dollars in thousands, except shares and per share amounts)


	September 30,		December 31,
	2020		2019
	(Unaudited)
ASSETS
Investments at fair value:
Control investments (cost: $801,453 and $778,367 as of September 30, 2020 and December 31, 2019, respectively)	$	1,020,713	$	1,032,721
Affiliate investments (cost: $396,054 and $351,764 as of September 30, 2020 and December 31, 2019, respectively)		348,030		330,287
Non‑Control/Non‑Affiliate investments (cost: $1,330,738 and $1,297,587 as of September 30, 2020 and December 31, 2019, respectively)		1,215,902		1,239,316
Total investments (cost: $2,528,245 and $2,427,718 as of September 30, 2020 and December 31, 2019, respectively)		2,584,645		2,602,324
Cash and cash equivalents		27,121		55,246
Interest receivable and other assets		42,758		50,458
Deferred financing costs (net of accumulated amortization of $8,225 and $7,501 as of September 30, 2020 and December 31, 2019, respectively)		2,944		3,521
Total assets	$	2,657,468	$	2,711,549
LIABILITIES
Credit facility	$	253,000	$	300,000
SBIC debentures (par: $304,800 ($40,000 due within one year) and $311,800 as of September 30, 2020 and December 31, 2019, respectively)		298,835		306,188
5.20% Notes due 2024 (par: $450,000 and $325,000 as of September 30, 2020 and December 31, 2019, respectively)		451,953		324,595
4.50% Notes due 2022 (par: $185,000 as of both September 30, 2020 and December 31, 2019)		183,685		183,229
Accounts payable and other liabilities		19,136		24,532
Interest payable		13,392		7,292
Dividend payable		13,554		13,174
Deferred tax liability, net		731		16,149
Total liabilities		1,234,286		1,175,159
Commitments and contingencies (Note K)
NET ASSETS
Common stock, $0.01 par value per share (150,000,000 shares authorized; 66,135,837 and 64,241,341 shares issued and outstanding as of September 30, 2020 and December 31, 2019, respectively)		661		643
Additional paid‑in capital		1,569,642		1,512,435
Total undistributed (overdistributed) earnings		(147,121)		23,312
Total net assets		1,423,182		1,536,390
Total liabilities and net assets	$	2,657,468	$	2,711,549
NET ASSET VALUE PER SHARE	$	21.52	$	23.91

The accompanying notes are an integral part of these consolidated financial statements

Table of Contents MAIN STREET CAPITAL CORPORATION

Consolidated Statements of Operations

(dollars in thousands, except shares and per share amounts)

(Unaudited)


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
INVESTMENT INCOME:
Interest, fee and dividend income:
Control investments	$	18,558	$	23,173	$	57,357	$	70,480
Affiliate investments		8,255		8,009		23,626		25,426
Non‑Control/Non‑Affiliate investments		25,141		28,886		79,126		86,818
Total investment income		51,954		60,068		160,109		182,724
EXPENSES:
Interest		(12,489)		(12,893)		(36,827)		(37,138)
Compensation		(4,980)		(4,322)		(12,280)		(15,907)
General and administrative		(3,354)		(2,920)		(9,827)		(9,282)
Share‑based compensation		(2,561)		(2,572)		(8,215)		(7,279)
Expenses allocated to the External Investment Manager		1,892		1,651		5,340		5,001
Total expenses		(21,492)		(21,056)		(61,809)		(64,605)
NET INVESTMENT INCOME		30,462		39,012		98,300		118,119
NET REALIZED GAIN (LOSS):
Control investments		4,041		5,869		(15,825)		4,926
Affiliate investments		(172)		1,850		(407)		(602)
Non‑Control/Non‑Affiliate investments		(17,743)		(13,595)		(28,091)		(18,487)
Realized loss on extinguishment of debt		—		—		(534)		(5,689)
Total net realized loss		(13,874)		(5,876)		(44,857)		(19,852)
NET UNREALIZED APPRECIATION (DEPRECIATION):
Control investments		7,139		(8,797)		(35,096)		6,286
Affiliate investments		2,406		1,323		(26,883)		3,131
Non‑Control/Non‑Affiliate investments		53,569		4,547		(56,051)		3,737
SBIC debentures		—		(319)		460		4,625
Total net unrealized appreciation (depreciation)		63,114		(3,246)		(117,570)		17,779
INCOME TAXES:
Federal and state income, excise and other taxes		(1,165)		(1,079)		(1,420)		(2,745)
Deferred taxes		(342)		5,091		15,673		254
Income tax benefit (provision)		(1,507)		4,012		14,253		(2,491)
NET INCREASE (DECREASE) IN NET ASSETS RESULTING FROM OPERATIONS	$	78,195	$	33,902	$	(49,874)	$	113,555
NET INVESTMENT INCOME PER SHARE—BASIC AND DILUTED	$	0.46	$	0.62	$	1.50	$	1.88
NET INCREASE (DECREASE) IN NET ASSETS RESULTING FROM OPERATIONS PER SHARE—BASIC AND DILUTED	$	1.18	$	0.54	$	(0.76)	$	1.81
WEIGHTED AVERAGE SHARES OUTSTANDING—BASIC AND DILUTED		66,110,555		63,297,943		65,319,784		62,686,139

The accompanying notes are an integral part of these consolidated financial statements

Table of Contents MAIN STREET CAPITAL CORPORATION

Consolidated Statements of Changes in Net Assets

(dollars in thousands, except shares)

(Unaudited)


						Total
	Common Stock			Additional		Undistributed
	Number of	Par		Paid ‑ In		(Overdistributed)		Total Net
	Shares	Value		Capital		Earnings		Asset Value
Balances at December 31, 2018	61,264,861	$	613	$	1,409,945	$	65,491	$	1,476,049
Public offering of common stock, net of offering costs	960,684		9		35,376		—		35,385
Share‑based compensation	—		—		2,329		—		2,329
Dividend reinvestment	96,189		1		3,595		—		3,596
Amortization of directors’ deferred compensation	—		—		216		—		216
Issuance of restricted stock	52,043		1		(1)		—		—
Dividends to stockholders	—		—		70		(36,549)		(36,479)
Net increase resulting from operations	—		—		—		41,401		41,401
Balances at March 31, 2019	62,373,777	$	624	$	1,451,530	$	70,343	$	1,522,497
Public offering of common stock, net of offering costs	245,989		2		9,416		—		9,418
Share‑based compensation	—		—		2,378		—		2,378
Purchase of vested stock for employee payroll tax withholding	(90,404)		(1)		(3,364)		—		(3,365)
Dividend reinvestment	133,128		1		5,392		—		5,393
Amortization of directors’ deferred compensation	—		—		216		—		216
Issuance of restricted stock, net of forfeited shares	262,642		3		(3)		—		—
Dividends to stockholders	—		—		114		(53,823)		(53,709)
Net increase resulting from operations	—		—		—		38,254		38,254
Balances at June 30, 2019	62,925,132	$	629	$	1,465,679	$	54,774	$	1,521,082
Public offering of common stock, net of offering costs	225,864		2		9,398		—		9,400
Share‑based compensation	—		—		2,572		—		2,572
Dividend reinvestment	88,052		1		3,747		—		3,748
Amortization of directors’ deferred compensation	—		—		217		—		217
Issuance of restricted stock, net of forfeited shares	75,465		1		(1)		—		—
Dividends to stockholders	—		—		90		(38,956)		(38,866)
Net increase resulting from operations	—		—		—		33,902		33,902
Balances at September 30, 2019	63,314,513	$	633	$	1,481,702	$	49,720	$	1,532,055
Balances at December 31, 2019	64,252,937	$	643	$	1,512,435	$	23,312	$	1,536,390
Public offering of common stock, net of offering costs	91,458		1		3,854		—		3,855
Share‑based compensation	—		—		2,837		—		2,837
Purchase of vested stock for employee payroll tax withholding	(851)		—		(29)		—		(29)
Dividend reinvestment	108,722		1		3,929		—		3,930
Amortization of directors’ deferred compensation	—		—		238		—		238
Issuance of restricted stock, net of forfeited shares	10,383		—		—		—		—
Dividends to stockholders	—		—		93		(39,706)		(39,613)
Net decrease resulting from operations	—		—		—		(171,438)		(171,438)
Balances at March 31, 2020	64,462,649	$	645	$	1,523,357	$	(187,832)	$	1,336,170
Public offering of common stock, net of offering costs	824,968		9		26,007		—		26,016
Share‑based compensation	—		—		2,817		—		2,817
Purchase of vested stock for employee payroll tax withholding	(84,094)		(1)		(1,730)		—		(1,731)
Dividend reinvestment	146,229		1		4,158		—		4,159
Amortization of directors’ deferred compensation	—		—		224		—		224
Issuance of restricted stock, net of forfeited shares	414,053		4		(4)		—		—
Dividends to stockholders	—		—		99		(40,179)		(40,080)
Net increase resulting from operations	—		—		—		43,369		43,369
Balances at June 30, 2020	65,763,805	$	658	$	1,554,928	$	(184,642)	$	1,370,944
Public offering of common stock, net of offering costs	250,949		2		7,741		—		7,743
Share‑based compensation	—		—		2,561		—		2,561
Purchase of vested stock for employee payroll tax withholding	(1,998)		—		(7)		—		(7)
Dividend reinvestment	132,583		1		4,129		—		4,130
Amortization of directors’ deferred compensation	—		—		195		—		195
Issuance of restricted stock, net of forfeited shares	(6,899)		—		—		—		—
Dividends to stockholders	—		—		95		(40,674)		(40,579)
Net increase resulting from operations	—		—		—		78,195		78,195
Balances at September 30, 2020	66,138,440	$	661	$	1,569,642	$	(147,121)	$	1,423,182

The accompanying notes are an integral part of these consolidated financial statements

Table of Contents MAIN STREET CAPITAL CORPORATION

Consolidated Statements of Cash Flows

(dollars in thousands)


	Nine Months Ended
	September 30,
	2020		2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net increase (decrease) in net assets resulting from operations	$	(49,874)	$	113,555
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Investments in portfolio companies		(414,574)		(477,257)
Proceeds from sales and repayments of debt investments in portfolio companies		255,147		331,204
Proceeds from sales and return of capital of equity investments in portfolio companies		21,210		32,380
Net unrealized (appreciation) depreciation		117,570		(17,779)
Net realized loss		44,857		19,852
Accretion of unearned income		(8,239)		(9,131)
Payment-in-kind interest		(3,816)		(3,482)
Cumulative dividends		(1,404)		(1,975)
Share-based compensation expense		8,215		7,279
Amortization of deferred financing costs		1,986		2,822
Deferred tax benefit		(15,673)		(254)
Changes in other assets and liabilities:
Interest receivable and other assets		12,661		(9,073)
Interest payable		6,100		6,499
Accounts payable and other liabilities		(4,739)		5,759
Deferred fees and other		2,296		1,495
Net cash provided by (used in) operating activities		(28,277)		1,894

CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from public offering of common stock, net of offering costs		37,614		54,203
Proceeds from public offering of 5.20% Notes due 2024		125,000		250,000
Dividends paid		(107,673)		(115,288)
Proceeds from issuance of SBIC debentures		35,000		-
Repayments of SBIC debentures		(42,000)		(34,000)
Proceeds from credit facility		292,000		310,000
Repayments on credit facility		(339,000)		(461,000)
Debt issuance premiums (costs), net		978		(4,344)
Purchases of vested stock for employee payroll tax withholding		(1,767)		(3,365)
Net cash provided by (used in) financing activities		152		(3,794)

Net decrease in cash and cash equivalents		(28,125)		(1,900)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD		55,246		54,181
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	27,121	$	52,281

Supplemental cash flow disclosures:
Interest paid	$	28,646	$	27,725
Taxes paid	$	2,439	$	2,265
Operating non-cash activities:
Right-of-use assets obtained in exchange for operating lease liabilities	$	-	$	5,240
Non-cash financing activities:
Shares issued pursuant to the DRIP	$	12,219	$	12,737

The accompanying notes are an integral part of these consolidated financial statements

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)
Control Investments (5)

Access Media Holdings, LLC (10)	July 22, 2015	Private Cable Operator
			10.00% PIK Secured Debt (Maturity - July 22, 2020) (14) (17) (19)	$	23,828	$	23,828	$	3,937
			Preferred Member Units (9,481,500 units) (24)				9,375		(284)
			Member Units (45 units)				1		-
							33,204		3,653

ASC Interests, LLC	August 1, 2013	Recreational and Educational Shooting Facility
			13.00% Secured Debt (Maturity - July 31, 2022)		1,650		1,611		1,611
			Member Units (1,500 units)				1,500		1,050
							3,111		2,661

Analytical Systems Keco, LLC	August 16, 2019	Manufacturer of Liquid and Gas Analyzers
			LIBOR Plus 10.00% (Floor 2.00%), Current Coupon <br>12.00%, Secured Debt (Maturity - August 16, 2024) (9)		5,225		4,925		4,925
			Preferred Member Units (3,200 units)				3,200		3,200
			Warrants (420 equivalent shares; Expiration - August <br>16, 2029; Strike price - $0.01 per share)				316		350
							8,441		8,475

ATS Workholding, LLC (10)	March 10, 2014	Manufacturer of Machine Cutting Tools and Accessories
			5% Secured Debt (Maturity - November 16, 2021)		4,940		4,781		3,407
			Preferred Member Units (3,725,862 units)				3,726		-
							8,507		3,407

Bond-Coat, Inc.	December 28, 2012	Casing and Tubing Coating Services
			Common Stock (57,508 shares)				6,350		3,310

Brewer Crane Holdings, LLC	January 9, 2018	Provider of Crane Rental and Operating Services
			LIBOR Plus 10.00% (Floor 1.00%), Current Coupon <br>11.00%, Secured Debt (Maturity - January 9, 2023) (9)		8,680		8,632		8,632
			Preferred Member Units (2,950 units) (8)				4,280		5,610
							12,912		14,242

Bridge Capital Solutions Corporation	April 18, 2012	Financial Services and Cash Flow Solutions Provider
			13.00% Secured Debt (Maturity - December 11, 2024)		8,813		8,240		8,240
			Warrants (82 equivalent shares; Expiration - July <br>25, 2026; Strike price - $0.01 per share)				2,132		3,000
			13.00% Secured Debt (Mercury Service Group, LLC)<br>(Maturity - December 11, 2024)		1,000		998		998
			Preferred Member Units (Mercury Service Group, LLC)<br>(17,742 units) (8)				1,000		1,000
							12,370		13,238

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Café Brazil, LLC	April 20, 2004	Casual Restaurant Group
			Member Units (1,233 units) (8)				1,742		2,030

California Splendor Holdings LLC	March 30, 2018	Processor of Frozen Fruits
			LIBOR Plus 8.00% (Floor 1.00%), Current Coupon 9.00%,<br>Secured Debt (Maturity - March 30, 2023) (9)		19,600		19,504		19,464
			LIBOR Plus 10.00% (Floor 1.00%), Current Coupon 11.00%,<br>Secured Debt (Maturity - March 30, 2023) (9)		28,000		27,840		27,775
			Preferred Member Units (6,725 units) (8)				7,980		7,980
			Preferred Member Units (6,157 units) (8)				10,775		6,241
							66,099		61,460

CBT Nuggets, LLC ("CBT")	June 1, 2006	Produces and Sells IT Training Certification Videos
			Member Units (416 units) (8)				1,300		45,730

Centre Technologies Holdings, LLC	January 4, 2019	Provider of IT Hardware Services and Software Solutions
			LIBOR Plus 10.00% (Floor 2.00%), Current Coupon 12.00%,<br>Secured Debt (Maturity - January 4, 2024) (9)		11,781		11,696		11,696
			Preferred Member Units (12,696 units)				5,840		6,060
							17,536		17,756

Chamberlin Holding LLC	February 26, 2018	Roofing and Waterproofing Specialty Contractor
			LIBOR Plus 10.00% (Floor 1.00%), Current Coupon 11.00%,<br>Secured Debt (Maturity - February 26, 2023) (9)		15,973		15,884		15,973
			Member Units (4,347 units) (8)				11,440		28,000
			Member Units (Chamberlin Langfield Real Estate, LLC)<br>(1,047,146 units) (8)				1,047		920
							28,371		44,893

Charps, LLC	February 3, 2017	Pipeline Maintenance and Construction
			8.67% Current / 1.33% PIK, Current Coupon plus PIK 10.00% (Maturity - January 31, 2024) (19)		9,792		7,910		8,507
			15.00% Secured Debt (Maturity - June 5, 2022)		1,846		1,846		1,846
			Preferred Member Units (1,600 units) (8)				400		9,400
							10,156		19,753

Clad-Rex Steel, LLC	December 20, 2016	Specialty Manufacturer of Vinyl-Clad Metal
			LIBOR Plus 9.50% (Floor 1.00%), Current Coupon 10.50%,<br>Secured Debt (Maturity - December 20, 2021) (9)		10,880		10,847		10,847
			Member Units (717 units) (8)				7,280		8,610
			10.00% Secured Debt (Clad-Rex Steel RE Investor, LLC)<br>(Maturity - December 20, 2036)		1,117		1,107		1,107
			Member Units (Clad-Rex Steel RE Investor, LLC)<br>(800 units)				210		460
							19,444		21,024

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

CMS Minerals Investments	January 30, 2015	Oil & Gas Exploration & Production
			Member Units (CMS Minerals II, LLC) (100 units)				2,252		1,697

Cody Pools, Inc.	March 6, 2020	Designer of Residential and Commercial Pools
			LIBOR Plus 10.50% (Floor 1.75%), Current Coupon 12.25%,<br>Secured Debt (Maturity - March 6, 2025) (9)		15,600		15,457		15,600
			Preferred Member Units (587 units)				8,317		11,840
							23,774		27,440

CompareNetworks Topco, LLC	January 29, 2019	Internet Publishing and Web Search Portals
			LIBOR Plus 11.00% (Floor 1.00%), Current Coupon 12.00%,<br>Secured Debt (Maturity - January 29, 2024) (9)		9,454		9,397		9,397
			Preferred Member Units (1,975 units)				1,975		5,360
							11,372		14,757

Copper Trail Fund Investments (12) (13)	July 17, 2017	Investment Partnership
			LP Interests (CTMH, LP) (Fully diluted 38.80%)				747		747

Datacom, LLC	May 30, 2014	Technology and Telecommunications Provider
			8.00% Secured Debt (Maturity - May 31, 2021) (14)		1,800		1,800		1,615
			10.50% PIK Secured Debt (Maturity - May 31, 2021) (14) (19)		12,507		12,475		10,142
			Class A Preferred Member Units				1,294		-
			Class B Preferred Member Units (6,453 units)				6,030		-
							21,599		11,757

Digital Products Holdings LLC	April 1, 2018	Designer and Distributor of Consumer Electronics
			LIBOR Plus 10.00% (Floor 1.00%), Current Coupon 11.00%,<br>Secured Debt (Maturity - April 1, 2023) (9)		18,503		18,396		18,013
			Preferred Member Units (3,857 shares) (8)				9,501		6,908
							27,897		24,921

Direct Marketing Solutions, Inc.	February 13, 2018	Provider of Omni-Channel Direct Marketing Services
			LIBOR Plus 11.00% (Floor 1.00%), Current Coupon <br>12.00%, Secured Debt (Maturity - February 13, 2023) (9)		15,090		14,998		15,090
			Preferred Stock (8,400 shares)				8,400		20,060
							23,398		35,150

Gamber-Johnson Holdings, LLC ("GJH")	June 24, 2016	Manufacturer of Ruggedized Computer Mounting Systems
			LIBOR Plus 6.50% (Floor 2.00%), Current Coupon 8.50%,<br>Secured Debt (Maturity - June 24, 2021) (9)		19,838		19,792		19,838
			Member Units (8,619 units) (8)				14,844		53,240
							34,636		73,078

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Garreco, LLC	July 15, 2013	Manufacturer and Supplier of Dental Products
			LIBOR Plus 8.00% (Floor 1.00%, Ceiling 1.50%), Current <br>Coupon 9.00%, Secured Debt (Maturity - January 31, 2021) (9)		4,519		4,519		4,519
			Member Units (1,200 units)				1,200		1,700
							5,719		6,219

GRT Rubber Technologies LLC ("GRT")	December 19, 2014	Manufacturer of Engineered Rubber Products
			LIBOR Plus 7.00%, Current Coupon 7.16%,<br>Secured Debt (Maturity - December 31, 2023)		16,775		16,775		16,775
			Member Units (5,879 units) (8)				13,065		45,430
							29,840		62,205

Gulf Manufacturing, LLC	August 31, 2007	Manufacturer of Specialty Fabricated Industrial Piping Products
			Member Units (438 units) (8)				2,980		4,400

Gulf Publishing Holdings, LLC	April 29, 2016	Energy Industry Focused Media and Publishing
			LIBOR Plus 9.50% (Floor 1.00%), Current Coupon 5.25% / <br> 5.25% PIK, Current Coupon Plus PIK 10.50%, Secured <br>Debt (Maturity - September 30, 2020) (9) (17) (19)		247		247		247
			6.25% Current / 6.25% PIK Secured Debt (Maturity - <br>April 29, 2021) (19)		12,939		12,919		11,828
			Member Units (3,681 units)				3,681		-
							16,847		12,075

Harborside Holdings, LLC	March 20, 2017	Real Estate Holding Company
			Member units (100 units)				6,606		5,020

Harris Preston Fund Investments (12) (13)	October 1, 2017	Investment Partnership
			LP Interests (2717 MH, L.P.) (Fully diluted 49.30%)				2,735		3,277

Harrison Hydra-Gen, Ltd.	June 4, 2010	Manufacturer of Hydraulic Generators
			Common Stock (107,456 shares) (8)				718		5,640

Jensen Jewelers of Idaho, LLC	November 14, 2006	Retail Jewelry Store
			Prime Plus 6.75% (Floor 2.00%), Current Coupon <br>10.00%, Secured Debt (Maturity - November 14,<br>2023) (9)		3,700		3,669		3,654
			Member Units (627 units) (8)				811		7,270
							4,480		10,924

J&J Services, Inc.	October 31, 2019	Provider of Dumpster and Portable Toilet Rental Services
			11.50% Secured Debt (Maturity - October 31, 2024)		14,400		14,278		14,400
			Preferred Stock (2,814 shares)				7,085		11,920
							21,363		26,320

KBK Industries, LLC	January 23, 2006	Manufacturer of Specialty Oilfield and Industrial Products
			Member Units (325 units) (8)				783		13,140

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Kickhaefer Manufacturing Company, LLC	October 31, 2018	Precision Metal Parts Manufacturing
			9.50% Current / 2.00% PIK Secured Debt (Maturity - <br>October 31, 2023) (19)		23,615		23,449		23,449
			Member Units (581 units)				12,240		12,150
			9.00% Secured Debt (Maturity - October 31, 2048)		3,956		3,917		3,917
			Member Units (KMC RE Investor, LLC) (800 units) (8)				992		1,160
							40,598		40,676

Market Force Information, LLC	July 28, 2017	Provider of Customer Experience Management Services
			LIBOR Plus 11.00% (Floor 1.00%), Current Coupon <br>12.00% Secured Debt (Maturity - July 28, 2023) (9) (14)		900		900		900
			12.00% PIK Secured Debt (Maturity - July 28, 2023) (14) (19)		26,079		25,952		13,712
			Member Units (743,921 units)				16,642		-
							43,494		14,612

MH Corbin Holding LLC	August 31, 2015	Manufacturer and Distributor of Traffic Safety Products
			13.00% Secured Debt (Maturity - March 31, 2022)		8,650		8,599		8,598
			Preferred Member Units (66,000 shares)				4,400		2,960
			Preferred Member Units (4,000 shares)				6,000		-
							18,999		11,558

Mid-Columbia Lumber Products, LLC	December 18, 2006	Manufacturer of Finger-Jointed Lumber Products
			Member Units (7,874 units)				4,239		-
			Member Units (Mid-Columbia Real Estate, LLC)<br>(500 units) (8)				1,499		1,390
							5,738		1,390

MSC Adviser I, LLC (16)	November 22, 2013	Third Party Investment<br>Advisory Services
			Member Units (Fully diluted 100.00%) (8)				-		71,080

Mystic Logistics Holdings, LLC	August 18, 2014	Logistics and Distribution Services Provider for Large Volume Mailers
			12.00% Secured Debt (Maturity - January 17, 2022)		6,733		6,721		6,721
			Common Stock (5,873 shares)				2,720		10,170
							9,441		16,891

NAPCO Precast, LLC	January 31, 2008	Precast Concrete Manufacturing
			Member Units (2,955 units) (8)				2,975		12,480

NexRev LLC	February 28, 2018	Provider of Energy Efficiency Products & Services
			11.00% Secured Debt (Maturity - February 28, 2023)		17,315		17,224		16,628
			Preferred Member Units (86,400,000 units)				6,880		950
							24,104		17,578

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

NRI Clinical Research, LLC	September 8, 2011	Clinical Research Service Provider
			10.50% Secured Debt (Maturity - June 8, 2022)		6,120		6,060		6,120
			Warrants (251,723 equivalent units; Expiration - <br>June 8, 2027; Strike price - $0.01 per unit)				252		1,390
			Member Units (1,454,167 units) (8)				765		5,321
							7,077		12,831

NRP Jones, LLC	December 22, 2011	Manufacturer of Hoses, Fittings and Assemblies
			12.00% Secured Debt (Maturity - March 20, 2023)		6,376		6,376		6,376
			Member Units (65,962 units) (8)				3,717		3,310
							10,093		9,686

NuStep, LLC	January 31, 2017	Designer, Manufacturer and Distributor of Fitness Equipment
			12.00% Secured Debt (Maturity - January 31, 2022)		19,640		19,575		19,575
			Preferred Member Units (406 units)				10,200		10,200
							29,775		29,775

OMi Holdings, Inc.	April 1, 2008	Manufacturer of Overhead Cranes
			Common Stock (1,500 shares) (8)				1,080		19,430

Pearl Meyer Topco LLC	April 27, 2020	Provider of Executive Compensation Consulting Services
			12.00% Secured Debt (Maturity - April 27, 2025)		35,000		34,676		34,676
			Member Units (13,800 units) (8)				13,000		13,000
							47,676		47,676

Pegasus Research Group, LLC	January 6, 2011	Provider of Telemarketing and Data Services
			Member Units (460 units) (8)				1,290		9,700

PPL RVs, Inc.	June 10, 2010	Recreational Vehicle Dealer
			LIBOR Plus 8.75% (Floor 0.50%), Current Coupon <br>9.25% Secured Debt (Maturity - November 15, 2022) (9)		11,855		11,768		11,768
			Common Stock (1,962 shares)				2,150		11,140
							13,918		22,908

Principle Environmental, LLC (d/b/a TruHorizon Environmental Solutions)	February 1, 2011	Noise Abatement Service Provider
			13.00% Secured Debt (Maturity - April 30, 2023)		6,397		6,329		6,397
			Preferred Member Units (19,631 units) (8)				4,600		11,230
			Warrants (1,018 equivalent units; Expiration - January <br>31, 2021; Strike price - $0.01 per unit)				1,200		930
							12,129		18,557

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Quality Lease Service, LLC	June 8, 2015	Provider of Rigsite Accommodation Unit Rentals and Related Services
			Member Units (1,000 units)				11,313		4,710

River Aggregates, LLC	March 30, 2011	Processor of Construction Aggregates
			Member Units (RA Properties, LLC) (1,500 units)				369		3,390

Tedder Industries, LLC	August 31, 2018	Manufacturer of Firearm Holsters and Accessories
			12.00% Secured Debt (Maturity - August 31, 2023)		17,040		16,934		16,934
			Preferred Member Units (479 units)				8,136		8,136
							25,070		25,070

Trantech Radiator Topco, LLC	May 31, 2019	Transformer Cooling Products and Services
			12.00% Secured Debt (Maturity - May 31, 2024)		8,720		8,639		8,708
			Common Stock (615 shares) (8)				4,655		7,769
							13,294		16,477

UnionRock Energy Fund II, LP(12) (13)	June 15, 2020	Oil & Gas Exploration & Production
			LP Interests (Fully diluted 49.60%)				2,894		2,894

Vision Interests, Inc.	June 5, 2007	Manufacturer / Installer of Commercial Signage
			13.00% Secured Debt (Maturity - September 30 2019) (17)		2,028		2,028		2,028
			Series A Preferred Stock (3,000,000 shares)				3,000		3,459
							5,028		5,487

Ziegler's NYPD, LLC	October 1, 2008	Casual Restaurant Group
			6.50% Secured Debt (Maturity - October 1, 2022)		1,000		1,000		979
			12.00% Secured Debt (Maturity - October 1, 2022)		625		625		625
			14.00% Secured Debt (Maturity - October 1, 2022)		2,750		2,750		2,715
			Warrants (587 equivalent units; Expiration - <br>October 1, 2025; Strike price - $0.01 per unit)				600		-
			Preferred Member Units (10,072 units)				2,834		1,139
							7,809		5,458
Subtotal Control Investments (71.6% of net assets at fair value)						$	801,453	$	1,020,713
****
Affiliate Investments (6)
****
AFG Capital Group, LLC	November 7, 2014	Provider of Rent-to-Own Financing Solutions and Services
			10.00% Secured Debt (Maturity - May 25, 2022)		578		578		578
			Preferred Member Units (186 units)				1,200		5,360
							1,778		5,938

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

American Trailer Rental Group LLC	June 7, 2017	Provider of Short-term Trailer and Container Rental
			Member Units (Milton Meisler Holdings LLC) <br>(73,493 units)				8,596		13,550

BBB Tank Services, LLC	April 8, 2016	Maintenance, Repair and Construction Services to the Above-Ground Storage Tank Market
			LIBOR Plus 11.00% (Floor 1.00%), Current Coupon 12.00%, (Maturity - April 8, 2021) (9)		4,800		4,753		4,702
			Preferred Stock (non-voting, 15.00% cumulative) (8)				146		146
			Member Units (800,000 units)				800		210
							5,699		5,058

Boccella Precast Products LLC	June 30, 2017	Manufacturer of Precast Hollow Core Concrete
			Member Units (2,160,000 units) (8)				2,256		5,600

Buca C, LLC	June 30, 2015	Casual Restaurant Group
			LIBOR Plus 9.25% (Floor 1.00%), Current Coupon<br>10.25%, Secured Debt (Maturity - June 30, 2020) (9) (17)		19,004		19,004		17,491
			Preferred Member Units (6 units; 6.00% cumulative) (8) (19)				4,770		765
							23,774		18,256

CAI Software LLC	October 10, 2014	Provider of Specialized Enterprise Resource Planning Software
			12.50% Secured Debt (Maturity - December 7, 2023)		26,607		26,439		26,607
			Member Units (70,764 units) (8)				1,102		5,930
							27,541		32,537

Chandler Signs Holdings, LLC (10)	January 4, 2016	Sign Manufacturer
			Class A Units (1,500,000 units)				1,500		2,050

Charlotte Russe, Inc (11)	May 28, 2013	Fast-Fashion Retailer to Young Women
			Common Stock (19,041 shares)				3,141		-

Classic H&G Holdings, LLC	March 12, 2020	Provider of Engineered Packaging Solutions
			12.00% Secured Debt (Maturity - March 12, 2025)		24,800		24,573		24,800
			Preferred Member Units (154 units) (8)				5,760		8,550
							30,333		33,350

Congruent Credit Opportunities Funds (12) (13)	January 24, 2012	Investment Partnership
			LP Interests (Congruent Credit Opportunities Fund <br>II, LP) (Fully diluted 19.80%)				5,210		855
			LP Interests (Congruent Credit Opportunities Fund <br>III, LP) (Fully diluted 17.40%) (8)				12,181		12,096
							17,391		12,951

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Copper Trail Fund Investments (12) (13)	July 17, 2017	Investment Partnership
			LP Interests (Copper Trail Energy Fund I, LP) (Fully <br>diluted 12.40%) (8)				2,161		1,854

Dos Rios Partners (12) (13) ****	April 25, 2013	Investment Partnership
			LP Interests (Dos Rios Partners, LP) (Fully diluted<br>20.20%)				6,605		7,033
			LP Interests (Dos Rios Partners - A, LP) (Fully diluted<br>6.40%)				2,097		2,233
							8,702		9,266

East Teak Fine Hardwoods, Inc.	April 13, 2006	Distributor of Hardwood Products
			Common Stock (6,250 shares)				480		300

EIG Fund Investments (12) (13)	November 6, 2015	Investment Partnership
			LP Interests (EIG Global Private Debt Fund-A, L.P.)<br>(Fully diluted 11.10%) (8)				739		526

Freeport Financial Funds (12) (13)	June 13, 2013	Investment Partnership
			LP Interests (Freeport Financial SBIC Fund LP)<br>(Fully diluted 9.30%)				5,974		5,081
			LP Interests (Freeport First Lien Loan Fund III LP)<br>(Fully diluted 6.00%) (8)				10,785		10,321
							16,759		15,402

Harris Preston Fund Investments (12) (13)	August 9, 2017	Investment Partnership
			LP Interests (HPEP 3, L.P.) (Fully diluted 8.20%)				3,071		3,071

Hawk Ridge Systems, LLC (13)	December 2, 2016	Value-Added Reseller of Engineering Design and Manufacturing Solutions
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.00%,<br>Secured Debt (Maturity - December 2, 2021) (9)		984		984		984
			11.00% Secured Debt (Maturity - December 2, 2021)		16,400		16,358		16,400
			Preferred Member Units (226 units) (8)				2,850		8,030
			Preferred Member Units (HRS Services, ULC)<br>(226 units)				150		420
							20,342		25,834

Houston Plating and Coatings, LLC	January 8, 2003	Provider of Plating and Industrial Coating Services
			8.00% Unsecured Convertible Debt (Maturity - <br>May 1, 2022)		3,000		3,000		3,000
			Member Units (322,297 units) (8)				2,352		6,060
							5,352		9,060

I-45 SLF LLC (12) (13)	October 20, 2015	Investment Partnership
			Member Units (Fully diluted 20.0%; 24.40% profits<br>interest) (8)				20,200		15,392

L.F. Manufacturing Holdings, LLC (10)	December 23, 2013	Manufacturer of Fiberglass Products
			Preferred Member Units (non-voting; 14% cumulative) (8) (19)				90		90
			Member Units (2,179,001 units)				2,019		2,050
							2,109		2,140

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

OnAsset Intelligence, Inc.	April 18, 2011	Provider of Transportation Monitoring / Tracking Products and Services
			12.00% PIK Secured Debt (Maturity - June 30, 2021) (19)		7,084		7,084		7,084
			10.00% PIK Unsecured Debt (Maturity - June 30, 2021) (19)		63		63		63
			Preferred Stock (912 shares)				1,981		-
			Warrants (5,333 equivalent shares; Expiration - <br>April 18, 2021; Strike price - $0.01 per share)				1,919		-
							11,047		7,147

PCI Holding Company, Inc.	December 18, 2012	Manufacturer of Industrial Gas Generating Systems
			12.00% Secured Debt (Maturity - July 1, 2020) (17)		11,356		11,356		11,356
			Preferred Stock (1,740,000 shares) (non-voting)				1,740		4,350
			Preferred Stock (1,500,000 shares)				3,927		4,430
							17,023		20,136

Rocaceia, LLC (Quality Lease and Rental Holdings, LLC)	January 8, 2013	Provider of Rigsite Accommodation Unit Rentals and Related Services
			12.00% Secured Debt (Maturity - January 8, 2018) (14) (15)		30,369		29,865		-
			Preferred Member Units (250 units)				2,500		-
							32,365		-

Salado Stone Holdings, LLC (10)	June 27, 2016	Limestone and Sandstone Dimension Cut Stone Mining Quarries
			Class A Preferred Units (Salado Acquisition, LLC) <br>(2,000,000 units)				2,000		770

Slick Innovations, LLC	September 13, 2018	Text Message Marketing Platform
			14.00% Secured Debt (Maturity - September 13, 2023)		6,080		5,949		6,080
			Common Stock (70,000 shares) (8)				700		1,250
			Warrants (18,084 equivalent units; Expiration -<br>September 13, 2028; Strike price - $0.01 per unit)				181		330
							6,830		7,660

SI East, LLC	August 31, 2018	Rigid Industrial Packaging Manufacturing
			9.50% Secured Debt (Maturity - August 31, 2023)		32,963		32,742		32,962
			Preferred Member Units (157 units) (8)				6,000		9,720
							38,742		42,682

Superior Rigging & Erecting Co.	August 31, 2020	Provider of Steel Erection, Crane Rental & Rigging Services
			12.00% Secured Debt (Maturity - August 31, 2025)		21,500		21,290		21,290
			Preferred Member Units (1,473 units)				4,500		4,500
							25,790		25,790

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

UniTek Global Services, Inc. (11)	April 15, 2011	Provider of Outsourced Infrastructure Services
			LIBOR Plus 6.50% (Floor 1.00%), Current Coupon 7.50%, <br>Secured Debt (Maturity - August 20, 2024) (9)		2,955		2,932		2,671
			Preferred Stock (1,133,102 shares; 20% cumulative) (8) (19)				1,371		2,833
			Preferred Stock (1,521,122 shares; 20% cumulative) (8) (19)				2,188		1,723
			Preferred Stock (2,281,682 shares; 19% cumulative) (8) (19)				3,667		-
			Preferred Stock (4,336,866 shares; 13.50% cumulative) (19)				7,924		-
			Common Stock (945,507 shares)				-		-
							18,082		7,227

Universal Wellhead Services Holdings, LLC (10)	October 30, 2014	Provider of Wellhead Equipment, Designs, and Personnel to the Oil & Gas Industry
			Preferred Member Units (UWS Investments, LLC)<br>(716,949 units; 14% cumulative) (19)				1,032		-
			Member Units (UWS Investments, LLC) (4,000,000 units)				4,000		-
							5,032		-

Volusion, LLC	January 26, 2015	Provider of Online Software-as-a-Service eCommerce Solutions
			11.50% Secured Debt (Maturity - January 26, 2020) (17)		20,234		20,234		19,243
			8.00% Unsecured Convertible Debt (Maturity - <br>November 16, 2023)		409		409		290
			Preferred Member Units (4,876,670 units)				14,000		4,950
			Warrants (1,831,355 equivalent units; Expiration -<br>January 26, 2025; Strike price - $0.01 per unit)				2,576		-
							37,219		24,483
Subtotal Affiliate Investments (24.4% of net assets at fair value)						$	396,054	$	348,030
****
Non-Control/Non-Affiliate Investments (7)
****
AAC Holdings, Inc. (11)	June 30, 2017	Substance Abuse Treatment Service Provider
			10.00% Current / 8.00% PIK Secured Debt (Maturity - <br>March 24, 2021) (19)		5,646		5,551		5,551
			Prime Plus 10.00% (Floor 1.00%), Current Coupon 13.25%, <br>Secured Debt (Maturity - April 17, 2020) (9) (17)		3,121		2,961		2,887
			Prime Plus 9.75% (Floor 1.00%), Current Coupon 13.00%,<br>Secured Debt (Maturity - June 30, 2023) (9) (14)		14,396		14,030		6,430
							22,542		14,868

Adams Publishing Group, LLC (10)	November 19, 2015	Local Newspaper Operator
			LIBOR Plus 7.00% (Floor 1.75%), Current Coupon 8.75%, <br>Secured Debt (Maturity - July 3, 2023) (9)		6,082		5,951		5,937

ADS Tactical, Inc. (10)	March 7, 2017	Value-Added Logistics and Supply Chain Provider to the Defense Industry
			LIBOR Plus 6.25% (Floor 0.75%), Current Coupon 7.00%,<br>Secured Debt (Maturity - July 26, 2023) (9)		19,685		19,572		19,685

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Aethon United BR LP (10)	September 8, 2017	Oil & Gas Exploration & Production
			LIBOR Plus 6.75% (Floor 1.00%), Current Coupon 7.75%, <br>Secured Debt (Maturity - September 8, 2023) (9)		9,750		9,651		9,298

Affordable Care Holding Corp. (10)	May 9, 2019	Dental Support Organization
			LIBOR Plus 4.75% (Floor 1.00%), Current Coupon 5.75%, <br>Secured Debt (Maturity - October 22, 2022) (9)		14,284		14,081		13,212

ALKU, LLC. (11)	October 18, 2019	Specialty National Staffing Operator
			LIBOR Plus 5.50%, Current Coupon 5.81%, <br>Secured Debt (Maturity - July 29, 2026) (9)		9,950		9,861		9,900

American Nuts, LLC (10)	April 10, 2018	Roaster, Mixer and Packager of Bulk Nuts and Seeds
			LIBOR Plus 8.00% (Floor 1.00%), Current Coupon 9.00%, <br>Secured Debt (Maturity - April 10, 2023) (9)		12,158		11,965		11,889

American Teleconferencing Services, Ltd. (11)	May 19, 2016	Provider of Audio Conferencing and Video Collaboration Solutions
			LIBOR Plus 6.50% (Floor 1.00%), Current Coupon 7.50%, <br>Secured Debt (Maturity - June 8, 2023) (9)		17,374		16,590		11,597

APTIM Corp. (11)	August 17, 2018	Engineering, Construction & Procurement
			7.75% Secured Debt (Maturity - June 15, 2025)		12,452		11,004		6,475

Arcus Hunting LLC (10)	January 6, 2015	Manufacturer of Bowhunting and Archery Products and Accessories
			LIBOR Plus 10.00% (Floor 1.00%), Current Coupon 11.00%, <br>Secured Debt (Maturity - March 31, 2021) (9)		13,659		13,659		13,659

ASC Ortho Management Company, LLC (10)	August 31, 2018	Provider of Orthopedic Services
			LIBOR Plus 7.50% (Floor 1.00%), Current Coupon 8.50%, <br>Secured Debt (Maturity - August 31, 2023) (9)		5,235		5,171		5,051
			13.25% PIK Secured Debt (Maturity - December 1, 2023) (19)		2,047		2,020		2,045
							7,191		7,096

ATX Networks Corp. (11) (13) (21)	June 30, 2015	Provider of Radio Frequency Management Equipment
			LIBOR Plus 6.25% (Floor 1.00%), Current Coupon 7.25% /<br> 1.50% PIK, Current Coupon Plus PIK 8.75%, <br>Secured Debt (Maturity - December 31, 2023) (9) (19)		13,612		13,521		12,455

Barfly Ventures, LLC (10)	August 31, 2015	Casual Restaurant Group
			9.00% PIK Secured Debt (Maturity - March 23, 2021) (14) (19)		110		110		110
			12.00% Secured Debt (Maturity - August 31, 2020) (14) (17)		10,185		10,073		1,111
			Options (3 equivalent units)				607		-
			Warrant (2 equivalent unit; Expiration - August 31,<br>2025; Strike price - $1.00 per unit)				473		-
							11,263		1,221

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Berry Aviation, Inc. (10)	July 6, 2018	Charter Airline Services
			10.50% Current / 1.5% PIK, Secured Debt (Maturity - <br>January 6, 2024) (19)		4,606		4,575		4,606
			Preferred Member Units (Berry Acquisition, LLC) <br>(122,416 units; 16% cumulative) (8) (19)				140		140
			Preferred Member Units (Berry Acquisition, LLC) <br>(1,548,387 units; 8% cumulative) (19)				1,671		804
							6,386		5,550

BigName Commerce, LLC (10)	May 11, 2017	Provider of Envelopes and Complimentary Stationery Products
			LIBOR Plus 7.25% (Floor 1.00%), Current Coupon 8.25% <br>Secured Debt (Maturity - May 11, 2022) (9)		2,091		2,082		1,995

Binswanger Enterprises, LLC (10)	March 10, 2017	Glass Repair and Installation Service Provider
			LIBOR Plus 8.50% (Floor 1.00%), Current Coupon 9.50%,<br>Secured Debt (Maturity - March 9, 2022) (9)		13,345		13,152		13,345
			Member Units (1,050,000 units)				1,050		670
							14,202		14,015

BLST Operating Company, LLC. (11)	December 19, 2013	Multi-Channel Retailer of General Merchandise
			LIBOR Plus 8.50% (Floor 1.50%), Current Coupon 10.00%,<br>Secured Debt (Maturity - August 28, 2025) (9)		5,879		5,756		5,756
			Common Stock (653 shares)				-		-
			Warrants (70 equivalent shares; Expiration - <br>August 28, 2030; Strike price - $0.01 per share)				-		-
							5,756		5,756

Bojangles', Inc. (11)	February 5, 2019	Quick Service Restaurant Group
			LIBOR Plus 4.75%, Current Coupon 4.91%, <br>Secured Debt (Maturity - January 28, 2026)		7,704		7,579		7,691
			LIBOR Plus 8.50%, Current Coupon 8.66%, <br>Secured Debt (Maturity - January 28, 2027)		5,000		4,914		4,800
							12,493		12,491

Brainworks Software, LLC (10)	August 12, 2014	Advertising Sales and Newspaper Circulation Software
			Prime Plus 9.25% (Floor 3.25%), Current Coupon 12.50%,<br>Secured Debt (Maturity - July 22, 2019) (9) (14) (17)		7,854		7,854		5,287

Brightwood Capital Fund Investments (12) (13)	July 21, 2014	Investment Partnership
			LP Interests (Brightwood Capital Fund III, LP)<br>(Fully diluted 1.60%) (8)				10,920		8,238
			LP Interests (Brightwood Capital Fund IV, LP)<br>(Fully diluted 0.60%) (8)				4,750		4,384
							15,670		12,622

Cadence Aerospace LLC (10)	November 14, 2017	Aerostructure Manufacturing
			LIBOR Plus 3.25% (Floor 1.00%), Current Coupon <br> 4.25% / 5.25% PIK, Current Coupon Plus PIK 9.50%, <br>Secured Debt (Maturity - November 14, 2023) (9) (19)		27,339		27,110		25,906

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

California Pizza Kitchen, Inc. (11)	August 29, 2016	Casual Restaurant Group
			LIBOR Plus 10.00% (Floor 1.50%), Current Coupon 11.50%, <br>Secured Debt (Maturity - December 31, 2020) (9)		3,716		3,395		3,716
			LIBOR Plus 10.00% (Floor 1.50%), Current Coupon 11.50%, <br>Secured Debt (Maturity - August 23, 2022) (9)		5,107		5,035		5,056
			LIBOR Plus 8.00% PIK (Floor 1.00%), Current Coupon 9.00% PIK, <br>Secured Debt (Maturity - August 23, 2022) (9) (14) (19)		12,064		11,990		3,679
							20,420		12,451

Central Security Group, Inc. (11)	December 4, 2017	Security Alarm Monitoring Service Provider
			LIBOR Plus 5.63% (Floor 1.00%), Current Coupon 6.63%, <br>Secured Debt (Maturity - October 6, 2021) (9) (14)		13,667		13,637		6,082

Cenveo Corporation (11)	September 4, 2015	Provider of Digital Marketing Agency Services
			LIBOR Plus 9.50% (Floor 1.00%), Current Coupon 10.50%,<br>Secured Debt (Maturity - June 7, 2023) (9)		5,445		5,308		5,159
			Common Stock (177,130 shares)				5,309		2,635
							10,617		7,794

Chisholm Energy Holdings, LLC (10)	May 15, 2019	Oil & Gas Exploration & Production
			LIBOR Plus 6.25% (Floor 1.50%), Current Coupon 7.75%, <br>Secured Debt (Maturity - May 15, 2026) (9)		3,571		3,496		3,404

Clarius BIGS, LLC (10)	September 23, 2014	Prints & Advertising Film Financing
			15.00% PIK Secured Debt (Maturity - January 5, 2015) (14) (17) (19)		2,832		2,832		31

Clickbooth.com, LLC (10)	December 5, 2017	Provider of Digital Advertising Performance Marketing Solutions
			LIBOR Plus 8.50% (Floor 1.00%), Current Coupon 9.50%, <br>Secured Debt (Maturity - January 31, 2025) (9)		8,357		8,245		8,357

Coastal Television Broadcasting Holdings LLC (10)	June 4, 2020	Operator of Television Broadcasting Networks
			LIBOR Plus 10.00% (Floor 2.00%), Current Coupon 12.00%, <br>Secured Debt (Maturity - June 4, 2025) (9)		8,678		8,499		8,499

Construction Supply Investments, LLC (10)	December 29, 2016	Distribution Platform of Specialty Construction Materials to Professional Concrete and Masonry Contractors
			Member Units (50,687 units)				5,637		8,130

Corel Corporation (11) (13) (21)	July 24, 2019	Publisher of Desktop and Cloud-based Software
			LIBOR Plus 5.00%, Current Coupon 5.26%, <br>Secured Debt (Maturity - July 2, 2026) (9)		19,527		18,669		19,064

CTVSH, PLLC (10)	August 3, 2017	Emergency Care and Specialty Service Animal Hospital
			LIBOR Plus 7.50% (Floor 1.00%), Current Coupon 8.50%, <br>Secured Debt (Maturity - August 3, 2022) (9)		9,249		9,208		9,249

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Darr Equipment LP (10)	April 15, 2014	Heavy Equipment Dealer
			11.50% Current / 1.00% PIK Secured Debt (Maturity -<br>June 22, 2023) (19)		5,944		5,944		5,944
			Warrants (915,734 equivalent units; Expiration - <br>December 23, 2023; Strike price - $1.50 per unit)				474		20
							6,418		5,964

Digital River, Inc. (11)	February 24, 2015	Provider of Outsourced e-Commerce Solutions and Services
			LIBOR Plus 7.00% (Floor 1.00%), Current Coupon 8.00%, <br>Secured Debt (Maturity - February 12, 2023) (9)		13,628		13,400		13,560

DTE Enterprises, LLC (10)	April 13, 2018	Industrial Powertrain Repair and Services
			LIBOR Plus 7.50% (Floor 1.50%), Current Coupon 9.00%, <br>Secured Debt (Maturity - April 13, 2023) (9)		10,992		10,860		10,984
			Class AA Preferred Member Units (non-voting; 10% <br>cumulative) (8) (19)				927		927
			Class A Preferred Member Units (776,316 units)				776		1,260
							12,563		13,171

Dynamic Communities, LLC (10)	July 17, 2018	Developer of Business Events and Online Community Groups
			LIBOR Plus 8.50% (Floor 1.00%), Current Coupon 9.50%, <br>Secured Debt (Maturity - July 17, 2023) (9)		5,355		5,287		5,140

Echo US Holdings, LLC. (10)	November 12, 2019	Developer and Manufacturer of PVC and Polypropylene Materials
			LIBOR Plus 6.25% (Floor 1.63%), Current Coupon 7.88%, <br>Secured Debt (Maturity - October 25, 2024) (9)		22,302		22,196		21,929

Electronic Transaction Consultants, LLC (10)	July 24, 2020	Technology Service Provider for Toll Road and Infrastructure Operators
			LIBOR Plus 7.50% (Floor 1.00%), Current Coupon 8.50%, <br>Secured Debt (Maturity - July 24, 2025) (9)		10,000		9,822		9,822

EnCap Energy Fund Investments (12) (13)	December 28, 2010	Investment Partnership
			LP Interests (EnCap Energy Capital Fund VIII, L.P.)<br>(Fully diluted 0.10%)				3,813		959
			LP Interests (EnCap Energy Capital Fund VIII Co-<br>Investors, L.P.) (Fully diluted 0.40%)				2,097		415
			LP Interests (EnCap Energy Capital Fund IX, L.P.) <br>(Fully diluted 0.10%) (8)				4,390		1,398
			LP Interests (EnCap Energy Capital Fund X, L.P.)<br>(Fully diluted 0.10%) (8)				8,607		6,313
			LP Interests (EnCap Flatrock Midstream Fund II, L.P.)<br>(Fully diluted 0.80%) (8)				7,390		3,976
			LP Interests (EnCap Flatrock Midstream Fund III, L.P.)<br>(Fully diluted 0.20%) (8)				6,982		5,994
							33,279		19,055

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Encino Acquisition Partners Holdings, Inc. (11)	November 16, 2018	Oil & Gas Exploration & Production
			LIBOR Plus 6.75% (Floor 1.00%), Current Coupon 7.75%, <br>Secured Debt (Maturity - October 29, 2025) (9)		9,000		8,929		7,234

EPIC Y-Grade Services, LP (11)	June 22, 2018	NGL Transportation & Storage
			LIBOR Plus 6.00%, (Floor 1.00%), Current Coupon 7.00%, Secured Debt (Maturity - June 30, 2027)		6,944		6,851		5,694

Fortna, Inc. (10)	July 23, 2019	Process, Physical Distribution and Logistics Consulting Services
			LIBOR Plus 5.00%, Current Coupon 5.15%, <br>Secured Debt (Maturity - April 8, 2025)		7,693		7,559		7,199

Fuse, LLC (11)	June 30, 2019	Cable Networks Operator
			12% Secured Debt (Maturity - June 28, 2024)		1,939		1,939		1,601
			Common Stock (10,429 shares)				256		-
							2,195		1,601

GeoStabilization International (GSI) (11)	December 31, 2018	Geohazard Engineering Services & Maintenance
			LIBOR Plus 5.25%, Current Coupon 5.40%, <br>Secured Debt (Maturity - December 19, 2025)		16,253		16,122		15,765

GoWireless Holdings, Inc. (11)	December 31, 2017	Provider of Wireless Telecommunications Carrier Services
			LIBOR Plus 6.50% (Floor 1.00%), Current Coupon 7.50%, <br>Secured Debt (Maturity - December 22, 2024) (9)		17,365		17,232		16,614

Grupo Hima San Pablo, Inc. (11)	March 7, 2013	Tertiary Care Hospitals
			LIBOR Plus 7.00% (Floor 1.50%), Current Coupon 9.25%, <br>Secured Debt (Maturity - April 30, 2019) (9) (17)		4,504		4,504		3,232
			13.75% Secured Debt (Maturity - October 15, 2018) (17)		2,055		2,040		49
							6,544		3,281

GS HVAM Intermediate, LLC (10)	October 18, 2019	Specialized Food Distributor
			LIBOR Plus 5.75% (Floor 1.00%), Current Coupon 6.75%, <br>Secured Debt (Maturity - October 2, 2024) (9)		11,506		11,396		11,079

Gexpro Services (10)	February 24, 2020	Distributor of Industrial and Specialty Parts
			LIBOR Plus 6.50% (Floor 1.50%), Current Coupon 8.00%, <br>Secured Debt (Maturity - February 24, 2025) (9)		29,253		28,735		28,034

HDC/HW Intermediate Holdings (10)	December 21, 2018	Managed Services and Hosting Provider
			LIBOR Plus 7.50% (Floor 1.00%), Current Coupon 8.50%, <br>Secured Debt (Maturity - December 21, 2023) (9)		3,478		3,429		3,262

Heartland Dental, LLC (10)	September 9, 2020	Dental Support Organization
			LIBOR Plus 6.50% (Floor 1.00%), Current Coupon 7.50%, <br>Secured Debt (Maturity - April 30, 2025) (9)		15,000		14,555		14,555

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Hoover Group, Inc. (10) (13)	October 21, 2016	Provider of Storage Tanks and Related Products to the Energy and Petrochemical Markets
			LIBOR Plus 7.25% (Floor 1.00%), Current Coupon 8.25%, <br>Secured Debt (Maturity - January 28, 2021) (9)		20,660		20,459		20,660

Hunter Defense Technologies, Inc. (10)	March 29, 2018	Provider of Military and Commercial Shelters and Systems
			LIBOR Plus 7.00% (Floor 1.00%), Current Coupon 8.00%,<br>Secured Debt (Maturity - March 29, 2023) (9)		30,701		30,335		30,701

HW Temps LLC	July 2, 2015	Temporary Staffing Solutions
			12.00% Secured Debt (Maturity - March 29, 2023)		9,921		9,807		8,915

Hydrofarm Holdings LLC (10)	May 18, 2017	Wholesaler of Horticultural Products
			LIBOR Plus 8.50%, Current Coupon 8.66% Secured <br>Debt (Maturity - May 12, 2022)		6,865		6,793		5,813

Hyperion Materials & Technologies, Inc. (11) (13)	September 12, 2019	Manufacturer of Cutting and Machine Tools & Specialty Polishing Compounds
			LIBOR Plus 5.50% (Floor 1.00%), Current Coupon 6.50%, <br>Secured Debt (Maturity - August 28, 2026) (9)		22,331		21,937		20,768

Ian, Evan & Alexander Corporation (EverWatch) (10)	July 31, 2020	Cybersecurity, Software and Data Analytics provider to the Intelligence Community
			LIBOR Plus 8.50% (Floor 1.00%), Current Coupon 9.50%,<br>Secured Debt (Maturity - July 31, 2025) (9)		16,529		16,141		16,141

iEnergizer Limited (10) (13) (21)	April 17, 2019	Provider of Business Outsourcing Solutions
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.00%,<br>Secured Debt (Maturity - April 17, 2024) (9)		10,675		10,589		10,675

Implus Footcare, LLC (10)	June 1, 2017	Provider of Footwear and Related Accessories
			LIBOR Plus 2.50% (Floor 1.00%), Current Coupon 3.50% / <br> PIK 5.25%, Current Coupon Plus PIK 8.75%, Secured <br>Debt (Maturity - April 30, 2024) (9) (19)		18,936		18,597		17,341

Independent Pet Partners Intermediate Holdings, LLC (10)	November 20, 2018	Omnichannel Retailer of Specialty Pet Products
			Prime Plus 2.75% (Floor 3.25%), Current Coupon 6.00%,<br>Secured Debt (Maturity - December 22, 2022) (9)		6,111		6,111		6,111
			LIBOR Plus 9.00% (Floor 1.00%), Current Coupon 12.00%, <br>Secured Debt (Maturity - November 19, 2023) (9) (14)		19,514		19,071		14,471
			Member Units (1,558,333 units)				1,558		-
							26,740		20,582

Industrial Services Acquisition, LLC (10)	June 17, 2016	Industrial Cleaning Services
			13% Unsecured Debt (Maturity - December 17, 2022)		5,428		5,377		5,428
			Preferred Member Units (Industrial Services Investments, LLC)<br>(144 units; 10% cumulative) (8) (19)				109		109
			Preferred Member Units (Industrial Services Investments, LLC)<br>(80 units; 20% cumulative) (8) (19)				68		68
			Member Units (Industrial Services Investments, LLC)<br>(900 units)				900		530
							6,454		6,135

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Inn of the Mountain Gods Resort and Casino (11)	October 30, 2013	Hotel & Casino Owner & Operator
			9.25% Secured Debt (Maturity - November 30, 2020)		7,176		7,145		6,745

Interface Security Systems, L.L.C (10)	August 7, 2019	Commercial Security & Alarm Services
			LIBOR Plus 7.00% (Floor 1.75%), Current Coupon 8.75% / <br>3.00% PIK, Secured Debt (Maturity - August 7, 2023) (9) (19)		7,615		7,501		7,615

Intermedia Holdings, Inc. (11)	August 3, 2018	Unified Communications as a Service
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.00%, <br>Secured Debt (Maturity - July 19, 2025) (9)		20,892		20,804		20,824

Invincible Boat Company, LLC. (10)	August 28, 2019	Manufacturer of Sport Fishing Boats
			LIBOR Plus 6.50% (Floor 1.00%), Current Coupon 8.00%, <br>Secured Debt (Maturity - August 28, 2025) (9)		9,263		9,174		9,050

Isagenix International, LLC (11)	June 21, 2018	Direct Marketer of Health & Wellness Products
			LIBOR Plus 5.75% (Floor 1.00%), Current Coupon 6.75%, <br>Secured Debt (Maturity - June 14, 2025) (9)		5,676		5,641		3,015

JAB Wireless, Inc. (10)	May 2, 2018	Fixed Wireless Broadband Provider
			LIBOR Plus 8.00% (Floor 1.00%), Current Coupon 8.17%, <br>Secured Debt (Maturity - May 2, 2023) (9)		14,606		14,522		14,491

Jackmont Hospitality, Inc. (10)	May 26, 2015	Franchisee of Casual Dining Restaurants
			LIBOR Plus 6.75% (Floor 1.00%), Current Coupon 7.75%, <br>Secured Debt (Maturity - May 26, 2021) (9)		4,007		4,004		3,345

Joerns Healthcare, LLC (11)	April 3, 2013	Manufacturer and Distributor of Health Care Equipment & Supplies
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.00%<br>Secured Debt (Maturity - August 21, 2024) (9)		4,016		3,952		3,914
			Common Stock (472,579 shares)				4,429		2,480
							8,381		6,394

Kemp Technologies Inc. (10)	June 27, 2019	Provider of Application Delivery Controllers
			LIBOR Plus 6.25% (Floor 1.00%), Current Coupon 7.25%, <br>Secured Debt (Maturity - March 29, 2024) (9)		7,406		7,291		7,352

Kore Wireless Group Inc. (11)	December 31, 2018	Mission Critical Software Platform
			LIBOR Plus 5.50%, Current Coupon 5.72%, <br>Secured Debt (Maturity - December 20, 2024)		19,139		19,047		18,182

Larchmont Resources, LLC (11)	August 13, 2013	Oil & Gas Exploration & Production
			LIBOR Plus 10.00% (Floor 1.00%), Current Coupon 11.00%, <br>Secured Debt (Maturity - August 9, 2021) (9)		2,145		2,145		965
			Member Units (Larchmont Intermediate Holdco, LLC)<br>(2,828 units)				353		113
							2,498		1,078

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Laredo Energy VI, LP (10)	January 15, 2019	Oil & Gas Exploration & Production
			Member Units (1,155,952 units)				11,560		11,560

Lightbox Holdings, L.P. (11)	May 23, 2019	Provider of Commercial Real Estate Software
			LIBOR Plus 5.00%, Current Coupon 5.15%, <br>Secured Debt (Maturity - May 9, 2026)		14,813		14,618		14,146

LKCM Headwater Investments I, L.P. (12) (13)	January 25, 2013	Investment Partnership
			LP Interests (Fully diluted 2.30%)				1,746		3,447

LL Management, Inc. (10)	May 2, 2019	Medical Transportation Service Provider
			LIBOR Plus 6.50% (Floor 1.00%), Current Coupon 7.50%, <br>Secured Debt (Maturity - September 25, 2023) (9)		13,615		13,511		13,348

Logix Acquisition Company, LLC (10)	June 24, 2016	Competitive Local Exchange Carrier
			LIBOR Plus 5.75% (Floor 1.00%), Current Coupon 6.75%, <br>Secured Debt (Maturity - December 22, 2024) (9)		26,201		24,541		24,236

Looking Glass Investments, LLC (12) (13)	July 1, 2015	Specialty Consumer<br>Finance
			Member Units (2.6 units)				125		25

LSF9 Atlantis Holdings, LLC (11)	May 17, 2017	Provider of Wireless Telecommunications Carrier Services
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.00%, <br>Secured Debt (Maturity - May 1, 2023) (9)		9,275		9,275		9,036

Lulu's Fashion Lounge, LLC (10)	August 31, 2017	Fast Fashion E-Commerce Retailer
			LIBOR Plus 7.00% (Floor 1.00%), Current Coupon 8.00% /<br> 2.50% PIK, Current Coupon Plus PIK 10.50%, Secured <br>Debt (Maturity - August 28, 2022) (9) (19)		11,408		11,213		9,754

Lynx FBO Operating LLC (10)	September 30, 2019	Fixed Based Operator in the General Aviation Industry
			LIBOR Plus 5.75% (Floor 1.00%), Current Coupon 7.25%, <br>Secured Debt (Maturity - September 30, 2024) (9)		13,613		13,355		13,069
			Member Units (3,704 units)				500		335
							13,855		13,404

Mac Lean-Fogg Company (10)	April 22, 2019	Manufacturer and Supplier for Auto and Power Markets
			LIBOR Plus 5.00%, Current Coupon 5.15%, <br>Secured Debt (Maturity - December 22, 2025)		16,522		16,415		15,664
			Preferred Stock (1,516 shares; 4.50% Cash / 9.25% PIK<br>cumulative) (8) (19)		1,828		1,828		1,743
							18,243		17,407

MHVC Acquisition Corp. (11)	May 8, 2017	Provider of Differentiated Information Solutions, Systems Engineering, and Analytics
			LIBOR Plus 5.25% (Floor 1.00%), Current Coupon 6.25%, <br>Secured Debt (Maturity - April 29, 2024) (9)		19,848		19,761		19,699

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Mileage Plus Holdings, LLC (11) (13)	July 20, 2020	United Airlines Loyalty Program
			LIBOR Plus 5.25% (Floor 1.00%), Current Coupon 6.25%, <br>Secured Debt (Maturity - June 25, 2027) (9)		10,000		9,880		10,185

Mills Fleet Farm Group, LLC (10)	October 24, 2018	Omnichannel Retailer of Work, Farm and Lifestyle Merchandise
			LIBOR Plus 6.25% (Floor 1.00%), Current Coupon 7.25%,<br>Secured Debt (Maturity - October 24, 2024) (9)		13,860		13,581		13,270

NBG Acquisition Inc (11)	April 28, 2017	Wholesaler of Home Décor Products
			LIBOR Plus 5.50% (Floor 1.00%), Current Coupon 6.50%, <br>Secured Debt (Maturity - April 26, 2024) (9)		4,098		4,059		1,788

NinjaTrader, LLC (10)	December 18, 2019	Operator of Futures Trading Platform
			LIBOR Plus 6.00% (Floor 1.50%), Current Coupon 7.50%, <br>Secured Debt (Maturity - December 18, 2024) (9)		9,125		8,963		9,122

NNE Partners, LLC (10)	March 2, 2017	Oil & Gas Exploration & Production
			LIBOR Plus 8.00%, Current Coupon 8.24%, Secured Debt<br>(Maturity - March 2, 2022)		23,417		23,297		21,407

Project Eagle Holdings, LLC (10)	July 6, 2020	Provider of Secure Business Collaboration Software
			LIBOR Plus 8.25% (Floor 1.00%), Current Coupon 9.25%,<br>Secured Debt (Maturity - July 6, 2026) (9)		15,000		14,607		14,607

Novetta Solutions, LLC (11)	June 21, 2017	Provider of Advanced Analytics Solutions for Defense Agencies
			LIBOR Plus 5.00% (Floor 1.00%), Current Coupon 6.00%, <br>Secured Debt (Maturity - October 17, 2022) (9)		23,032		22,712		22,629

NTM Acquisition Corp. (11)	July 12, 2016	Provider of B2B Travel Information Content
			LIBOR Plus 6.25% (Floor 1.00%), Current Coupon 7.25%, <br>Secured Debt (Maturity - June 7, 2022) (9)		4,722		4,722		4,249

Ospemifene Royalty Sub LLC (QuatRx) (10)	July 8, 2013	Estrogen-Deficiency Drug Manufacturer and Distributor
			11.50% Secured Debt (Maturity - November 15, 2026) (14)		4,786		4,786		142

PaySimple, Inc. (10)	September 9, 2019	Leading Technology Services Commerce Platform
			LIBOR Plus 5.50%, Current Coupon 5.65%, <br>Secured Debt (Maturity - August 23, 2025) (9)		24,448		24,212		23,593

PricewaterhouseCoopers Public Sector LLP (11)	May 24, 2018	Provider of Consulting Services to Governments
			LIBOR Plus 8.00%, Current Coupon 8.15%, Secured Debt<br>(Maturity - May 1, 2026)		9,000		8,968		8,685

PT Network, LLC (10)	November 1, 2013	Provider of Outpatient Physical Therapy and Sports Medicine Services
			LIBOR Plus 5.50% (Floor 1.00%), Current Coupon 6.73% /<br> 2.00% PIK, Current Coupon Plus PIK 8.73%, <br>Secured Debt (Maturity - November 30, 2023) (9) (19)		8,599		8,599		8,380

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Research Now Group, Inc. and Survey Sampling International, LLC (11)	December 31, 2017	Provider of Outsourced Online Surveying
			LIBOR Plus 5.50% (Floor 1.00%), Current Coupon 6.50%, <br>Secured Debt (Maturity - December 20, 2024) (9)		17,977		17,520		17,114

RM Bidder, LLC (10)	November 12, 2015	Scripted and Unscripted TV and Digital Programming Provider
			Warrants (327,532 equivalent units; Expiration - <br>October 20, 2025; Strike price - $14.28 per unit)				425		-
			Member Units (2,779 units)				46		20
							471		20

RTIC Subsidiary Holdings, LLC (10)	September 1, 2020	Direct-To-Consumer eCommerce Provider of Outdoor Products
			LIBOR Plus 7.75% (Floor 1.25%), Current Coupon 9.00%, <br>Secured Debt (Maturity - September 1, 2025) (9)		17,260		17,014		17,014

SAFETY Investment Holdings, LLC	April 29, 2016	Provider of Intelligent Driver Record Monitoring Software and Services
			Member Units (2,000,000 units)				2,000		2,060

Salient Partners L.P. (11)	June 25, 2015	Provider of Asset Management Services
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.00%, <br>Secured Debt (Maturity - August 31, 2021) (9)		6,450		6,441		5,879

Staples Canada ULC (10) (13) (21)	September 14, 2017	Office Supplies Retailer
			LIBOR Plus 7.00% (Floor 1.00%), Current Coupon 8.00%, <br>Secured Debt (Maturity - September 12, 2024) (9) (22)		13,482		13,331		12,009

TEAM Public Choices, LLC (10)	October 28, 2019	Home-Based Care Employment Service Provider
			LIBOR Plus 5.50% (Floor 1.50%), Current Coupon 7.00%,<br>Secured Debt (Maturity - September 20, 2024) (9)		17,328		17,178		16,821

Tectonic Financial, Inc.	May 15, 2017	Financial Services Organization
			Common Stock (200,000 shares)				2,000		2,600

TGP Holdings III LLC (11)	September 30, 2017	Outdoor Cooking & Accessories
			LIBOR Plus 8.50% (Floor 1.00%), Current Coupon 9.50%, <br>Secured Debt (Maturity - September 25, 2025) (9)		5,500		5,446		5,094

The Pasha Group (11)	February 2, 2018	Diversified Logistics and Transportation Provided
			LIBOR Plus 8.00% (Floor 1.00%), Current Coupon 9.00%, <br>Secured Debt (Maturity - January 26, 2023) (9)		10,867		10,198		10,052

USA DeBusk LLC (10)	October 22, 2019	Provider of Industrial Cleaning Services
			LIBOR Plus 5.75% (Floor 1.00%), Current Coupon 6.75%,<br>Secured Debt (Maturity - October 22, 2024) (9)		25,011		24,600		23,821

U.S. TelePacific Corp. (11)	September 14, 2016	Provider of Communications and Managed Services
			LIBOR Plus 5.50% (Floor 1.00%), Current Coupon 6.50%, <br>Secured Debt (Maturity - May 2, 2023) (9)		17,088		16,896		14,833

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Vida Capital, Inc (11)	October 10, 2019	Alternative Asset Manager
			LIBOR Plus 6.00%, Current Coupon 6.15%, <br>Secured Debt (Maturity - October 1, 2026)		18,176		17,939		18,176

Vistar Media, Inc. (10)	February 17, 2017	Operator of Digital Out-of-Home Advertising Platform
			LIBOR Plus 10.00% (Floor 1.00%), Current Coupon 12.00%,<br>Secured Debt (Maturity - April 3, 2023) (9)		4,596		4,464		4,594
			Preferred Stock (70,207 shares)				767		1,070
			Warrants (69,675 equivalent shares; Expiration - April <br>3, 2029; Strike price - $10.92 per share)				-		1,070
							5,231		6,734

Wireless Vision Holdings, LLC (10)	September 29, 2017	Provider of Wireless Telecommunications Carrier Services
			LIBOR Plus 8.94% (Floor 1.00%), Current Coupon 9.84% /<br> 1.00% PIK, Current Coupon Plus PIK 10.84%, Secured <br>Debt (Maturity - September 29, 2022) (9) (19) (23)		6,710		6,616		6,710
			LIBOR Plus 8.91% (Floor 1.00%), Current Coupon 9.91% /<br> 1.00% PIK, Current Coupon Plus PIK 10.91%, Secured <br>Debt (Maturity - September 29, 2022) (9) (19) (23)		5,830		5,772		5,829
							12,388		12,539

YS Garments, LLC (11)	August 22, 2018	Designer and Provider of Branded Activewear
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.00% <br>Secured Debt (Maturity - August 9, 2024) (9)		14,091		13,990		12,811

Zilliant Incorporated	June 15, 2012	Price Optimization and Margin Management Solutions
			Preferred Stock (186,777 shares)				154		260
			Warrants (952,500 equivalent shares; Expiration - <br>June 15, 2022; Strike price - $0.001 per share)				1,071		1,190
							1,225		1,450
Subtotal Non-Control/Non-Affiliate Investments (85.3% of net assets at fair value)						$	1,330,738	$	1,215,902
Total Portfolio Investments, September 30, 2020						$	2,528,245	$	2,584,645


(1)	All investments are Lower Middle Market portfolio investments, unless otherwise noted. See Note B for a description of Lower Middle Market portfolio investments. All of the Company’s investments, unless otherwise noted, are encumbered either as security for the Company’s Credit Facility or in support of the SBA-guaranteed debentures issued by the Funds.
(2)	Debt investments are income producing, unless otherwise noted. Equity and warrants are non-income producing, unless otherwise noted.
(3)	See Note C and Schedule 12-14 for a summary of geographic location of portfolio companies.
(4)	Principal is net of repayments. Cost is net of repayments and accumulated unearned income.
(5)	Control investments are defined by the Investment Company Act of 1940, as amended ("1940 Act"), as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained.
(6)	Affiliate investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments.
(7)	Non-Control/Non-Affiliate investments are defined by the 1940 Act as investments that are neither Control investments nor Affiliate investments.
(8)	Income producing through dividends or distributions.
(9)	Index based floating interest rate is subject to contractual minimum interest rate. A majority of the variable rate loans in the Company’s investment portfolio bear interest at a rate that may be determined by reference to either LIBOR or an alternate Base Rate (commonly based on the Federal Funds Rate or the Prime Rate), which typically resets semi-annually, quarterly, or monthly at the borrower’s option. The borrower may also elect to have multiple interest reset periods for each loan. For each such loan, the Company has provided the weighted

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

September 30, 2020

(dollars in thousands)

	average annual stated interest rate in effect at September 30, 2020. As noted in this schedule, 58% of the loans (based on the par amount) contain LIBOR floors which range between 0.50% and 2.00%, with a weighted-average LIBOR floor of approximately 1.09%.
(10)	Private Loan portfolio investment. See Note B for a description of Private Loan portfolio investments.
(11)	Middle Market portfolio investment. See Note B for a description of Middle Market portfolio investments.
(12)	Other Portfolio investment. See Note B for a description of Other Portfolio investments.
(13)	Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets.
(14)	Non-accrual and non-income producing investment.
(15)	Portfolio company is in a bankruptcy process and, as such, the maturity date of our debt investment in this portfolio company will not be finally determined until such process is complete. As noted in footnote (14), our debt investment in this portfolio company is on non-accrual status.
(16)	External Investment Manager. Investment is not encumbered as security for the Company's Credit Facility or in support of the SBA-guaranteed debentures issued by the Funds.
(17)	Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.
(18)	Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C for further discussion.
(19)	PIK interest income and cumulative dividend income represent income not paid currently in cash.
(20)	All portfolio company headquarters are based in the United States, unless otherwise noted.
(21)	Portfolio company headquarters are located outside of the United States.
(22)	In connection with the Company's debt investment in Staples Canada ULC and in an attempt to mitigate any potential adverse change in foreign exchange rates during the term of the Company's investment, the Company maintains a forward foreign currency contract with Cadence Bank to lend $16.3 million Canadian Dollars and receive $12.4 million U.S. Dollars with a settlement date of September 14, 2021. The unrealized appreciation on the forward foreign currency contract is $0.2 million as of September 30, 2020.
(23)	The Company has entered into an intercreditor agreement that entitles the Company to the "last out" tranche of the first lien secured loans, whereby the "first out" tranche will receive priority as to the "last out" tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of LIBOR plus 8.50% (Floor 1.00%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
(24)	Investment has an unfunded commitment as of September 30, 2020 (see Note K). The fair value of the investment includes the impact of the fair value of any unfunded commitments.
(25)	All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities.”
(26)	Investment date represents the date of initial investment in the portfolio company.

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)
Control Investments(5)

Access Media Holdings, LLC (10)	July 22, 2015	Private Cable Operator
			10% PIK Secured Debt (Maturity - July 22, 2020) (14) (19)	$	23,828	$	23,828	$	6,387
			Preferred Member Units (9,481,500 units) (27)				9,375		(284)
			Member Units (45 units)				1		-
							33,204		6,103

ASC Interests, LLC	August 1, 2013	Recreational and<br>Educational Shooting<br>Facility
			11.00% Secured Debt (Maturity - July 31, 2020)		1,650		1,639		1,639
			Member Units (1,500 units)				1,500		1,290
							3,139		2,929

Analytical Systems Keco, LLC	August 16, 2019	Manufacturer of Liquid and <br>Gas Analyzers
			LIBOR Plus 10.00% (Floor 2.00%), Current Coupon <br>12.13%, Secured Debt (Maturity - August 16, 2024) (9)		5,565		5,210		5,210
			Preferred Member Units (3,200 units)				3,200		3,200
			Warrants (420 equivalent shares; Expiration - August <br>16, 2029; Strike price - $0.01 per share)				316		316
							8,726		8,726

ATS Workholding, LLC (10)	March 10, 2014	Manufacturer of Machine<br>Cutting Tools and<br>Accessories
			5% Secured Debt (Maturity - November 16, 2021)		4,919		4,666		4,521
			Preferred Member Units (3,725,862 units)				3,726		939
							8,392		5,460

Bond-Coat, Inc.	December 28, 2012	Casing and Tubing<br>Coating Services
			15.00% Secured Debt (Maturity - December 28, 2020)		11,596		11,473		11,473
			Common Stock (57,508 shares)				6,350		8,300
							17,823		19,773

Brewer Crane Holdings, LLC	January 9, 2018	Provider of Crane Rental<br>and Operating Services
			LIBOR Plus 10.00% (Floor 1.00%), Current Coupon <br>11.71%, Secured Debt (Maturity - January 9, 2023) (9)		9,052		8,989		8,989
			Preferred Member Units (2,950 units) (8)				4,280		4,280
							13,269		13,269

Bridge Capital Solutions Corporation	April 18, 2012	Financial Services<br>and Cash Flow<br>Solutions Provider
			13.00% Secured Debt (Maturity - December 11, 2024)		8,813		7,797		7,797
			Warrants (82 equivalent shares; Expiration - July <br>25, 2026; Strike price - $0.01 per share)				2,132		3,500
			13.00% Secured Debt (Mercury Service Group, LLC)<br>(Maturity - December 11, 2024)		1,000		996		996
			Preferred Member Units (Mercury Service Group, LLC)<br>(17,742 units) (8)				1,000		1,000
							11,925		13,293

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Café Brazil, LLC	April 20, 2004	Casual Restaurant<br>Group
			Member Units (1,233 units) (8)				1,742		2,440

California Splendor Holdings LLC	March 30, 2018	Processor of Frozen Fruits
			LIBOR Plus 8.00% (Floor 1.00%), Current Coupon 10.13%,<br>Secured Debt (Maturity - March 30, 2023) (9)		7,229		7,104		7,104
			LIBOR Plus 10.00% (Floor 1.00%), Current Coupon 12.13%,<br>Secured Debt (Maturity - March 30, 2023) (9)		28,000		27,801		27,801
			Preferred Member Units (6,725 units) (8)				7,163		7,163
			Preferred Member Units (6,157 units) (8)				10,775		7,382
							52,843		49,450

CBT Nuggets, LLC ("CBT")	June 1, 2006	Produces and Sells IT<br>Training Certification<br>Videos
			Member Units (416 units) (8)				1,300		50,850

Centre Technologies Holdings, LLC	January 4, 2019	Provider of IT Hardware Services and Software Solutions
			LIBOR Plus 9.00% (Floor 2.00%), Current Coupon 10.75%,<br>Secured Debt (Maturity - January 4, 2024) (9)		12,240		12,136		12,136
			Preferred Member Units (12,696 units)				5,840		5,840
							17,976		17,976

Chamberlin Holding LLC	February 26, 2018	Roofing and Waterproofing<br>Specialty Contractor
			LIBOR Plus 10.00% (Floor 1.00%), Current Coupon 12.00%,<br>Secured Debt (Maturity - February 26, 2023) (9)		17,773		17,649		17,773
			Member Units (4,347 units) (8)				11,440		24,040
			Member Units (Chamberlin Langfield Real Estate, LLC)<br>(1,047,146 units) (8)				1,047		1,450
							30,136		43,263

Charps, LLC	February 3, 2017	Pipeline Maintenance<br>and Construction
			15.00% Secured Debt (Maturity - June 5, 2022)		2,000		2,000		2,000
			Preferred Member Units (1,600 units) (8)				400		6,920
							2,400		8,920

Clad-Rex Steel, LLC	December 20, 2016	Specialty Manufacturer<br>of Vinyl-Clad Metal
			LIBOR Plus 9.00% (Floor 1.00%), Current Coupon 10.71%,<br>Secured Debt (Maturity - December 20, 2021) (9)		10,880		10,830		10,781
			Member Units (717 units) (8)				7,280		9,630
			10.00% Secured Debt (Clad-Rex Steel RE Investor, LLC)<br>(Maturity - December 20, 2036)		1,137		1,126		1,137
			Member Units (Clad-Rex Steel RE Investor, LLC)<br>(800 units)				210		460
							19,446		22,008

CMS Minerals Investments	January 30, 2015	Oil & Gas <br> Exploration <br>& Production
			Member Units (CMS Minerals II, LLC) (100 units) (8)				2,386		1,900

CompareNetworks Topco, LLC	January 29, 2019	Internet Publishing and Web Search Portals
			LIBOR Plus 11.00% (Floor 1.00%), Current Coupon 12.75%,<br>Secured Debt (Maturity - January 29, 2024) (9)		8,364		8,288		8,288
			Preferred Member Units (1,975 units)				1,975		3,010
							10,263		11,298

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Copper Trail Fund Investments (12) (13)	July 17, 2017	Investment Partnership
			LP Interests (CTMH, LP) (Fully diluted 38.8%)				872		872

Datacom, LLC	May 30, 2014	Technology and<br>Telecommunications<br>Provider
			8.00% Secured Debt (Maturity - May 31, 2021) (14)		1,800		1,800		1,615
			10.50% PIK Secured Debt (Maturity - May 31, 2021) (14) (19)		12,507		12,475		10,142
			Class A Preferred Member Units				1,294		-
			Class B Preferred Member Units (6,453 units)				6,030		-
							21,599		11,757

Digital Products Holdings LLC	April 1, 2018	Designer and Distributor<br>of Consumer Electronics
			LIBOR Plus 10.00% (Floor 1.00%), Current Coupon 11.75%,<br>Secured Debt (Maturity - April 1, 2023) (9)		19,620		19,478		18,452
			Preferred Member Units (3,857 shares) (8)				9,501		5,174
							28,979		23,626

Direct Marketing Solutions, Inc.	February 13, 2018	Provider of Omni-Channel<br>Direct Marketing Services
			LIBOR Plus 11.00% (Floor 1.00%), Current Coupon <br>12.75%, Secured Debt (Maturity - February 13, 2023) (9)		15,717		15,597		15,707
			Preferred Stock (8,400 shares)				8,400		20,200
							23,997		35,907

Gamber-Johnson Holdings, LLC ("GJH")	June 24, 2016	Manufacturer of<br>Ruggedized Computer<br>Mounting Systems
			LIBOR Plus 6.50% (Floor 2.00%), Current Coupon 8.50%,<br>Secured Debt (Maturity - June 24, 2021) (9)		19,022		18,949		19,022
			Member Units (8,619 units) (8)				14,844		53,410
							33,793		72,432

Garreco, LLC	July 15, 2013	Manufacturer and<br>Supplier of Dental<br>Products
			LIBOR Plus 8.00% (Floor 1.00%, Ceiling 1.50%), Current <br>Coupon 9.50%, Secured Debt (Maturity - March 31, 2020) (9)		4,519		4,515		4,515
			Member Units (1,200 units)				1,200		2,560
							5,715		7,075

GRT Rubber Technologies LLC ("GRT")	December 19, 2014	Manufacturer of <br>Engineered Rubber<br>Products
			LIBOR Plus 7.00%, Current Coupon 8.71%,<br>Secured Debt (Maturity - December 31, 2023)		15,016		15,016		15,016
			Member Units (5,879 units)				13,065		47,450
							28,081		62,466

Guerdon Modular Holdings, Inc.	August 13, 2014	Multi-Family and<br>Commercial Modular<br>Construction Company
			LIBOR Plus 8.50% (Floor 1.00%), Current Coupon 10.60%,<br>Secured Debt (Maturity - October 1, 2019) (9) (14) (17)		1,010		1,010		-
			16.00% Secured Debt (Maturity - October 1, 2019) (14) (17)		12,588		12,588		-
			Preferred Stock (404,998 shares)				1,140		-
			Common Stock (212,033 shares)				2,983		-
			Warrants (6,208,877 equivalent shares; Expiration - <br>April 25, 2028; Strike price - $0.01 per share)				-		-
							17,721		-

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MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Gulf Manufacturing, LLC	August 31, 2007	Manufacturer of<br>Specialty Fabricated<br>Industrial Piping<br>Products
			Member Units (438 units) (8)				2,980		7,430

Gulf Publishing Holdings, LLC	April 29, 2016	Energy Industry Focused<br>Media and Publishing
			LIBOR Plus 9.50% (Floor 1.00%), Current Coupon 11.21%,<br>Secured Debt (Maturity - September 30, 2020) (9)		280		280		280
			12.50% Secured Debt (Maturity - April 29, 2021)		12,535		12,493		12,493
			Member Units (3,681 units)				3,681		2,420
							16,454		15,193

Harborside Holdings, LLC	March 20, 2017	Real Estate Holding<br>Company
			Member units (100 units)				6,506		9,560

Harris Preston Fund Investments (12) (13)	October 1, 2017	Investment Partnership
			LP Interests (2717 MH, L.P.) (Fully diluted 49.3%)				2,735		3,157

Harrison Hydra-Gen, Ltd.	June 4, 2010	Manufacturer of<br>Hydraulic Generators
			Common Stock (107,456 shares) (8)				718		7,970

IDX Broker, LLC	November 15, 2013	Provider of Marketing<br>and CRM Tools for<br>the Real Estate<br>Industry
			11.50% Secured Debt (Maturity - November 15, 2020)		13,400		13,358		13,400
			Preferred Member Units (5,607 units) (8)				5,952		15,040
							19,310		28,440

Jensen Jewelers of Idaho, LLC	November 14, 2006	Retail Jewelry Store
			Prime Plus 6.75% (Floor 2.00%), Current Coupon <br>11.50%, Secured Debt (Maturity - November 14,<br>2023) (9)		4,000		3,960		4,000
			Member Units (627 units) (8)				811		8,270
							4,771		12,270

J&J Services, Inc.	October 31, 2019	Provider of Dumpster and <br> Portable Toilet Rental <br>Services
			11.50% Secured Debt (Maturity - October 31, 2024)		17,600		17,430		17,430
			Preferred Stock (2,814 shares)				7,160		7,160
							24,590		24,590

KBK Industries, LLC	January 23, 2006	Manufacturer of Specialty<br>Oilfield and Industrial<br>Products
			Member Units (325 units) (8)				783		15,470

Kickhaefer Manufacturing Company, LLC	October 31, 2018	Precision Metal Parts Manufacturing
			11.50% Secured Debt (Maturity - October 31, 2023)		25,200		24,982		24,982
			Member Units (581 units)				12,240		12,240
			9.00% Secured Debt (Maturity - October 31, 2048)		3,978		3,939		3,939
			Member Units (KMC RE Investor, LLC) (800 units) (8)				992		1,160
							42,153		42,321

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Market Force Information, LLC	July 28, 2017	Provider of Customer <br>Experience Management<br>Services
			8.00% Secured Debt (Maturity - July 28, 2022)		2,786		2,786		2,695
			6.00% Current / 6.00% PIK Secured Debt (Maturity - <br>July 28, 2022) (19)		23,292		23,157		22,621
			Member Units (743,921 units)				16,642		5,280
							42,585		30,596

MH Corbin Holding LLC	August 31, 2015	Manufacturer and <br> Distributor of Traffic <br>Safety Products
			5.00% Current / 5.00% PIK Secured Debt (Maturity - <br>March 31, 2022) (19)		8,890		8,815		8,890
			Preferred Member Units (66,000 shares)				4,400		4,770
			Preferred Member Units (4,000 shares)				6,000		20
							19,215		13,680

Mid-Columbia Lumber Products, LLC	December 18, 2006	Manufacturer of<br>Finger-Jointed<br>Lumber Products
			10.00% Secured Debt (Maturity - January 15, 2020)		1,750		1,750		1,602
			12.00% Secured Debt (Maturity - January 15, 2020)		3,900		3,898		3,644
			Member Units (7,874 units)				3,239		-
			9.50% Secured Debt (Mid-Columbia Real Estate, LLC)<br>(Maturity - May 13, 2025)		701		701		701
			Member Units (Mid-Columbia Real Estate, LLC)<br>(500 units) (8)				790		1,640
							10,378		7,587

MSC Adviser I, LLC (16)	November 22, 2013	Third Party Investment<br>Advisory Services
			Member Units (Fully diluted 100.0%) (8)				-		74,520

Mystic Logistics Holdings, LLC	August 18, 2014	Logistics and Distribution<br>Services Provider for<br>Large Volume Mailers
			12.00% Secured Debt (Maturity - August 15. 2019) (17)		6,253		6,253		6,253
			Common Stock (5,873 shares) (8)				2,720		8,410
							8,973		14,663

NAPCO Precast, LLC	January 31, 2008	Precast Concrete<br>Manufacturing
			Member Units (2,955 units) (8)				2,975		14,760

NexRev LLC	February 28, 2018	Provider of Energy<br>Efficiency Products &<br>Services
			11.00% Secured Debt (Maturity - February 28, 2023)		17,586		17,469		17,469
			Preferred Member Units (86,400,000 units) (8)				6,880		6,310
							24,349		23,779

NRI Clinical Research, LLC	September 8, 2011	Clinical Research<br>Service Provider
			14.00% Secured Debt (Maturity - June 8, 2022)		5,981		5,885		5,981
			Warrants (251,723 equivalent units; Expiration - <br>June 8, 2027; Strike price - $0.01 per unit)				252		1,230
			Member Units (1,454,167 units) (8)				765		4,988
							6,902		12,199

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

NRP Jones, LLC	December 22, 2011	Manufacturer of<br>Hoses, Fittings and<br>Assemblies
			12.00% Secured Debt (Maturity - March 20, 2023)		6,376		6,376		6,376
			Member Units (65,962 units) (8)				3,717		4,710
							10,093		11,086

NuStep, LLC	January 31, 2017	Designer, Manufacturer<br>and Distributor of Fitness<br>Equipment
			12.00% Secured Debt (Maturity - January 31, 2022)		19,800		19,703		19,703
			Preferred Member Units (406 units)				10,200		10,200
							29,903		29,903

OMi Holdings, Inc.	April 1, 2008	Manufacturer of<br>Overhead Cranes
			Common Stock (1,500 shares) (8)				1,080		16,950

Pegasus Research Group, LLC	January 6, 2011	Provider of<br>Telemarketing<br>and Data Services
			Member Units (460 units)				1,290		8,170

PPL RVs, Inc.	June 10, 2010	Recreational Vehicle<br>Dealer
			LIBOR Plus 8.75% (Floor 0.50%), Current Coupon 10.85%,<br>Secured Debt (Maturity - November 15, 2022) (9)		12,245		12,118		12,118
			Common Stock (1,962 shares)				2,150		9,930
							14,268		22,048

Principle Environmental, LLC (d/b/a TruHorizon Environmental Solutions)	February 1, 2011	Noise Abatement<br>Service Provider
			13.00% Secured Debt (Maturity - April 30, 2020)		6,397		6,379		6,397
			Preferred Member Units (19,631 units) (8)				4,600		13,390
			Warrants (1,018 equivalent units; Expiration - January <br>31, 2021; Strike price - $0.01 per unit)				1,200		1,090
							12,179		20,877

Quality Lease Service, LLC	June 8, 2015	Provider of Rigsite<br>Accommodation Unit<br>Rentals and Related<br>Services
			Member Units (1,000 units)				11,013		9,289

River Aggregates, LLC	March 30, 2011	Processor of Construction<br>Aggregates
			Zero Coupon Secured Debt (Maturity - June 30, 2018) (17)		750		750		722
			Member Units (1,150 units)				1,150		4,990
			Member Units (RA Properties, LLC) (1,500 units)				369		3,169
							2,269		8,881

Tedder Industries, LLC	August 31, 2018	Manufacturer of Firearm <br>Holsters and Accessories
			12.00% Secured Debt (Maturity - August 31, 2020)		640		640		640
			12.00% Secured Debt (Maturity - August 31, 2023)		16,400		16,272		16,272
			Preferred Member Units (479 units)				8,136		8,136
							25,048		25,048

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

The MPI Group, LLC	October 2, 2007	Manufacturer of<br>Custom Hollow<br>Metal Doors, Frames<br>and Accessories
			9.00% Secured Debt (Maturity - December 31, 2019) (17)		2,924		2,924		2,924
			Series A Preferred Units (2,500 units)				2,500		-
			Warrants (1,424 equivalent units; Expiration - <br>July 1, 2024; Strike price - $0.01 per unit)				1,096		-
			Member Units (MPI Real Estate Holdings, LLC)<br>(100 units) (8)				2,300		1,640
							8,820		4,564

Trantech Radiator Topco, LLC	May 31, 2019	Transformer Cooling <br>Products and Services
			12.00% Secured Debt (Maturity - May 31, 2024)		9,200		9,102		9,102
			Common Stock (615 shares) (8)				4,655		4,655
							13,757		13,757

Vision Interests, Inc.	June 5, 2007	Manufacturer / Installer<br>of Commercial Signage
			13.00% Secured Debt (Maturity - September 30, 2019) (17)		2,028		2,028		2,028
			Series A Preferred Stock (3,000,000 shares)				3,000		4,089
			Common Stock (1,126,242 shares)				3,706		409
							8,734		6,526

Ziegler's NYPD, LLC	October 1, 2008	Casual Restaurant<br>Group
			6.50% Secured Debt (Maturity - October 1, 2020)		1,000		1,000		1,000
			12.00% Secured Debt (Maturity - October 1, 2020)		625		625		625
			14.00% Secured Debt (Maturity - October 1, 2020)		2,750		2,750		2,750
			Warrants (587 equivalent units; Expiration - <br>October 1, 2020; Strike price - $0.01 per unit)				600		-
			Preferred Member Units (10,072 units)				2,834		1,269
							7,809		5,644
Subtotal Control Investments (67.2% of net assets at fair value)						$	778,367	$	1,032,721

Affiliate Investments (6)

AFG Capital Group, LLC	November 7, 2014	Provider of Rent-to-Own <br>Financing Solutions and<br>Services
			10.00% Secured Debt (Maturity - May 25, 2022)		838		838		838
			Preferred Member Units (186 units)				1,200		5,180
							2,038		6,018

American Trailer Rental Group LLC	June 7, 2017	Provider of Short-term<br> Trailer and Container <br>Rental
			LIBOR Plus 7.25% (Floor 1.00%), Current Coupon 9.34%,<br>Secured Debt (Maturity - June 7, 2022) (9)		27,087		26,905		27,087
			Member Units (Milton Meisler Holdings LLC) <br>(48,555 units)				4,855		8,540
							31,760		35,627

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

BBB Tank Services, LLC	April 8, 2016	Maintenance, Repair and<br>Construction Services to<br>the Above-Ground<br>Storage Tank Market
			LIBOR Plus 11.00% (Floor 1.00%), Current Coupon 12.71%, <br>(Maturity - April 8, 2021) (9)		4,800		4,698		4,698
			Preferred Stock (non-voting) (8)				131		131
			Member Units (800,000 units)				800		290
							5,629		5,119

Boccella Precast Products LLC	June 30, 2017	Manufacturer of Precast <br>Hollow Core Concrete
			LIBOR Plus 12.00% (Floor 1.00%), Current Coupon 14.10%,<br>Secured Debt (Maturity - June 30, 2022) (9)		13,244		13,106		13,244
			Member Units (2,160,000 units) (8)				2,256		6,270
							15,362		19,514

Buca C, LLC	June 30, 2015	Casual Restaurant<br>Group
			LIBOR Plus 9.25% (Floor 1.00%), Current Coupon<br>10.94%, Secured Debt (Maturity - June 30, 2020) (9)		19,004		18,981		18,794
			Preferred Member Units (6 units; 6% cumulative) (8) (19)				4,701		4,701
							23,682		23,495

CAI Software LLC	October 10, 2014	Provider of Specialized<br>Enterprise Resource<br>Planning Software
			11.00% Secured Debt (Maturity - December 7, 2023)		9,160		9,077		9,160
			Member Units (66,968 units) (8)				751		5,210
							9,828		14,370

Chandler Signs Holdings, LLC (10)	January 4, 2016	Sign Manufacturer
			Class A Units (1,500,000 units) (8)				1,500		2,740

Charlotte Russe, Inc (11)	May 28, 2013	Fast-Fashion Retailer to <br>Young Women
			Common Stock (19,041 shares)				3,141		-

Congruent Credit OpportunitiesFunds (12) (13)	January 24, 2012	Investment Partnership
			LP Interests (Congruent Credit Opportunities Fund <br>II, LP) (Fully diluted 19.8%)				5,210		855
			LP Interests (Congruent Credit Opportunities Fund <br>III, LP) (Fully diluted 17.4%) (8)				13,601		13,915
							18,811		14,770

Copper Trail Fund Investments (12) (13)	July 17, 2017	Investment Partnership
			LP Interests (Copper Trail Energy Fund I, LP) (Fully <br>diluted 12.4%) (8)				1,997		2,362

Dos Rios Partners (12) (13) ****	April 25, 2013	Investment Partnership
			LP Interests (Dos Rios Partners, LP) (Fully diluted<br>20.2%)				5,846		7,033
			LP Interests (Dos Rios Partners - A, LP) (Fully diluted<br>6.4%)				1,856		2,233
							7,702		9,266

East Teak Fine Hardwoods, Inc.	April 13, 2006	Distributor of<br>Hardwood Products
			Common Stock (6,250 shares) (8)				480		400

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

EIG Fund Investments (12) (13)	November 6, 2015	Investment Partnership
			LP Interests (EIG Global Private Debt Fund-A, L.P.)<br>(Fully diluted 11.1%) (8)				768		720

Freeport Financial Funds (12) (13)	June 13, 2013	Investment Partnership
			LP Interests (Freeport Financial SBIC Fund LP)<br>(Fully diluted 9.3%)				5,974		5,778
			LP Interests (Freeport First Lien Loan Fund III LP)<br>(Fully diluted 6.0%) (8)				9,956		9,696
							15,930		15,474

Fuse, LLC (11)	June 30, 2019	Cable Networks Operator
			12% Secured Debt (Maturity - June 28, 2024)		1,939		1,939		1,939
			Common Stock (10,429 shares)				256		256
							2,195		2,195

Harris Preston Fund Investments (12) (13)	August 9, 2017	Investment Partnership
			LP Interests (HPEP 3, L.P.) (Fully diluted 8.2%)				2,474		2,474

Hawk Ridge Systems, LLC (13)	December 2, 2016	Value-Added Reseller of<br>Engineering Design and<br>Manufacturing Solutions
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.71%,<br>Secured Debt (Maturity - December 2, 2021) (9)		600		600		600
			11.00% Secured Debt (Maturity - December 2, 2021)		13,400		13,335		13,400
			Preferred Member Units (226 units) (8)				2,850		7,900
			Preferred Member Units (HRS Services, ULC)<br>(226 units)				150		420
							16,935		22,320

Houston Plating and Coatings, LLC	January 8, 2003	Provider of Plating and<br>Industrial Coating<br>Services
			8.00% Unsecured Convertible Debt (Maturity - <br>May 1, 2022)		3,000		3,000		4,260
			Member Units (322,297 units) (8)				2,352		10,330
							5,352		14,590

I-45 SLF LLC (12) (13)	October 20, 2015	Investment Partnership
			Member Units (Fully diluted 20.0%; 24.4% profits<br>interest) (8)				17,000		14,407

L.F. Manufacturing Holdings,LLC (10)	December 23, 2013	Manufacturer of<br>Fiberglass Products
			Preferred Member Units (non-voting; 14% <br>cumulative) (8) (19)				81		81
			Member Units (2,179,001 units)				2,019		2,050
							2,100		2,131

OnAsset Intelligence, Inc.	April 18, 2011	Provider of Transportation<br>Monitoring / Tracking<br>Products and Services
			12.00% PIK Secured Debt (Maturity - June 30, 2021) (19)		6,474		6,474		6,474
			10.00% PIK Unsecured Debt (Maturity - June 30, 2021) (19)		58		58		58
			Preferred Stock (912 shares)				1,981		-
			Warrants (5,333 equivalent shares; Expiration - <br>April 18, 2021; Strike price - $0.01 per share)				1,919		-
							10,432		6,532

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

PCI Holding Company, Inc.	December 18, 2012	Manufacturer of Industrial<br>Gas Generating Systems
			12.00% Secured Debt (Maturity - March 31, 2020)		11,356		11,356		11,356
			Preferred Stock (1,740,000 shares) (non-voting)				1,740		4,350
			Preferred Stock (1,500,000 shares)				3,927		2,680
							17,023		18,386

Rocaceia, LLC (Quality Lease and Rental Holdings, LLC)	January 8, 2013	Provider of Rigsite<br>Accommodation Unit<br>Rentals and Related<br>Services
			12.00% Secured Debt (Maturity - January 8, 2018) (14) (15)		30,369		29,865		-
			Preferred Member Units (250 units)				2,500		-
							32,365		-

Salado Stone Holdings, LLC (10)	June 27, 2016	Limestone and Sandstone<br>Dimension Cut Stone<br>Mining Quarries
			Class A Preferred Units (Salado Acquisition, LLC) (2,000,000 units)				2,000		570

SI East, LLC	August 31, 2018	Rigid Industrial Packaging <br>Manufacturing
			9.50% Secured Debt (Maturity - August 31, 2023)		32,963		32,687		32,963
			Preferred Member Units (157 units) (8)				6,000		8,200
							38,687		41,163

Slick Innovations, Inc.	September 13, 2018	Text Message Marketing <br>Platform
			14.00% Secured Debt (Maturity - September 13, 2023)		6,360		6,197		6,197
			Common Stock (70,000 shares) (8)				700		1,080
			Warrants (18,084 equivalent units; Expiration -<br>September 13, 2028; Strike price - $0.01 per unit)				181		290
							7,078		7,567

UniTek Global Services, Inc. (11)	April 15, 2011	Provider of Outsourced<br>Infrastructure Services
			LIBOR Plus 6.50% (Floor 1.00%), Current Coupon 8.41%, <br>Secured Debt (Maturity - August 20, 2024) (9)		2,963		2,940		2,962
			Preferred Stock (755,401 shares; 20% cumulative) (8) (19)				809		1,889
			Preferred Stock (1,521,122 shares; 19% cumulative) (8) (19)				1,976		2,282
			Preferred Stock (2,281,682 shares; 19% cumulative) (8) (19)				3,667		3,667
			Preferred Stock (4,336,866 shares; 13.50% cumulative) (8) (19)				7,924		2,684
			Common Stock (945,507 shares)				-		-
							17,316		13,484

Universal Wellhead Services Holdings, LLC (10)	October 30, 2014	Provider of Wellhead<br>Equipment, Designs,<br>and Personnel to the<br>Oil & Gas Industry
			Preferred Member Units (UWS Investments, LLC)<br>(716,949 units; 14% cumulative) (8) (19)				1,032		800
			Member Units (UWS Investments, LLC) (4,000,000 units)				4,000		-
							5,032		800

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)
Volusion, LLC	January 26, 2015	Provider of Online <br> Software-as-a-Service <br>eCommerce Solutions
			11.50% Secured Debt (Maturity - January 26, 2020)		20,234		20,162		19,352
			8.00% Unsecured Convertible Debt (Maturity - <br>November 16, 2023)		409		409		291
			Preferred Member Units (4,876,670 units)				14,000		14,000
			Warrants (1,831,355 equivalent units; Expiration -<br>January 26, 2025; Strike price - $0.01 per unit)				2,576		150
							37,147		33,793
Subtotal Affiliate Investments (21.5% of net assets at fair value)						$	351,764	$	330,287
Non-Control/Non-Affiliate Investments (7)

AAC Holdings, Inc. (11)	June 30, 2017	Substance Abuse <br> Treatment Service <br>Provider
			LIBOR Plus 11.00% (Floor 1.00%), Current Coupon 13.03%, <br>Secured Debt (Maturity - April 15, 2020) (9) (14)		2,227		2,068		2,172
			LIBOR Plus 12.75% (Floor 1.00%), Current Coupon 16.50%,<br>Secured Debt (Maturity - June 30, 2023) (9) (14)		14,396		14,030		9,358
							16,098		11,530

Adams Publishing Group, LLC (10)	November 19, 2015	Local Newspaper<br>Operator
			Prime Plus 5.00% (Floor 1.50%), Current Coupon 8.75%, <br>Secured Debt (Maturity - July 3, 2023) (9)		5,000		4,930		5,000
			LIBOR Plus 7.50% (Floor 1.50%), Current Coupon 9.44%, <br>Secured Debt (Maturity - July 3, 2023) (9)		6,158		6,058		6,158
			LIBOR Plus 7.50% (Floor 1.50%), Current Coupon 9.50%, <br>Secured Debt (Maturity - July 3, 2023) (9)		197		197		197
							11,185		11,355

ADS Tactical, Inc. (10)	March 7, 2017	Value-Added Logistics<br>and Supply Chain<br>Provider to the Defense<br>Industry
			LIBOR Plus 6.25% (Floor 0.75%), Current Coupon 8.03%,<br>Secured Debt (Maturity - July 26, 2023) (9)		19,843		19,703		19,843

Aethon United BR LP (10)	September 8, 2017	Oil & Gas Exploration &<br>Production
			LIBOR Plus 6.75% (Floor 1.00%), Current Coupon 8.46%, <br>Secured Debt (Maturity - September 8, 2023) (9)		9,750		9,630		9,531

Affordable Care Holding Corp. (10)	May 9, 2019	Dental Service <br>Organization
			LIBOR Plus 4.75% (Floor 1.00%), Current Coupon 6.59%, <br>Secured Debt (Maturity - October 22, 2022) (9)		14,396		14,126		14,036

ALKU, LLC. (11)	October 18, 2019	Specialty National <br>Staffing Operator
			LIBOR Plus 5.50% (Floor 1.00%), Current Coupon 7.44%, <br>Secured Debt (Maturity - July 29, 2026) (9)		10,000		9,902		9,883

Allen Media, LLC. (11)	September 18, 2018	Operator of Cable <br>Television Networks
			LIBOR Plus 6.50% (Floor 1.00%), Current Coupon 8.48%, <br>Secured Debt (Maturity - August 30, 2023) (9)		16,270		15,894		15,863

Allen Media Broadcasting LLC (10)	July 3, 2019	Operator of Television<br>Broadcasting Networks
			LIBOR Plus 6.25% (Floor 1.00%), Current Coupon 8.21%, <br>Secured Debt (Maturity - July 3, 2024) (9)		14,906		14,565		14,565

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

American Nuts, LLC (10)	April 10, 2018	Roaster, Mixer and<br>Packager of Bulk Nuts<br>and Seeds
			LIBOR Plus 9.50% (Floor 1.00%), Current Coupon 11.60%, <br>Secured Debt (Maturity - April 10, 2023) (9)		12,243		12,002		12,233

American Teleconferencing Services, Ltd. (11)	May 19, 2016	Provider of Audio<br>Conferencing and Video<br>Collaboration Solutions
			LIBOR Plus 6.50% (Floor 1.00%), Current Coupon 8.36%, <br>Secured Debt (Maturity - June 8, 2023) (9)		17,389		16,421		10,460

APTIM Corp. (11)	August 17, 2018	Engineering, Construction <br>& Procurement
			7.75% Secured Debt (Maturity - June 15, 2025)		12,452		10,836		7,471

Arcus Hunting LLC (10)	January 6, 2015	Manufacturer of<br>Bowhunting and Archery<br>Products and Accessories
			LIBOR Plus 10.00% (Floor 1.00%), Current Coupon 12.10%, <br>Secured Debt (Maturity - January 13, 2020) (9)		13,857		13,856		13,856

ASC Ortho Management Company, LLC (10)	August 31, 2018	Provider of Orthopedic <br>Services
			LIBOR Plus 7.50% (Floor 1.00%), Current Coupon 9.60%, <br>Secured Debt (Maturity - August 31, 2023) (9)		4,543		4,465		4,490
			13.25% PIK Secured Debt (Maturity - December 1, 2023) (19)		1,854		1,821		1,854
							6,286		6,344

ATI Investment Sub, Inc. (11)	July 11, 2016	Manufacturer of Solar<br>Tracking Systems
			LIBOR Plus 7.25% (Floor 1.00%), Current Coupon 9.01%, <br>Secured Debt (Maturity - June 22, 2021) (9)		2,885		2,859		2,853

ATX Networks Corp. (11) (13) (21)	June 30, 2015	Provider of Radio<br>Frequency Management<br>Equipment
			LIBOR Plus 6.00% (Floor 1.00%) Current Coupon 7.94% / <br>1.00% PIK, Current Coupon Plus PIK 8.94%<br>Secured Debt (Maturity - June 11, 2021) (9) (19)		13,593		13,414		12,743

Barfly Ventures, LLC (10)	August 31, 2015	Casual Restaurant<br>Group
			12.00% Secured Debt (Maturity - August 31, 2020)		10,185		10,073		7,736
			Options (3 equivalent units)				607		-
			Warrant (2 equivalent unit; Expiration - August 31,<br>2025; Strike price - $1.00 per unit)				473		-
							11,153		7,736

Berry Aviation, Inc. (10)	July 6, 2018	Charter Airline Services
			10.50% Current / 1.5% PIK, Secured Debt (Maturity - <br>January 6, 2024) (19)		4,554		4,518		4,554
			Preferred Member Units (Berry Acquisition, LLC) <br>(122,416 units; 16% cumulative) (8) (19)				125		125
			Preferred Member Units (Berry Acquisition, LLC) <br>(1,548,387 units; 8% cumulative) (8) (19)				1,671		776
							6,314		5,455

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

BigName Commerce, LLC (10)	May 11, 2017	Provider of Envelopes <br> and Complimentary <br>Stationery Products
			LIBOR Plus 7.25% (Floor 1.00%), Current Coupon 9.35%,<br>Secured Debt (Maturity - May 11, 2022) (9)		2,233		2,218		2,233

Binswanger Enterprises, LLC (10)	March 10, 2017	Glass Repair and<br>Installation Service<br>Provider
			LIBOR Plus 8.50% (Floor 1.00%), Current Coupon 10.41%,<br>Secured Debt (Maturity - March 9, 2022) (9)		13,731		13,443		13,731
			Member Units (1,050,000 units)				1,050		950
							14,493		14,681

Bluestem Brands, Inc. (11)	December 19, 2013	Multi-Channel Retailer of<br>General Merchandise
			LIBOR Plus 7.50% (Floor 1.00%), Current Coupon 9.31%, <br>Secured Debt (Maturity - November 6, 2020) (9)		10,622		10,571		7,973

Bojangles', Inc. (11)	February 5, 2019	Quick Service Restaurant <br>Group
			LIBOR Plus 4.75%, Current Coupon 6.50%, <br>Secured Debt (Maturity - January 28, 2026)		7,782		7,642		7,827
			LIBOR Plus 8.50%, Current Coupon 10.25%, <br>Secured Debt (Maturity - January 28, 2027)		5,000		4,907		5,012
							12,549		12,839

Brainworks Software, LLC (10)	August 12, 2014	Advertising Sales and<br>Newspaper Circulation<br>Software
			4.00% Secured Debt (Maturity - July 22, 2019) (9) (17)		6,733		6,733		5,955

Brightwood Capital Fund Investments (12) (13)	July 21, 2014	Investment Partnership
			LP Interests (Brightwood Capital Fund III, LP)<br>(Fully diluted 1.6%) (8)				11,160		9,005
			LP Interests (Brightwood Capital Fund IV, LP)<br>(Fully diluted 0.6%) (8)				4,500		4,504
							15,660		13,509

Cadence Aerospace LLC (10)	November 14, 2017	Aerostructure<br>Manufacturing
			LIBOR Plus 6.50% (Floor 1.00%), Current Coupon 8.40%, <br>Secured Debt (Maturity - November 14, 2023) (9)		25,287		25,089		25,287

California Pizza Kitchen, Inc. (11)	August 29, 2016	Casual Restaurant Group
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.91%, <br>Secured Debt (Maturity - August 23, 2022) (9)		14,599		14,501		12,739

Central Security Group, Inc. (11)	December 4, 2017	Security Alarm Monitoring<br>Service Provider
			LIBOR Plus 5.63% (Floor 1.00%), Current Coupon 7.38%, <br>Secured Debt (Maturity - October 6, 2021) (9)		13,776		13,734		11,985

Cenveo Corporation (11)	September 4, 2015	Provider of Digital <br> Marketing Agency <br>Services
			LIBOR Plus 9.50% (Floor 1.00%), Current Coupon 11.45%,<br>Secured Debt (Maturity - June 7, 2023) (9)		5,674		5,498		5,674
			Common Stock (177,130 shares)				5,309		2,923
							10,807		8,597

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Chisholm Energy Holdings, LLC (10)	May 15, 2019	Oil & Gas Exploration & <br>Production
			LIBOR Plus 6.25% (Floor 1.50%), Current Coupon 8.16%, <br>Secured Debt (Maturity - May 15, 2026) (9)		3,571		3,488		3,488

Clarius BIGS, LLC (10)	September 23, 2014	Prints & Advertising<br>Film Financing
			15% PIK Secured Debt (Maturity - January 5, 2015) (14) (17)		2,846		2,846		40

Clickbooth.com, LLC (10)	December 5, 2017	Provider of Digital<br>Advertising Performance<br>Marketing Solutions
			LIBOR Plus 8.50% (Floor 1.00%), Current Coupon 10.59%, <br>Secured Debt (Maturity - December 5, 2022) (9)		2,663		2,625		2,663

Construction Supply Investments, LLC (10)	December 29, 2016	Distribution Platform of<br>Specialty Construction<br>Materials to<br>Professional Concrete<br>and Masonry Contractors
			Member Units (46,152 units)				4,866		7,667

Corel Corporation (11) (13) (21)	July 24, 2019	Publisher of Desktop and <br>Cloud-based Software
			LIBOR Plus 5.00% (Floor 1.00%), Current Coupon 6.91%, <br>Secured Debt (Maturity - July 2, 2026) (9)		15,000		14,293		14,531

CTVSH, PLLC (10)	August 3, 2017	Emergency Care and<br>Specialty Service Animal<br>Hospital
			LIBOR Plus 8.00% (Floor 1.00%), Current Coupon 9.91%, <br>Secured Debt (Maturity - August 3, 2022) (9)		10,099		10,039		10,099

Darr Equipment LP (10)	April 15, 2014	Heavy Equipment Dealer
			11.5% Current / 1% PIK Secured Debt (Maturity -<br>June 22, 2023) (19)		5,899		5,899		5,899
			Warrants (915,734 equivalent units; Expiration - <br>December 23, 2023; Strike price - $1.50 per unit)				474		300
							6,373		6,199

Digital River, Inc. (11)	February 24, 2015	Provider of Outsourced <br>e-Commerce Solutions<br>and Services
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.90%, <br>Secured Debt (Maturity - February 12, 2021) (9)		15,876		15,771		15,837

DTE Enterprises, LLC (10)	April 13, 2018	Industrial Powertrain<br>Repair and Services
			LIBOR Plus 7.50% (Floor 1.50%), Current Coupon 9.24%, <br>Secured Debt (Maturity - April 13, 2023) (9)		10,992		10,827		10,982
			Class AA Preferred Member Units (non-voting; 10% <br>cumulative) (8) (19)				860		860
			Class A Preferred Member Units (776,316 units)				776		1,490
							12,463		13,332

Dynamic Communities, LLC (10)	July 17, 2018	Developer of Business <br> Events and Online <br>Community Groups
			LIBOR Plus 8.00% (Floor 1.00%), Current Coupon 9.75%, <br>Secured Debt (Maturity - July 17, 2023) (9)		5,460		5,375		5,458

Echo US Holdings, LLC. (10)	November 12, 2019	Developer and <br> Manufacturer of PVC and <br>Polypropylene Materials
			LIBOR Plus 6.25% (Floor 1.63%), Current Coupon 7.96%, <br>Secured Debt (Maturity - October 25, 2024) (9)		22,414		22,292		22,292

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

EnCap Energy Fund Investments (12) (13)	December 28, 2010	Investment Partnership
			LP Interests (EnCap Energy Capital Fund VIII, L.P.)<br>(Fully diluted 0.1%) (8)				3,617		1,354
			LP Interests (EnCap Energy Capital Fund VIII Co-<br>Investors, L.P.) (Fully diluted 0.4%)				2,097		703
			LP Interests (EnCap Energy Capital Fund IX, L.P.) <br>(Fully diluted 0.1%) (8)				4,360		2,780
			LP Interests (EnCap Energy Capital Fund X, L.P.)<br>(Fully diluted 0.1%) (8)				8,427		8,822
			LP Interests (EnCap Flatrock Midstream Fund II, L.P.)<br>(Fully diluted 0.8%) (8)				7,337		5,669
			LP Interests (EnCap Flatrock Midstream Fund III, L.P.)<br>(Fully diluted 0.2%) (8)				6,674		6,677
							32,512		26,005

Encino Acquisition Partners Holdings, Inc. (11)	November 16, 2018	Oil & Gas Exploration & <br>Production
			LIBOR Plus 6.75% (Floor 1.00%), Current Coupon 8.50%, <br>Secured Debt (Maturity - October 29, 2025) (9)		9,000		8,921		6,795

EPIC Y-Grade Services, LP (11)	June 22, 2018	NGL Transportation &<br>Storage
			LIBOR Plus 6.00%, Current Coupon 8.04%, Secured Debt<br>(Maturity - June 13, 2024)		10,275		10,116		10,050

Evergreen Skills Lux S.á r.l.(d/b/a Skillsoft) (11) (13)	May 5, 2014	Technology-based<br>Performance Support<br>Solutions
			LIBOR Plus 8.25% (Floor 1.00%), Current Coupon 10.45%, <br>Secured Debt (Maturity - April 28, 2022) (9)		6,999		6,928		1,965

Felix Investments Holdings II (10)	August 9, 2017	Oil & Gas Exploration & <br>Production
			LIBOR Plus 6.50% (Floor 1.00%), Current Coupon 8.40%, <br>Secured Debt (Maturity - August 9, 2022) (9)		5,000		4,944		5,000

Flavors Holdings Inc. (11)	October 15, 2014	Global Provider of<br>Flavoring and<br>Sweetening Products
			LIBOR Plus 5.75% (Floor 1.00%), Current Coupon 7.77%, <br>Secured Debt (Maturity - April 3, 2020) (9)		11,297		11,247		10,619

Fortna, Inc. (10)	July 23, 2019	Process, Physical Distribution <br> and Logistics Consulting <br>Services
			LIBOR Plus 5.00%, Current Coupon 6.75%, <br>Secured Debt (Maturity - April 8, 2025)		7,751		7,577		7,577

GeoStabilization International (GSI) (11)	December 31, 2018	Geohazard Engineering <br>Services & Maintenance
			LIBOR Plus 5.25%, Current Coupon 7.05%, <br>Secured Debt (Maturity - December 19, 2025)		16,376		16,230		16,335

GoWireless Holdings, Inc. (11)	December 31, 2017	Provider of Wireless <br> Telecommunications <br>Carrier Services
			LIBOR Plus 6.50% (Floor 1.00%), Current Coupon 8.25%, <br>Secured Debt (Maturity - December 22, 2024) (9)		18,120		17,964		17,471

Grupo Hima San Pablo, Inc. (11)	March 7, 2013	Tertiary Care Hospitals
			LIBOR Plus 7.00% (Floor 1.50%), Current Coupon 8.91%, <br>Secured Debt (Maturity - April 30, 2019) (9) (17)		4,504		4,504		3,343
			13.75% Secured Debt (Maturity - October 15, 2018) (17)		2,055		2,040		167
							6,544		3,510

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

GS HVAM Intermediate, LLC (10)	October 18, 2019	Specialized Food<br>Distributor
			LIBOR Plus 5.75% (Floor 1.00%), Current Coupon 7.51%, <br>Secured Debt (Maturity - October 2, 2024) (9)		11,364		11,233		11,233

HDC/HW Intermediate Holdings (10)	December 21, 2018	Managed Services and <br>Hosting Provider
			LIBOR Plus 7.50% (Floor 1.00%), Current Coupon 9.53%, <br>Secured Debt (Maturity - December 21, 2023) (9)		3,498		3,440		3,493

Hoover Group, Inc. (10) (13)	October 21, 2016	Provider of Storage<br>Tanks and Related<br>Products to the Energy<br>and Petrochemical<br>Markets
			LIBOR Plus 7.25% (Floor 1.00%), Current Coupon 9.26%, <br>Secured Debt (Maturity - January 28, 2021) (9)		20,764		20,119		19,206

Hunter Defense Technologies, Inc. (10)	March 29, 2018	Provider of Military<br>and Commercial Shelters<br>and Systems
			LIBOR Plus 7.00% (Floor 1.00%), Current Coupon 9.02%,<br>Secured Debt (Maturity - March 29, 2023) (9)		29,097		28,659		29,097

HW Temps LLC	July 2, 2015	Temporary Staffing<br>Solutions
			8.00% Secured Debt (Maturity - March 29, 2023)		10,181		10,025		8,913

Hydrofarm Holdings LLC (10)	May 18, 2017	Wholesaler of <br>Horticultural Products
			LIBOR Plus 10.00%, Current Coupon 3.54% / 8.26% PIK, <br> Current Coupon Plus PIK 11.80% Secured Debt <br>(Maturity - May 12, 2022) (19)		7,660		7,547		6,414

Hyperion Materials & Technologies, Inc. (11) (13)	September 12, 2019	Manufacturer of Cutting <br> and Machine Tools & <br> Speciality Polishing <br>Compounds
			LIBOR Plus 5.50% (Floor 1.00%), Current Coupon 7.25%, <br>Secured Debt (Maturity - August 28, 2026) (9)		22,500		22,066		22,275

iEnergizer Limited (10) (13) (21)	April 17, 2019	Provider of Business <br>Outsourcing Solutions
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.79%,<br>Secured Debt (Maturity - April 17, 2024) (9)		12,963		12,848		12,962

Implus Footcare, LLC (10)	June 1, 2017	Provider of Footwear and <br>Related Accessories
			LIBOR Plus 6.25% (Floor 1.00%), Current Coupon 8.27%, <br>Secured Debt (Maturity - April 30, 2024) (9)		18,577		18,178		18,217

Independent Pet Partners Intermediate Holdings, LLC (10)	November 20, 2018	Omnichannel Retailer of Specialty Pet Products
			LIBOR Plus 9.00% (Floor 1.00%), Current Coupon 11.28%, <br>Secured Debt (Maturity - November 19, 2023) (9)		18,799		18,487		18,799
			Member Units (1,558,333 units)				1,558		1,260
							20,045		20,059

Industrial Services Acquisition, LLC (10)	June 17, 2016	Industrial Cleaning<br>Services
			6% Current / 7% PIK Unsecured Debt (Maturity - <br>December 17, 2022) (19)		5,242		5,174		5,242
			Preferred Member Units (Industrial Services Investments, LLC)<br>(144 units; 10% cumulative) (8) (19)				103		103
			Preferred Member Units (Industrial Services Investments, LLC)<br>(80 units; 20% cumulative) (8) (19)				60		60
			Member Units (Industrial Services Investments, LLC)<br>(900 units)				900		510
							6,237		5,915

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Inn of the Mountain Gods Resortand Casino (11)	October 30, 2013	Hotel & Casino Owner &<br>Operator
			9.25% Secured Debt (Maturity - November 30, 2020)		7,762		7,584		7,684

Interface Security Systems, L.L.C (10)	August 7, 2019	Commercial Security & <br>Alarm Services
			LIBOR Plus 7.00% (Floor 1.75%), Current Coupon 8.77%, <br>Secured Debt (Maturity - August 7, 2023) (9)		7,500		7,363		7,363

Intermedia Holdings, Inc. (11)	August 3, 2018	Unified Communications <br>as a Service
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.75%, <br>Secured Debt (Maturity - July 19, 2025) (9)		20,130		20,033		20,180

Invincible Boat Company, LLC. (10)	August 28, 2019	Manufacturer of Sport <br>Fishing Boats
			LIBOR Plus 6.50% (Floor 1.00%), Current Coupon 8.53%, <br>Secured Debt (Maturity - August 28, 2025) (9)		9,872		9,773		9,773

Isagenix International, LLC (11)	June 21, 2018	Direct Marketer of Health <br>& Wellness Products
			LIBOR Plus 5.75% (Floor 1.00%), Current Coupon 7.77%, <br>Secured Debt (Maturity - June 14, 2025) (9)		5,943		5,893		4,273

JAB Wireless, Inc. (10)	May 2, 2018	Fixed Wireless<br>Broadband Provider
			LIBOR Plus 8.00% (Floor 1.00%), Current Coupon 9.74%, <br>Secured Debt (Maturity - May 2, 2023) (9)		14,775		14,669		14,775

Jackmont Hospitality, Inc. (10)	May 26, 2015	Franchisee of Casual<br>Dining Restaurants
			LIBOR Plus 6.75% (Floor 1.00%), Current Coupon 8.45%, <br>Secured Debt (Maturity - May 26, 2021) (9)		4,059		4,055		4,059

Joerns Healthcare, LLC (11)	April 3, 2013	Manufacturer and<br>Distributor of Health<br>Care Equipment &<br>Supplies
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.91%<br>Secured Debt (Maturity - August 21, 2024) (9)		4,016		3,942		3,942
			Common Stock (472,579 shares)				4,429		4,429
							8,371		8,371

Kemp Technologies Inc. (10)	June 27, 2019	Provider of Application <br>Delivery Controllers
			LIBOR Plus 6.25% (Floor 1.00%), Current Coupon 8.00%, <br>Secured Debt (Maturity - March 29, 2024) (9)		7,462		7,326		7,463

Kore Wireless Group Inc. (11)	December 31, 2018	Mission Critical Software <br>Platform
			LIBOR Plus 5.50%, Current Coupon 7.52%, <br>Secured Debt (Maturity - December 20, 2024)		19,285		19,189		19,164

Larchmont Resources, LLC (11)	August 13, 2013	Oil & Gas Exploration <br>& Production
			LIBOR Plus 7.00% (Floor 1.00%), Current Coupon 8.89%, <br>Secured Debt (Maturity - August 7, 2020) (9)		2,145		2,145		1,990
			Member Units (Larchmont Intermediate Holdco, LLC)<br>(2,828 units)				353		707
							2,498		2,697

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Laredo Energy VI, LP (10)	January 15, 2019	Oil & Gas Exploration & <br>Production
			LIBOR Plus 9.63% (Floor 2.00%), Current Coupon 5.38% / 6.26% PIK, Current Coupon Plus PIK 11.64%, Secured Debt (Maturity - November 19, 2021) (9) (19)		11,312		11,166		10,638

Lightbox Holdings, L.P. (11)	May 23, 2019	Provider of Commercial <br>Real Estate Software
			LIBOR Plus 5.00%, Current Coupon 6.74%, <br>Secured Debt (Maturity - May 9, 2026)		14,925		14,713		14,738

LKCM Headwater Investments I, L.P. (12) (13)	January 25, 2013	Investment Partnership
			LP Interests (Fully diluted 2.3%) (8)				1,746		3,682

LL Management, Inc. (10)	May 2, 2019	Medical Transportation <br>Service Provider
			LIBOR Plus 6.50% (Floor 1.00%), Current Coupon 8.56%, <br>Secured Debt (Maturity - September 25, 2023) (9)		13,754		13,625		13,751

Logix Acquisition Company, LLC (10)	June 24, 2016	Competitive Local<br>Exchange Carrier
			LIBOR Plus 5.75% (Floor 1.00%), Current Coupon 7.50%, <br>Secured Debt (Maturity - December 22, 2024) (9)		18,381		18,199		18,197

Looking Glass Investments, LLC (12) (13)	July 1, 2015	Specialty Consumer<br>Finance
			Member Units (2.5 units)				125		25
			Member Units (LGI Predictive Analytics LLC)<br>(190,712 units)				49		16
							174		41

LSF9 Atlantis Holdings, LLC (11)	May 17, 2017	Provider of Wireless <br> Telecommunications <br>Carrier Services
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.74%, <br>Secured Debt (Maturity - May 1, 2023) (9)		9,458		9,458		8,761

Lulu's Fashion Lounge, LLC (10)	August 31, 2017	Fast Fashion E-Commerce<br>Retailer
			LIBOR Plus 9.00% (Floor 1.00%), Current Coupon 10.75%, <br>Secured Debt (Maturity - August 28, 2022) (9)		11,335		11,070		11,109

Lynx FBO Operating LLC (10)	September 30, 2019	Fixed Based Operator in <br> the General Aviation <br>Industry
			LIBOR Plus 5.75% (Floor 1.00%), Current Coupon 7.86%, <br>Secured Debt (Maturity - September 30, 2024) (9)		13,750		13,451		13,451
			Member Units (3,704 units)				500		500
							13,951		13,951

Mac Lean-Fogg Company (10)	April 22, 2019	Manufacturer and <br> Supplier for Auto and <br>Power Markets
			LIBOR Plus 5.00%, Current Coupon 6.75%, <br>Secured Debt (Maturity - December 22, 2025)		16,648		16,528		16,643
			Preferred Stock (1,516 shares; 4.50% Cash / 9.25% PIK<br>cumulative) (8) (19)		1,775		1,775		1,775
							18,303		18,418

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

MHVC Acquisition Corp. (11)	May 8, 2017	Provider of differentiated <br> information solutions, <br> systems engineering, <br>and analytics
			LIBOR Plus 5.25% (Floor 1.00%), Current Coupon 7.01%, <br>Secured Debt (Maturity - April 29, 2024) (9)		19,950		19,855		19,950

Mills Fleet Farm Group, LLC (10)	October 24, 2018	Omnichannel Retailer of <br> Work, Farm and Lifestyle <br>Merchandise
			LIBOR Plus 6.25% (Floor 1.00%), Current Coupon 8.29% /<br> 0.75% PIK, Current Coupon Plus PIK 9.04%, <br>Secured Debt (Maturity - October 24, 2024) (9) (19)		14,879		14,556		14,187

NBG Acquisition Inc (11)	April 28, 2017	Wholesaler of Home <br>Décor Products
			LIBOR Plus 5.50% (Floor 1.00%), Current Coupon 7.52%, <br>Secured Debt (Maturity - April 26, 2024) (9)		4,181		4,134		3,247

NinjaTrader, LLC (10)	December 18, 2019	Operator of Futures Trading Platform
			LIBOR Plus 6.00% (Floor 1.50%), Current Coupon 7.90%, <br>Secured Debt (Maturity - December 18, 2024) (9)		9,675		9,490		9,490

NNE Partners, LLC (10)	March 2, 2017	Oil & Gas Exploration<br>& Production
			LIBOR Plus 8.00%, Current Coupon 9.91%, Secured Debt<br>(Maturity - March 2, 2022)		23,417		23,268		23,147

North American Lifting Holdings, Inc. (11)	February 26, 2015	Crane Service Provider
			LIBOR Plus 4.50% (Floor 1.00%), Current Coupon 6.52%, <br>Secured Debt (Maturity - November 27, 2020) (9)		7,584		7,300		6,417

Novetta Solutions, LLC (11)	June 21, 2017	Provider of Advanced <br> Analytics Solutions for <br>Defense Agencies
			LIBOR Plus 5.00% (Floor 1.00%), Current Coupon 6.76%, <br>Secured Debt (Maturity - October 17, 2022) (9)		21,060		20,673		20,749

NTM Acquisition Corp. (11)	July 12, 2016	Provider of B2B Travel<br>Information Content
			LIBOR Plus 6.25% (Floor 1.00%), Current Coupon 8.00%, <br>Secured Debt (Maturity - June 7, 2022) (9)		4,879		4,874		4,879

Ospemifene Royalty Sub LLC (QuatRx) (10)	July 8, 2013	Estrogen-Deficiency<br> Drug Manufacturer and <br>Distributor
			11.5% Secured Debt (Maturity - November 15, 2026) (14)		4,868		4,868		463

PaySimple, Inc. (10)	September 9, 2019	Leading technology services commerce platform
			LIBOR Plus 5.50% (Floor 1.00%), Current Coupon 7.28%, <br>Secured Debt (Maturity - August 23, 2025) (9)		15,845		15,586		15,766

Permian Holdco 2, Inc. (11)	February 12, 2013	Storage Tank Manufacturer
			14.00% PIK Unsecured Debt (Maturity - <br>October 15, 2021) (19)		456		456		341
			18.00% PIK Unsecured Debt (Maturity - <br>June 30, 2022) (19)		319		319		319
			Preferred Stock (Permian Holdco 1, Inc.) (154,558 units)				799		100
							1,574		760

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Point.360 (10)	July 8, 2015	Fully Integrated Provider<br>of Digital Media Services
			Warrants (65,463 equivalent shares; Expiration - <br>July 7, 2020; Strike price - $0.75 per share)				69		-
			Common Stock (163,658 shares)				273		-
							342		-

PricewaterhouseCoopers Public Sector LLP (11)	May 24, 2018	Provider of Consulting<br>Services to Governments
			LIBOR Plus 8.00%, Current Coupon 9.75%, Secured Debt<br>(Maturity - May 1, 2026)		9,000		8,965		8,865

PT Network, LLC (10)	November 1, 2013	Provider of Outpatient<br>Physical Therapy and<br>Sports Medicine Services
			LIBOR Plus 5.50% (Floor 1.00%), Current Coupon 7.44% /<br> 2.00% PIK, Current Coupon Plus PIK 9.44%, <br>Secured Debt (Maturity - November 30, 2023) (9) (19)		8,491		8,491		8,414

Research Now Group, Inc. and Survey Sampling International, LLC (11)	December 31, 2017	Provider of Outsourced <br>Online Surveying
			LIBOR Plus 5.50% (Floor 1.00%), Current Coupon 7.41%, <br>Secured Debt (Maturity - December 20, 2024) (9)		18,115		17,590		18,140

RM Bidder, LLC (10)	November 12, 2015	Scripted and Unscripted<br>TV and Digital<br>Programming Provider
			Warrants (327,532 equivalent units; Expiration - <br>October 20, 2025; Strike price - $14.28 per unit)				425		-
			Member Units (2,779 units)				46		18
							471		18

SAFETY Investment Holdings, LLC	April 29, 2016	Provider of Intelligent<br>Driver Record<br>Monitoring Software<br>and Services
			Member Units (2,000,000 units)				2,000		2,380

Salient Partners L.P. (11)	June 25, 2015	Provider of Asset <br>Management Services
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.69%, <br>Secured Debt (Maturity - June 9, 2021) (9)		6,675		6,657		6,675

SMART Modular Technologies, Inc. (10) (13)	August 18, 2017	Provider of Specialty<br>Memory Solutions
			LIBOR Plus 6.25% (Floor 1.00%), Current Coupon 8.16%, <br>Secured Debt (Maturity - August 9, 2022) (9)		18,484		18,332		18,669

Staples Canada ULC (10) (13) (21)	September 14, 2017	Office Supplies Retailer
			LIBOR Plus 7.00% (Floor 1.00%), Current Coupon 8.98%, <br>Secured Debt (Maturity - September 12, 2024) (9) (22)		14,546		14,348		13,530

TE Holdings, LLC (11)	December 5, 2013	Oil & Gas Exploration<br>& Production
			Member Units (97,048 units)				970		-

TEAM Public Choices, LLC (10)	October 28, 2019	Home-Based Care <br> Employment Service <br>Provider
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.75%,<br>Secured Debt (Maturity - September 20, 2024) (9)		16,844		16,680		16,680

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Tectonic Financial, Inc.	May 15, 2017	Financial Services <br>Organization
			Common Stock (400,000 shares) (8)				2,000		2,620

TGP Holdings III LLC (11)	September 30, 2017	Outdoor Cooking & <br>Accessories
			LIBOR Plus 8.50% (Floor 1.00%), Current Coupon 10.25%, <br>Secured Debt (Maturity - September 25, 2025) (9)		5,500		5,440		5,143

The Pasha Group (11)	February 2, 2018	Diversified Logistics and<br>Transportation Provided
			LIBOR Plus 7.50% (Floor 1.00%), Current Coupon 9.31%, <br>Secured Debt (Maturity - January 26, 2023) (9)		8,984		8,793		9,074

TMC Merger Sub Corp. (11)	December 22, 2016	Refractory & Maintenance<br>Services Provider
			LIBOR Plus 6.75% (Floor 1.00%), Current Coupon 8.53%, <br>Secured Debt (Maturity - October 31, 2022) (9) (24)		15,527		15,394		15,392

TOMS Shoes, LLC (11)	November 13, 2014	Global Designer,<br> Distributor, and <br>Retailer of Casual<br>Footwear
			LIBOR Plus 5.50% (Floor 1.00%), Current Coupon 7.46%, <br>Secured Debt (Maturity - September 30, 2025) (9)		571		571		571
			LIBOR Plus 5.00% (Floor 1.00%), Current Coupon 6.96%, <br>Secured Debt (Maturity - December 31, 2025) (9)		1,637		1,637		1,637
			Member Units (16,321 units)				245		245
							2,453		2,453

USA DeBusk LLC (10)	October 22, 2019	Provider of Industrial <br>Cleaning Services
			LIBOR Plus 5.75% (Floor 1.00%), Current Coupon 7.54%,<br>Secured Debt (Maturity - October 22, 2024) (9)		30,000		29,423		29,423

U.S. TelePacific Corp. (11)	September 14, 2016	Provider of <br> Communications and <br>Managed Services
			LIBOR Plus 5.00% (Floor 1.00%), Current Coupon 7.02%, <br>Secured Debt (Maturity - May 2, 2023) (9)		17,088		16,887		16,447

Vida Capital, Inc (11)	October 10, 2019	Alternative Asset Manager
			LIBOR Plus 6.00%, Current Coupon 7.93%, <br>Secured Debt (Maturity - October 1, 2026)		18,500		18,232		18,315

VIP Cinema Holdings, Inc. (11)	March 9, 2017	Supplier of Luxury<br>Seating to the Cinema<br>Industry
			LIBOR Plus 8.00% (Floor 1.00%), Current Coupon 9.91%, <br>Secured Debt (Maturity - March 1, 2023) (9) (14)		10,063		10,030		5,301

Vistar Media, Inc. (10)	February 17, 2017	Operator of Digital<br>Out-of-Home<br>Advertising Platform
			LIBOR Plus 8.00% (Floor 1.00%), Current Coupon 10.00%,<br>Secured Debt (Maturity - April 3, 2023) (9)		4,963		4,784		4,939
			Preferred Stock (70,207 shares)				767		1,610
			Warrants (69,675 equivalent shares; Expiration - April <br>3, 2029; Strike price - $10.92 per share)				-		1,630
							5,551		8,179

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)


Portfolio Company (1) (20)	Investment Date (26)	Business Description	Type of Investment (2) (3) (25)	Principal (4)		Cost (4)		Fair Value (18)

Wireless Vision Holdings, LLC (10)	September 29, 2017	Provider of Wireless<br>Telecommunications<br>Carrier Services
			LIBOR Plus 9.65% (Floor 1.00%), Current Coupon 11.57% /<br> 1.00% PIK, Current Coupon Plus PIK 12.57%, Secured Debt <br>(Maturity - September 29, 2022) (9) (19) (23)		7,136		7,022		7,129
			LIBOR Plus 8.91% (Floor 1.00%), Current Coupon 10.67% /<br> 1.00% PIK, Current Coupon Plus PIK 11.67%, Secured Debt <br>(Maturity - September 29, 2022) (9) (19) (23)		6,201		6,132		6,200
							13,154		13,329

YS Garments, LLC (11)	August 22, 2018	Designer and Provider of <br>Branded Activewear
			LIBOR Plus 6.00% (Floor 1.00%), Current Coupon 7.60% <br>Secured Debt (Maturity - August 9, 2024) (9)		14,531		14,412		14,404

Zilliant Incorporated	June 15, 2012	Price Optimization and <br>Margin Management<br>Solutions
			Preferred Stock (186,777 shares)				154		260
			Warrants (952,500 equivalent shares; Expiration - <br>June 15, 2022; Strike price - $0.001 per share)				1,071		1,190
							1,225		1,450
Subtotal Non-Control/Non-Affiliate Investments (80.7% of net assets at fair value)						$	1,297,587	$	1,239,316
Total Portfolio Investments, December 31, 2019						$	2,427,718	$	2,602,324


(1)	All investments are Lower Middle Market portfolio investments, unless otherwise noted. See Note B for a description of Lower Middle Market portfolio investments. All of the Company’s investments, unless otherwise noted, are encumbered either as security for the Company’s Credit Facility or in support of the SBA-guaranteed debentures issued by the Funds.
(2)	Debt investments are income producing, unless otherwise noted. Equity and warrants are non-income producing, unless otherwise noted.
(3)	See Note C and Schedule 12-14 for a summary of geographic location of portfolio companies.
(4)	Principal is net of repayments. Cost is net of repayments and accumulated unearned income.
(5)	Control investments are defined by the Investment Company Act of 1940, as amended ("1940 Act"), as investments in which more than 25% of the voting securities are owned or where the ability to nominate greater than 50% of the board representation is maintained.
(6)	Affiliate investments are defined by the 1940 Act as investments in which between 5% and 25% (inclusive) of the voting securities are owned and the investments are not classified as Control investments.
(7)	Non-Control/Non-Affiliate investments are defined by the 1940 Act as investments that are neither Control investments nor Affiliate investments.
(8)	Income producing through dividends or distributions.
(9)	Index based floating interest rate is subject to contractual minimum interest rate. A majority of the variable rate loans in the Company’s investment portfolio bear interest at a rate that may be determined by reference to either LIBOR or an alternate Base Rate (commonly based on the Federal Funds Rate or the Prime Rate), which typically resets semi-annually, quarterly, or monthly at the borrower’s option. The borrower may also elect to have multiple interest reset periods for each loan. For each such loan, the Company has provided the weighted average annual stated interest rate in effect at December 31, 2019. As noted in this schedule, 64% of the loans (based on the par amount) contain LIBOR floors which range between 0.50% and 2.00%, with a weighted-average LIBOR floor of approximately 1.06%.
(10)	Private Loan portfolio investment. See Note B for a description of Private Loan portfolio investments.
(11)	Middle Market portfolio investment. See Note B for a description of Middle Market portfolio investments.
(12)	Other Portfolio investment. See Note B for a description of Other Portfolio investments.
(13)	Investment is not a qualifying asset as defined under Section 55(a) of the 1940 Act. Qualifying assets must represent at least 70% of total assets at the time of acquisition of any additional non-qualifying assets.

Table of Contents

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments (Continued)

December 31, 2019

(dollars in thousands)

(14)	Non-accrual and non-income producing investment.
(15)	Portfolio company is in a bankruptcy process and, as such, the maturity date of our debt investment in this portfolio company will not be finally determined until such process is complete. As noted in footnote (14), our debt investment in this portfolio company is on non-accrual status.
(16)	External Investment Manager. Investment is not encumbered as security for the Company's Credit Facility or in support of the SBA-guaranteed debentures issued by the Funds.
(17)	Maturity date is under on-going negotiations with the portfolio company and other lenders, if applicable.
(18)	Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C for further discussion.
(19)	PIK interest income and cumulative dividend income represent income not paid currently in cash.
(20)	All portfolio company headquarters are based in the United States, unless otherwise noted.
(21)	Portfolio company headquarters are located outside of the United States.
(22)	In connection with the Company's debt investment in Staples Canada ULC and in an attempt to mitigate any potential adverse change in foreign exchange rates during the term of the Company's investment, the Company maintains a forward foreign currency contract with Cadence Bank to lend $17.6 million Canadian Dollars and receive $13.4 million U.S. Dollars with a settlement date of September 14, 2020. The unrealized depreciation on the forward foreign currency contract is $0.2 million as of December 31, 2019.
(23)	The Company has entered into an intercreditor agreement that entitles the Company to the "last out" tranche of the first lien secured loans, whereby the "first out" tranche will receive priority as to the "last out" tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a higher interest rate than the contractual stated interest rate of LIBOR plus 8.50% (Floor 1.00%) per the credit agreement and the Consolidated Schedule of Investments above reflects such higher rate.
(24)	The Company has entered into an intercreditor agreement that entitles the Company to the "first out" tranche of the first lien secured loans, whereby the "first out" tranche will receive priority as to the "last out" tranche with respect to payments of principal, interest, and any other amounts due thereunder. Therefore, the Company receives a lower interest rate than the contractual stated interest rate of LIBOR plus 7.14% (Floor 1.00%) per the credit agreement and the Consolidated Schedule of Investments above reflects such lower rate.
(25)	All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities.”
(26)	Investment date represents the date of initial investment in the portfolio company.
(27)	Investment has an unfunded commitment as of December 31, 2019 (see Note K). The fair value of the investment includes the impact of the fair value of any unfunded commitments.

Table of Contents MAIN STREET CAPITAL CORPORATION

Notes to Consolidated Financial Statements

(Unaudited)

NOTE A—ORGANIZATION AND BASIS OF PRESENTATION

1. Organization

Main Street Capital Corporation (“MSCC”) is a principal investment firm primarily focused on providing customized debt and equity financing to lower middle market (“LMM”) companies and debt capital to middle market (“Middle Market”) companies. The portfolio investments of MSCC and its consolidated subsidiaries are typically made to support management buyouts, recapitalizations, growth financings, refinancings and acquisitions of companies that operate in a variety of industry sectors. MSCC seeks to partner with entrepreneurs, business owners and management teams and generally provides “one stop” financing alternatives within its LMM portfolio. MSCC and its consolidated subsidiaries invest primarily in secured debt investments, equity investments, warrants and other securities of LMM companies based in the United States and in secured debt investments of Middle Market companies generally headquartered in the United States.

MSCC was formed in March 2007 to operate as an internally managed business development company (“BDC”) under the Investment Company Act of 1940, as amended (the “1940 Act”). MSCC wholly owns several investment funds, including Main Street Mezzanine Fund, LP (“MSMF”), Main Street Capital II, LP (“MSC II”) and Main Street Capital III, LP (“MSC III” and, collectively with MSMF and MSC II, the “Funds”), and each of their general partners. The Funds are each licensed as a Small Business Investment Company (“SBIC”) by the United States Small Business Administration (“SBA”). Because MSCC is internally managed, all of the executive officers and other employees are employed by MSCC. Therefore, MSCC does not pay any external investment advisory fees, but instead directly incurs the operating costs associated with employing investment and portfolio management professionals.

MSC Adviser I, LLC (the “External Investment Manager”) was formed in November 2013 as a wholly owned subsidiary of MSCC to provide investment management and other services to parties other than MSCC and its subsidiaries or their portfolio companies (“External Parties”) and receives fee income for such services. MSCC has been granted no-action relief by the Securities and Exchange Commission (“SEC”) to allow the External Investment Manager to register as a registered investment adviser under the Investment Advisers Act of 1940, as amended. Since the External Investment Manager conducts all of its investment management activities for External Parties, it is accounted for as a portfolio investment of MSCC and is not included as a consolidated subsidiary of MSCC in MSCC’s consolidated financial statements.

MSCC has elected to be treated for U.S. federal income tax purposes as a regulated investment company (“RIC”) under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”). As a result, MSCC generally will not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that it distributes to its stockholders.

MSCC has certain direct and indirect wholly owned subsidiaries that have elected to be taxable entities (the “Taxable Subsidiaries”). The primary purpose of the Taxable Subsidiaries is to permit MSCC to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes.

Unless otherwise noted or the context otherwise indicates, the terms “we,” “us,” “our,” the “Company” and “Main Street” refer to MSCC and its consolidated subsidiaries, which include the Funds and the Taxable Subsidiaries.

2. Basis of Presentation

Main Street’s consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”). The Company is an investment company following accounting and reporting guidance in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 946, Financial Services—Investment Companies (“ASC 946”). For each of the periods presented 51

Table of Contents herein, Main Street’s consolidated financial statements include the accounts of MSCC and its consolidated subsidiaries. The Investment Portfolio, as used herein, refers to all of Main Street’s investments in LMM portfolio companies, investments in Middle Market portfolio companies, private loan (“Private Loan”) portfolio investments, other portfolio (“Other Portfolio”) investments and the investment in the External Investment Manager (see “Note C—Fair Value Hierarchy for Investments and Debentures—Portfolio Composition—Investment Portfolio Composition” for additional discussion of Main Street’s Investment Portfolio). Main Street’s results of operations for the three and nine months ended September 30, 2020 and 2019, cash flows for the nine months ended September 30, 2020 and 2019, and financial position as of September 30, 2020 and December 31, 2019, are presented on a consolidated basis. The effects of all intercompany transactions between Main Street and its consolidated subsidiaries have been eliminated in consolidation.

The accompanying unaudited consolidated financial statements of Main Street are presented in conformity with U.S. GAAP for interim financial information and pursuant to the requirements for reporting on Form 10-Q and Articles 6, 10 and 12 of Regulation S-X. Accordingly, certain disclosures accompanying annual financial statements prepared in accordance with U.S. GAAP are omitted. In the opinion of management, the unaudited consolidated financial results included herein contain all adjustments, consisting solely of normal recurring accruals, considered necessary for the fair presentation of financial statements for the interim periods included herein. The results of operations for the three and nine months ended September 30, 2020 and 2019 are not necessarily indicative of the operating results to be expected for the full year. Also, the unaudited financial statements and notes should be read in conjunction with the audited financial statements and notes thereto for the year ended December 31, 2019. Financial statements prepared on a U.S. GAAP basis require management to make estimates and assumptions that affect the amounts and disclosures reported in the financial statements and accompanying notes. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed herein.

Principles of Consolidation

Under ASC 946, Main Street is precluded from consolidating other entities in which Main Street has equity investments, including those in which it has a controlling interest, unless the other entity is another investment company. An exception to this general principle in ASC 946 occurs if Main Street holds a controlling interest in an operating company that provides all or substantially all of its services directly to Main Street or to its portfolio companies. Accordingly, as noted above, MSCC’s consolidated financial statements include the financial position and operating results for the Funds and the Taxable Subsidiaries. Main Street has determined that none of its portfolio investments qualify for this exception, including the investment in the External Investment Manager. Therefore, Main Street’s Investment Portfolio is carried on the consolidated balance sheet at fair value, as discussed further in Note B.1., with any adjustments to fair value recognized as “Net Unrealized Appreciation (Depreciation)” on the consolidated statements of operations until the investment is realized, usually upon exit, resulting in any gain or loss being recognized as a “Net Realized Gain (Loss).”

Portfolio Investment Classification

Main Street classifies its Investment Portfolio in accordance with the requirements of the 1940 Act. Under the 1940 Act, (a) “Control Investments” are defined as investments in which Main Street owns more than 25% of the voting securities or has rights to maintain greater than 50% of the board representation, (b) “Affiliate Investments” are defined as investments in which Main Street owns between 5% and 25% (inclusive) of the voting securities and does not have rights to maintain greater than 50% of the board representation, and (c) “Non-Control/Non-Affiliate Investments” are defined as investments that are neither Control Investments nor Affiliate Investments.

NOTE B—SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

1. Valuation of the Investment Portfolio

Main Street accounts for its Investment Portfolio at fair value. As a result, Main Street follows the provisions of ASC 820, Fair Value Measurements and Disclosures (“ASC 820”). ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value and enhances disclosure requirements for fair value measurements. ASC 820 requires Main Street to assume that the portfolio investment is to be sold in the principal market to independent market participants, which may be a 52

Table of Contents hypothetical market. Market participants are defined as buyers and sellers in the principal market that are independent, knowledgeable and willing and able to transact.

Main Street’s portfolio strategy calls for it to invest primarily in illiquid debt and equity securities issued by privately held, LMM companies and more liquid debt securities issued by Middle Market companies that are generally larger in size than the LMM companies. Main Street categorizes some of its investments in LMM companies and Middle Market companies as Private Loan portfolio investments, which are primarily debt securities in privately held companies that have been originated through strategic relationships with other investment funds on a collaborative basis, and are often referred to in the debt markets as “club deals.” Private Loan investments are typically similar in size, structure, terms and conditions to investments Main Street holds in its LMM portfolio and Middle Market portfolio. Main Street’s portfolio also includes Other Portfolio investments which primarily consist of investments that are not consistent with the typical profiles for its LMM portfolio investments, Middle Market portfolio investments or Private Loan portfolio investments, including investments which may be managed by third parties. Main Street’s portfolio investments may be subject to restrictions on resale.

LMM investments and Other Portfolio investments generally have no established trading market while Middle Market securities generally have established markets that are not active. Private Loan investments may include investments which have no established trading market or have established markets that are not active. Main Street determines in good faith the fair value of its Investment Portfolio pursuant to a valuation policy in accordance with ASC 820 and a valuation process approved by its Board of Directors and in accordance with the 1940 Act. Main Street’s valuation policies and processes are intended to provide a consistent basis for determining the fair value of Main Street’s Investment Portfolio.

For LMM portfolio investments, Main Street generally reviews external events, including private mergers, sales and acquisitions involving comparable companies, and includes these events in the valuation process by using an enterprise value waterfall methodology (“Waterfall”) for its LMM equity investments and an income approach using a yield-to-maturity model (“Yield-to-Maturity”) for its LMM debt investments. For Middle Market portfolio investments, Main Street primarily uses quoted prices in the valuation process. Main Street determines the appropriateness of the use of third-party broker quotes, if any, in determining fair value based on its understanding of the level of actual transactions used by the broker to develop the quote and whether the quote was an indicative price or binding offer, the depth and consistency of broker quotes and the correlation of changes in broker quotes with underlying performance of the portfolio company and other market indices. For Middle Market and Private Loan portfolio investments in debt securities for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value the investment in a current hypothetical sale using the Yield-to-Maturity valuation method. For its Other Portfolio equity investments, Main Street generally calculates the fair value of the investment primarily based on the net asset value (“NAV”) of the fund and adjusts the fair value for other factors deemed relevant that would affect the fair value of the investment. All of the valuation approaches for Main Street’s portfolio investments estimate the value of the investment as if Main Street were to sell, or exit, the investment as of the measurement date.

These valuation approaches consider the value associated with Main Street’s ability to control the capital structure of the portfolio company, as well as the timing of a potential exit. For valuation purposes, “control” portfolio investments are composed of debt and equity securities in companies for which Main Street has a controlling interest in the equity ownership of the portfolio company or the ability to nominate a majority of the portfolio company’s board of directors. For valuation purposes, “non-control” portfolio investments are generally composed of debt and equity securities in companies for which Main Street does not have a controlling interest in the equity ownership of the portfolio company or the ability to nominate a majority of the portfolio company’s board of directors.

Under the Waterfall valuation method, Main Street estimates the enterprise value of a portfolio company using a combination of market and income approaches or other appropriate valuation methods, such as considering recent transactions in the equity securities of the portfolio company or third-party valuations of the portfolio company, and then performs a waterfall calculation by allocating the enterprise value over the portfolio company’s securities in order of their preference relative to one another. The enterprise value is the fair value at which an enterprise could be sold in a transaction between two willing parties, other than through a forced or liquidation sale. Typically, privately held companies are bought and sold based on multiples of earnings before interest, taxes, depreciation and amortization (“EBITDA”), cash flows, net income, revenues, or in limited cases, book value. There is no single methodology for 53

Table of Contents estimating enterprise value. For any one portfolio company, enterprise value is generally described as a range of values from which a single estimate of enterprise value is derived. In estimating the enterprise value of a portfolio company, Main Street analyzes various factors including the portfolio company’s historical and projected financial results. Due to SEC deadlines for Main Street’s quarterly and annual financial reporting, the operating results of a portfolio company used in the current period valuation are generally the results from the period ended three months prior to such valuation date and may include unaudited, projected, budgeted or pro forma financial information and may require adjustments for non-recurring items or to normalize the operating results that may require significant judgment in determining. In addition, projecting future financial results requires significant judgment regarding future growth assumptions. In evaluating the operating results, Main Street also analyzes the impact of exposure to litigation, loss of customers or other contingencies. After determining the appropriate enterprise value, Main Street allocates the enterprise value to investments in order of the legal priority of the various components of the portfolio company’s capital structure. In applying the Waterfall valuation method, Main Street assumes the loans are paid off at the principal amount in a change in control transaction and are not assumed by the buyer, which Main Street believes is consistent with its past transaction history and standard industry practices.

Under the Yield-to-Maturity valuation method, Main Street also uses the income approach to determine the fair value of debt securities based on projections of the discounted future free cash flows that the debt security will likely generate, including analyzing the discounted cash flows of interest and principal amounts for the debt security, as set forth in the associated loan agreements, as well as the financial position and credit risk of the portfolio company. Main Street’s estimate of the expected repayment date of its debt securities is generally the maturity date of the instrument, as Main Street generally intends to hold its loans and debt securities to maturity. The Yield-to-Maturity analysis also considers changes in leverage levels, credit quality, portfolio company performance and other factors. Main Street will generally use the value determined by the Yield-to-Maturity analysis as the fair value for that security; however, because of Main Street’s general intent to hold its loans to maturity, the fair value will not exceed the principal amount of the debt security valued using the Yield-to-Maturity valuation method. A change in the assumptions that Main Street uses to estimate the fair value of its debt securities using the Yield-to-Maturity valuation method could have a material impact on the determination of fair value. If there is deterioration in credit quality or if a debt security is in workout status, Main Street may consider other factors in determining the fair value of the debt security, including the value attributable to the debt security from the enterprise value of the portfolio company or the proceeds that would most likely be received in a liquidation analysis.

Under the NAV valuation method, for an investment in an investment fund that does not have a readily determinable fair value, Main Street measures the fair value of the investment predominately based on the NAV of the investment fund as of the measurement date and adjusts the investment’s fair value for factors known to Main Street that would affect that fund’s NAV, including, but not limited to, fair values for individual investments held by the fund if Main Street holds the same investment or for a publicly traded investment. In addition, in determining the fair value of the investment, Main Street considers whether adjustments to the NAV are necessary in certain circumstances, based on the analysis of any restrictions on redemption of Main Street’s investment as of the measurement date, recent actual sales or redemptions of interests in the investment fund, and expected future cash flows available to equity holders, including the rate of return on those cash flows compared to an implied market return on equity required by market participants, or other uncertainties surrounding Main Street’s ability to realize the full NAV of its interests in the investment fund.

Pursuant to its internal valuation process and the requirements under the 1940 Act, Main Street performs valuation procedures on each of its portfolio investments quarterly. In addition to its internal valuation process, in arriving at estimates of fair value for its investments in its LMM portfolio companies, Main Street, among other things, consults with a nationally recognized independent financial advisory services firm. The nationally recognized independent financial advisory services firm analyzes and provides observations, recommendations and an assurance certification regarding the Company’s determinations of the fair value of its LMM portfolio company investments. The nationally recognized independent financial advisory services firm is generally consulted relative to Main Street’s investments in each LMM portfolio company at least once every calendar year, and for Main Street’s investments in new LMM portfolio companies, at least once in the twelve-month period subsequent to the initial investment. In certain instances, Main Street may determine that it is not cost-effective, and as a result is not in its stockholders’ best interest, to consult with the nationally recognized independent financial advisory services firm on its investments in one or more LMM portfolio companies. Such instances include, but are not limited to, situations where the fair value of Main Street’s investment in a LMM portfolio company is determined to be insignificant relative to the total Investment Portfolio. Main Street consulted with and received an assurance certification from its independent financial advisory services firm in arriving at Main Street’s determination of fair value on its investments in a total of 40 LMM portfolio companies for the 54

Table of Contents nine months ended September 30, 2020, representing approximately 64% of the total LMM portfolio at fair value as of September 30, 2020, and on a total of 40 LMM portfolio companies for the nine months ended September 30, 2019, representing approximately 66% of the total LMM portfolio at fair value as of September 30, 2019. Excluding its investments in LMM portfolio companies that, as of September 30, 2020 and 2019, as applicable, had not been in the Investment Portfolio for at least twelve months subsequent to the initial investment or whose primary purpose is to own real estate for which a third-party appraisal is obtained on at least an annual basis, the percentage of the LMM portfolio reviewed and certified by its independent financial advisory services firm for the nine months ended September 30, 2020 and 2019 was 69% of the total LMM portfolio at fair value as of both September 30, 2020 and 2019.

For valuation purposes, all of Main Street’s Middle Market portfolio investments are non-control investments. To the extent sufficient observable inputs are available to determine fair value, Main Street uses observable inputs to determine the fair value of these investments through obtaining third-party quotes or other independent pricing. For Middle Market portfolio investments for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value such Middle Market debt investments in a current hypothetical sale using the Yield-to-Maturity valuation method and such Middle Market equity investments in a current hypothetical sale using the Waterfall valuation method. Because the vast majority of the Middle Market portfolio investments are typically valued using third-party quotes or other independent pricing services (including 92% and 91% of the Middle Market portfolio investments as of September 30, 2020 and December 31, 2019, respectively), Main Street generally does not consult with any financial advisory services firms in connection with determining the fair value of its Middle Market investments.

For valuation purposes, all of Main Street’s Private Loan portfolio investments are non-control investments. For Private Loan portfolio investments for which it has determined that third-party quotes or other independent pricing are not available or appropriate, Main Street generally estimates the fair value based on the assumptions that it believes hypothetical market participants would use to value such Private Loan debt investments in a current hypothetical sale using the Yield-to-Maturity valuation method and such Private Loan equity investments in a current hypothetical sale using the Waterfall valuation method.

In addition to its internal valuation process, in arriving at estimates of fair value for its investments in its Private Loan portfolio companies, Main Street, among other things, consults with a nationally recognized independent financial advisory services firm. The nationally recognized independent financial advisory services firm analyzes and provides observations and recommendations and an assurance certification regarding the Company’s determinations of the fair value of its Private Loan portfolio company investments. The nationally recognized independent financial advisory services firm is generally consulted relative to Main Street’s investments in each Private Loan portfolio company at least once every calendar year, and for Main Street’s investments in new Private Loan portfolio companies, at least once in the twelve-month period subsequent to the initial investment. In certain instances, Main Street may determine that it is not cost-effective, and as a result is not in its stockholders’ best interest, to consult with the nationally recognized independent financial advisory services firm on its investments in one or more Private Loan portfolio companies. Such instances include, but are not limited to, situations where the fair value of Main Street’s investment in a Private Loan portfolio company is determined to be insignificant relative to the total Investment Portfolio. Main Street consulted with and received an assurance certification from its independent financial advisory services firm in arriving at its determination of fair value on its investments in a total of 31 Private Loan portfolio companies for the nine months ended September 30, 2020, representing approximately 53% of the total Private Loan portfolio at fair value as of September 30, 2020, and on a total of 27 Private Loan portfolio companies for the nine months ended September 30, 2019, representing approximately 51% of the total Private Loan portfolio at fair value as of September 30, 2019. Excluding its investments in Private Loan portfolio companies that, as of September 30, 2020 and 2019, as applicable, had not been in the Investment Portfolio for at least twelve months subsequent to the initial investment and its investments in Private Loan portfolio companies that were not reviewed because the investment is valued based upon third-party quotes or other independent pricing, the percentage of the Private Loan portfolio reviewed and certified by its independent financial advisory services firm for the nine months ended September 30, 2020 and 2019 was 71% and 78% of the total Private Loan portfolio at fair value as of September 30, 2020 and 2019, respectively.

For valuation purposes, all of Main Street’s Other Portfolio investments are non-control investments. Main Street’s Other Portfolio investments comprised 3.9% and 4.1% of Main Street’s Investment Portfolio at fair value as of September 30, 2020 and December 31, 2019, respectively. Similar to the LMM investment portfolio, market quotations 55

Table of Contents for Other Portfolio equity investments are generally not readily available. For its Other Portfolio equity investments, Main Street generally determines the fair value of these investments using the NAV valuation method.

For valuation purposes, Main Street’s investment in the External Investment Manager is a control investment. Market quotations are not readily available for this investment, and as a result, Main Street determines the fair value of the External Investment Manager using the Waterfall valuation method under the market approach. In estimating the enterprise value, Main Street analyzes various factors, including the entity’s historical and projected financial results, as well as its size, marketability and performance relative to the population of market comparables. This valuation approach estimates the value of the investment as if Main Street were to sell, or exit, the investment. In addition, Main Street considers its ability to control the capital structure of the company, as well as the timing of a potential exit, in connection with determining the fair value of the External Investment Manager.

Due to the inherent uncertainty in the valuation process, Main Street’s determination of fair value for its Investment Portfolio may differ materially from the values that would have been determined had a ready market for the securities existed. In addition, changes in the market environment, portfolio company performance and other events that may occur over the lives of the investments may cause the gains or losses ultimately realized on these investments to be materially different than the valuations currently assigned. Main Street determines the fair value of each individual investment and records changes in fair value as unrealized appreciation or depreciation.

Main Street uses an internally developed portfolio investment rating system in connection with its investment oversight, portfolio management and analysis and investment valuation procedures for its LMM portfolio companies. This system takes into account both quantitative and qualitative factors of the LMM portfolio company and the investments held therein.

The Board of Directors of Main Street has the final responsibility for overseeing, reviewing and approving, in good faith, Main Street’s determination of the fair value for its Investment Portfolio, as well as its valuation procedures, consistent with 1940 Act requirements. Main Street believes its Investment Portfolio as of September 30, 2020 and December 31, 2019 approximates fair value as of those dates based on the markets in which Main Street operates and other conditions in existence on those reporting dates.

2. Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period. Actual results may differ from these estimates under different conditions or assumptions. Additionally, as explained in Note B.1., the consolidated financial statements include investments in the Investment Portfolio whose values have been estimated by Main Street with the oversight, review and approval by Main Street’s Board of Directors in the absence of readily ascertainable market values. Because of the inherent uncertainty of the Investment Portfolio valuations, those estimated values may differ materially from the values that would have been determined had a ready market for the securities existed.

The COVID-19 pandemic, and the related effect on the U.S. and global economies, has impacted, and threatens to continue to impact, the businesses and operating results of certain of Main Street’s portfolio companies, as well as market interest spreads. As a result of these and other current effects of the COVID-19 pandemic, as well as the uncertainty regarding the extent and duration of its impact, the valuation of Main Street’s Investment Portfolio is volatile.

3. Cash and Cash Equivalents

Cash and cash equivalents consist of cash and highly liquid investments with an original maturity of three months or less at the date of purchase. Cash and cash equivalents are carried at cost, which approximates fair value.

At September 30, 2020, cash balances totaling $24.1 million exceeded Federal Deposit Insurance Corporation insurance protection levels, subjecting the Company to risk related to the uninsured balance. All of the Company’s cash 56

Table of Contents deposits are held at large established high credit quality financial institutions and management believes that the risk of loss associated with any uninsured balances is remote.

4. Interest, Dividend and Fee Income

Main Street records interest and dividend income on the accrual basis to the extent amounts are expected to be collected. Dividend income is recorded as dividends are declared by the portfolio company or at the point an obligation exists for the portfolio company to make a distribution. In accordance with Main Street’s valuation policies, Main Street evaluates accrued interest and dividend income periodically for collectability. When a loan or debt security becomes 90 days or more past due, and if Main Street otherwise does not expect the debtor to be able to service all of its debt or other obligations, Main Street will generally place the loan or debt security on non-accrual status and cease recognizing interest income on that loan or debt security until the borrower has demonstrated the ability and intent to pay contractual amounts due. If a loan or debt security’s status significantly improves regarding the debtor’s ability to service the debt or other obligations, or if a loan or debt security is sold or written off, Main Street removes it from non-accrual status.

As of September 30, 2020, Main Street’s total Investment Portfolio had twelve investments on non-accrual status, which comprised approximately 2.6% of its fair value and 7.1% of its cost. As of December 31, 2019, Main Street’s total Investment Portfolio had eight investments on non-accrual status, which comprised approximately 1.4% of its fair value and 4.8% of its cost.

Main Street holds certain debt and preferred equity instruments in its Investment Portfolio that contain payment-in-kind (“PIK”) interest and cumulative dividend provisions. The PIK interest, computed at the contractual rate specified in each debt agreement, is periodically added to the principal balance of the debt and is recorded as interest income. Thus, the actual collection of this interest may be deferred until the time of debt principal repayment. Cumulative dividends are recorded as dividend income, and any dividends in arrears are added to the balance of the preferred equity investment. The actual collection of these dividends in arrears may be deferred until such time as the preferred equity is redeemed or sold. To maintain RIC tax treatment (as discussed in Note B.9. below), these non-cash sources of income may need to be paid out to stockholders in the form of distributions, even though Main Street may not have collected the PIK interest and cumulative dividends in cash. For the three months ended September 30, 2020 and 2019, (i) approximately 3.7% and 1.6%, respectively, of Main Street’s total investment income was attributable to PIK interest income not paid currently in cash and (ii) approximately 0.7% and 1.0%, respectively, of Main Street’s total investment income was attributable to cumulative dividend income not paid currently in cash. For the nine months ended September 30, 2020 and 2019, (i) approximately 2.4% and 1.9%, respectively, of Main Street’s total investment income was attributable to PIK interest income not paid currently in cash and (ii) approximately 0.9% and 1.1%, respectively, of Main Street’s total investment income was attributable to cumulative dividend income not paid currently in cash. Main Street stops accruing PIK interest and cumulative dividends and writes off any accrued and uncollected interest and dividends in arrears when it determines that such PIK interest and dividends in arrears are no longer collectible.

Main Street may periodically provide services, including structuring and advisory services, to its portfolio companies or other third parties. For services that are separately identifiable and evidence exists to substantiate fair value, fee income is recognized as earned, which is generally when the investment or other applicable transaction closes. Fees received in connection with debt financing transactions for services that do not meet these criteria are treated as debt origination fees and are deferred and accreted into income over the life of the financing.

A presentation of total investment income Main Street received from its Investment Portfolio in each of the periods presented is as follows:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2020		2019		2020		2019
	(dollars in thousands)
Interest, fee and dividend income:
Interest income	$	42,138	$	46,192	$	128,587	$	140,732
Dividend income		8,106		12,492		23,942		37,751
Fee income		1,710		1,384		7,580		4,241
Total interest, fee and dividend income	$	51,954	$	60,068	$	160,109	$	182,724

Table of Contents 5. Deferred Financing Costs

Deferred financing costs include commitment fees and other costs related to Main Street’s multi-year revolving credit facility (the “Credit Facility”) and its unsecured notes, as well as the commitment fees and leverage fees (approximately 3.4% of the total commitment and draw amounts, as applicable) on the SBIC debentures, which are not accounted for under the fair value option under ASC 825 (as discussed further in Note B.11.). See further discussion of Main Street’s debt in Note E. Deferred financing costs in connection with the Credit Facility are capitalized as an asset. Deferred financing costs in connection with all other debt arrangements not using the fair value option are a direct deduction from the related debt liability.

6. Equity Offering Costs

The Company’s offering costs are charged against the proceeds from equity offerings when the proceeds are received.

7. Unearned Income—Debt Origination Fees and Original Issue Discount and Discounts / Premiums to Par Value

Main Street capitalizes debt origination fees received in connection with financings and reflects such fees as unearned income netted against the applicable debt investments. The unearned income from the fees is accreted into income based on the effective interest method over the life of the financing.

In connection with its portfolio debt investments, Main Street sometimes receives nominal cost warrants or warrants with an exercise price below the fair value of the underlying equity (together, “nominal cost equity”) that are valued as part of the negotiation process with the particular portfolio company. When Main Street receives nominal cost equity, Main Street allocates its cost basis in its investment between its debt security and its nominal cost equity at the time of origination based on amounts negotiated with the particular portfolio company. The allocated amounts are based upon the fair value of the nominal cost equity, which is then used to determine the allocation of cost to the debt security. Any discount recorded on a debt investment resulting from this allocation is reflected as unearned income, which is netted against the applicable debt investment, and accreted into interest income based on the effective interest method over the life of the debt investment. The actual collection of this interest is deferred until the time of debt principal repayment.

Main Street may also purchase debt securities at a discount or at a premium to the par value of the debt security. In the case of a purchase at a discount, Main Street records the investment at the par value of the debt security net of the discount, and the discount is accreted into interest income based on the effective interest method over the life of the debt investment. In the case of a purchase at a premium, Main Street records the investment at the par value of the debt security plus the premium, and the premium is amortized as a reduction to interest income based on the effective interest method over the life of the debt investment.

To maintain RIC tax treatment (as discussed in Note B.9. below), these non-cash sources of income may need to be paid out to stockholders in the form of distributions, even though Main Street may not have collected the interest income. For the three months ended September 30, 2020 and 2019, approximately 3.3% and 2.6%, respectively, of Main Street’s total investment income was attributable to interest income from the accretion of discounts associated with debt investments, net of any premium reduction. For the nine months ended September 30, 2020 and 2019, approximately 2.8% and 2.6%, respectively, of Main Street’s total investment income was attributable to interest income from the accretion of discounts associated with debt investments, net of any premium reduction.

8. Share-Based Compensation

Main Street accounts for its share-based compensation plans using the fair value method, as prescribed by ASC 718, Compensation—Stock Compensation. Accordingly, for restricted stock awards, Main Street measures the grant date fair value based upon the market price of its common stock on the date of the grant and amortizes the fair value of the awards as share-based compensation expense over the requisite service period, which is generally the vesting term. 58

Table of Contents Main Street has also adopted Accounting Standards Update (“ASU”) 2016-09, Compensation—Stock Compensation: Improvements to Employee Share-Based Payment Accounting, which requires that all excess tax benefits and tax deficiencies (including tax benefits of dividends on share-based payment awards) be recognized as income tax expense or benefit in the income statement and not delay recognition of a tax benefit until the tax benefit is realized through a reduction to taxes payable. Accordingly, the tax effects of exercised or vested awards are treated as discrete items in the reporting period in which they occur. Additionally, Main Street has elected to account for forfeitures as they occur.

9. Income Taxes

MSCC has elected to be treated for U.S. federal income tax purposes as a RIC. MSCC’s taxable income includes the taxable income generated by MSCC and certain of its subsidiaries, including the Funds, which are treated as disregarded entities for tax purposes. As a RIC, MSCC generally will not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that MSCC distributes to its stockholders. MSCC must generally distribute at least 90% of its “investment company taxable income” (which is generally its net ordinary taxable income and realized net short-term capital gains in excess of realized net long-term capital losses) and 90% of its tax-exempt income to maintain its RIC status (pass-through tax treatment for amounts distributed). As part of maintaining RIC status, undistributed taxable income (subject to a 4% non-deductible U.S. federal excise tax) pertaining to a given fiscal year may be distributed up to 12 months subsequent to the end of that fiscal year, provided such dividends are declared on or prior to the later of (i) the filing of the U.S. federal income tax return for the applicable fiscal year or (ii) the fifteenth day of the ninth month following the close of the year in which such taxable income was generated.

The Taxable Subsidiaries primarily hold certain portfolio investments for Main Street. The Taxable Subsidiaries permit Main Street to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes and to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The Taxable Subsidiaries are consolidated with Main Street for U.S. GAAP financial reporting purposes, and the portfolio investments held by the Taxable Subsidiaries are included in Main Street’s consolidated financial statements as portfolio investments and recorded at fair value. The Taxable Subsidiaries are not consolidated with MSCC for income tax purposes and may generate income tax expense, or benefit, and tax assets and liabilities, as a result of their ownership of certain portfolio investments. The taxable income, or loss, of the Taxable Subsidiaries may differ from their book income, or loss, due to temporary book and tax timing differences and permanent differences. The Taxable Subsidiaries are each taxed at their normal corporate tax rates based on their taxable income. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the Taxable Subsidiaries are reflected in Main Street’s consolidated financial statements.

The External Investment Manager is an indirect wholly owned subsidiary of MSCC owned through a Taxable Subsidiary and is a disregarded entity for tax purposes. The External Investment Manager has entered into a tax sharing agreement with its Taxable Subsidiary owner. Since the External Investment Manager is accounted for as a portfolio investment of MSCC and is not included as a consolidated subsidiary of MSCC in MSCC’s consolidated financial statements, and as a result of the tax sharing agreement with its Taxable Subsidiary owner, for its stand-alone financial reporting purposes the External Investment Manager is treated as if it is taxed at normal corporate tax rates based on its taxable income and, as a result of its activities, may generate income tax expense or benefit. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the External Investment Manager are reflected in the External Investment Manager’s separate financial statements.

The Taxable Subsidiaries and the External Investment Manager use the liability method in accounting for income taxes. Deferred tax assets and liabilities are recorded for temporary differences between the tax basis of assets and liabilities and their reported amounts in the consolidated financial statements, using statutory tax rates in effect for the year in which the temporary differences are expected to reverse. A valuation allowance is provided, if necessary, against deferred tax assets when it is more likely than not that some portion or all of the deferred tax asset will not be realized.

Taxable income generally differs from net income for financial reporting purposes due to temporary and permanent differences in the recognition of income and expenses. Taxable income generally excludes net unrealized appreciation or depreciation, as investment gains or losses are not included in taxable income until they are realized. 59

Table of Contents 10. Net Realized Gains or Losses and Net Unrealized Appreciation or Depreciation

Realized gains or losses are measured by the difference between the net proceeds from the sale or redemption of an investment or a financial instrument and the cost basis of the investment or financial instrument, without regard to unrealized appreciation or depreciation previously recognized, and includes investments written-off during the period net of recoveries and realized gains or losses from in-kind redemptions. Net unrealized appreciation or depreciation reflects the net change in the fair value of the Investment Portfolio and financial instruments and the reclassification of any prior period unrealized appreciation or depreciation on exited investments and financial instruments to realized gains or losses.

11. Fair Value of Financial Instruments

Fair value estimates are made at discrete points in time based on relevant information. These estimates may be subjective in nature and involve uncertainties and matters of significant judgment and, therefore, cannot be determined with precision. Main Street believes that the carrying amounts of its financial instruments, consisting of cash and cash equivalents, receivables, payables and other liabilities approximate the fair values of such items due to the short-term nature of these instruments.

As part of Main Street’s acquisition of the majority of the equity interests of MSC II in January 2010 (the “MSC II Acquisition”), Main Street elected the fair value option under ASC 825, Financial Instruments (“ASC 825”), relating to accounting for debt obligations at their fair value, for the MSC II SBIC debentures acquired as part of the acquisition accounting related to the MSC II Acquisition and valued those obligations as discussed further in Note C. In order to provide for a more consistent basis of presentation, Main Street elected the fair value option for SBIC debentures issued by MSC II subsequent to the MSC II Acquisition. When the fair value option is elected for a given SBIC debenture, the deferred loan costs associated with the debenture are fully expensed in the current period to “Net Unrealized Appreciation (Depreciation)—SBIC debentures” as part of the fair value adjustment. Interest incurred in connection with SBIC debentures which are valued at fair value is included in interest expense.

12. Earnings per Share

Basic and diluted per share calculations are computed utilizing the weighted-average number of shares of common stock outstanding for the period. In accordance with ASC 260, Earnings Per Share, the unvested shares of restricted stock awarded pursuant to Main Street’s equity compensation plans are participating securities and, therefore, are included in the basic earnings per share calculation. As a result, for all periods presented, there is no difference between diluted earnings per share and basic earnings per share amounts.

13. Recently Issued or Adopted Accounting Standards

In March 2020, the FASB issued ASU 2020-04, “Reference rate reform (Topic 848)—Facilitation of the effects of reference rate reform on financial reporting.” The amendments in this update provide optional expedients and exceptions for applying U.S. GAAP to certain contracts and hedging relationships that reference LIBOR or another reference rate expected to be discontinued due to reference rate reform and became effective upon issuance for all entities. The Company has agreements that have LIBOR as a reference rate with certain portfolio companies and also with certain lenders. Many of these agreements include language for choosing an alternative successor rate if LIBOR reference is no longer considered to be appropriate. Contract modifications are required to be evaluated in determining whether the modifications result in the establishment of new contracts or the continuation of existing contracts. The Company adopted this amendment in March 2020 and plans to apply the amendments in this update to account for contract modifications due to changes in reference rates. The Company continues to evaluate the impact that the amendments in this update will have on its consolidated financial statements and disclosures when applied.

In May 2020, the SEC published Release No. 33-10786 (the “Release”), Amendments to Financial Disclosures about Acquired and Disposed Businesses, announcing its adoption of rules amending Rule 1-02(w)(2) used in the determination of a significant subsidiary specific to investment companies, including BDCs. In part, the rules adopted pursuant to the Release eliminated the use of the asset test, and amended the income and investment tests for determining whether an unconsolidated subsidiary requires additional disclosure in the footnotes of the financial 60

Table of Contents statements. Main Street adopted the rules adopted pursuant to the Release during the quarter ended June 30, 2020. The impact of the adoption of these rules on Main Street’s consolidated financial statements was not material.

From time to time, new accounting pronouncements are issued by the FASB or other standards setting bodies that are adopted by Main Street as of the specified effective date. Main Street believes that the impact of recently issued standards and any that are not yet effective will not have a material impact on its consolidated financial statements upon adoption.

NOTE C—FAIR VALUE HIERARCHY FOR INVESTMENTS AND DEBENTURES—PORTFOLIO COMPOSITION

ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value, and enhances disclosure requirements for fair value measurements. Main Street accounts for its investments at fair value.

Fair Value Hierarchy

In accordance with ASC 820, Main Street has categorized its investments based on the priority of the inputs to the valuation technique into a three-level fair value hierarchy. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical investments (Level 1) and the lowest priority to unobservable inputs (Level 3).

Investments recorded on Main Street’s balance sheet are categorized based on the inputs to the valuation techniques as follows:

Level 1—Investments whose values are based on unadjusted quoted prices for identical assets in an active market that Main Street has the ability to access (examples include investments in active exchange-traded equity securities and investments in most U.S. government and agency securities).

Level 2—Investments whose values are based on quoted prices in markets that are not active or model inputs that are observable either directly or indirectly for substantially the full term of the investment. Level 2 inputs include the following:

●	Quoted prices for similar assets in active markets (for example, investments in restricted stock);
●	Quoted prices for identical or similar assets in non-active markets (for example, investments in thinly traded public companies);
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●	Pricing models whose inputs are observable for substantially the full term of the investment (for example, market interest rate indices); and
---	---
●	Pricing models whose inputs are derived principally from, or corroborated by, observable market data through correlation or other means for substantially the full term of the investment.
---	---

Level 3—Investments whose values are based on prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement (for example, investments in illiquid securities issued by privately held companies). These inputs reflect management’s own assumptions about the assumptions a market participant would use in pricing the investment.

As required by ASC 820, when the inputs used to measure fair value fall within different levels of the hierarchy, the level within which the fair value measurement is categorized is based on the lowest level input that is significant to the fair value measurement in its entirety. For example, a Level 3 fair value measurement may include inputs that are observable (Levels 1 and 2) and unobservable (Level 3). Therefore, unrealized appreciation and depreciation related to such investments categorized within the Level 3 tables below may include changes in fair value that are attributable to both observable inputs (Levels 1 and 2) and unobservable inputs (Level 3). 61

Table of Contents As of September 30, 2020 and December 31, 2019, all of Main Street’s LMM portfolio investments consisted of illiquid securities issued by privately held companies and the fair value determination for these investments primarily consisted of unobservable inputs. As a result, all of Main Street’s LMM portfolio investments were categorized as Level 3 as of September 30, 2020 and December 31, 2019.

As of September 30, 2020 and December 31, 2019, Main Street’s Middle Market portfolio investments consisted primarily of investments in secured and unsecured debt investments and independently rated debt investments. The fair value determination for these investments consisted of a combination of observable inputs in non-active markets for which sufficient observable inputs were not available to determine the fair value of these investments and unobservable inputs. As a result, all of Main Street’s Middle Market portfolio investments were categorized as Level 3 as of September 30, 2020 and December 31, 2019.

As of September 30, 2020 and December 31, 2019, Main Street’s Private Loan portfolio investments primarily consisted of investments in interest-bearing secured debt investments. The fair value determination for these investments consisted of a combination of observable inputs in non-active markets for which sufficient observable inputs were not available to determine the fair value of these investments and unobservable inputs. As a result, all of Main Street’s Private Loan portfolio investments were categorized as Level 3 as of September 30, 2020 and December 31, 2019.

As of September 30, 2020 and December 31, 2019, Main Street’s Other Portfolio investments consisted of illiquid securities issued by privately held companies and the fair value determination for these investments primarily consisted of unobservable inputs. As a result, all of Main Street’s Other Portfolio investments were categorized as Level 3 as of September 30, 2020 and December 31, 2019.

The fair value determination of each portfolio investment categorized as Level 3 required one or more of the following unobservable inputs:

●	Financial information obtained from each portfolio company, including unaudited statements of operations and balance sheets for the most recent period available as compared to budgeted numbers;
●	Current and projected financial condition of the portfolio company;
---	---
●	Current and projected ability of the portfolio company to service its debt obligations;
---	---
●	Type and amount of collateral, if any, underlying the investment;
---	---
●	Current financial ratios (e.g., fixed charge coverage ratio, interest coverage ratio and net debt/EBITDA ratio) applicable to the investment;
---	---
●	Current liquidity of the investment and related financial ratios (e.g., current ratio and quick ratio);
---	---
●	Pending debt or capital restructuring of the portfolio company;
---	---
●	Projected operating results of the portfolio company;
---	---
●	Current information regarding any offers to purchase the investment;
---	---
●	Current ability of the portfolio company to raise any additional financing as needed;
---	---
●	Changes in the economic environment which may have a material impact on the operating results of the portfolio company;
---	---
●	Internal occurrences that may have an impact (both positive and negative) on the operating performance of the portfolio company;
---	---

Table of Contents

●	Qualitative assessment of key management;
●	Contractual rights, obligations or restrictions associated with the investment; and
---	---
●	Other factors deemed relevant.
---	---

The use of significant unobservable inputs creates uncertainty in the measurement of fair value as of the reporting date. The significant unobservable inputs used in the fair value measurement of Main Street’s LMM equity securities, which are generally valued through an average of the discounted cash flow technique and the market comparable/enterprise value technique (unless one of these approaches is determined to not be appropriate), are (i) EBITDA multiples and (ii) the weighted-average cost of capital (“WACC”). Significant increases (decreases) in EBITDA multiple inputs in isolation would result in a significantly higher (lower) fair value measurement. On the contrary, significant increases (decreases) in WACC inputs in isolation would result in a significantly lower (higher) fair value measurement. The significant unobservable inputs used in the fair value measurement of Main Street’s LMM, Middle Market and Private Loan securities are (i) risk adjusted discount rates used in the Yield-to-Maturity valuation technique (see “Note B.1.—Valuation of the Investment Portfolio”) and (ii) the percentage of expected principal recovery. Significant increases (decreases) in any of these discount rates in isolation would result in a significantly lower (higher) fair value measurement. Significant increases (decreases) in any of these expected principal recovery percentages in isolation would result in a significantly higher (lower) fair value measurement. However, due to the nature of certain investments, fair value measurements may be based on other criteria, such as third-party appraisals of collateral and fair values as determined by independent third parties, which are not presented in the tables below.

The following tables provide a summary of the significant unobservable inputs used to fair value Main Street’s Level 3 portfolio investments as of September 30, 2020 and December 31, 2019:


	****	Fair Value as of		****		****		****		****		****		****
		September 30,												****
Type of		2020					Significant				Weighted			****
Investment	****	(in thousands)			Valuation Technique		Unobservable Inputs		Range(3)		Average(3)		Median(3)
Equity investments		$	785,433		Discounted cash flow		WACC		9.5% - 20.8%		14.0	%	15.0	%
					Market comparable / Enterprise Value		EBITDA multiple (1)		4.5x - 8.5x(2)		7.0x		6.4x
Debt investments		$	1,304,901		Discounted cash flow		Risk adjusted discount factor		7.6% - 16.3%(2)		11.3	%	11.2	%
							Expected principal recovery percentage		0.0% - 100.0%		99.2	%	100.0	%
Debt investments		$	494,311		Market approach		Third‑party quote		30.5 - 101.9		91.8		95.0
Total Level 3 investments		$	2,584,645

(1)	EBITDA may include proforma adjustments and/or other addbacks based on specific circumstances related to each investment.
(2)	Range excludes outliers that are greater than one standard deviation from the mean. Including these outliers, the range for EBITDA multiple is 2.2x - 15.0x and the range for risk adjusted discount factor is 6.0% - 32.5%.
---	---
(3)	Does not include investments for which the valuation technique does not include the use of the applicable fair value input.
---	---

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	****	Fair Value as of		****		****		****		****		****		****
		December 31,												****
Type of		2019					Significant				Weighted			****
Investment	****	(in thousands)			Valuation Technique		Unobservable Inputs		Range(3)		Average(3)		Median(3)
Equity investments		$	819,749		Discounted cash flow		WACC		9.6% - 20.3%		13.6	%	14.2	%
					Market comparable / Enterprise Value		EBITDA multiple (1)		4.9x - 8.5x(2)		7.2x		6.4x
Debt investments		$	1,212,741		Discounted cash flow		Risk adjusted discount factor		5.9% - 16.5%(2)		10.4	%	10.0	%
							Expected principal recovery percentage		1.4% - 100.0%		99.3	%	100.0	%
Debt investments		$	569,834		Market approach		Third‑party quote		28.1 - 101.0		94.7		98.0
Total Level 3 investments		$	2,602,324

(1)	EBITDA may include proforma adjustments and/or other addbacks based on specific circumstances related to each investment.
(2)	Range excludes outliers that are greater than one standard deviation from the mean. Including these outliers, the range for EBITDA multiple is 4.5x - 15.0x and the range for risk adjusted discount factor is 4.6% - 38.0%.
---	---
(3)	Does not include investments for which the valuation technique does not include the use of the applicable fair value input.
---	---

The following tables provide a summary of changes in fair value of Main Street’s Level 3 portfolio investments for the nine-month periods ended September 30, 2020 and 2019 (amounts in thousands):


									Net
	Fair Value		Transfers						Changes		Net				Fair Value
	as of		Into						from		Unrealized				as of
Type of	December 31,		Level 3		Redemptions/		New		Unrealized		Appreciation				September 30,
Investment	2019		Hierarchy		Repayments		Investments		to Realized		(Depreciation)		Other(1)		2020
Debt	$	1,782,575	$	—	$	(299,726)	$	367,944	$	49,393	$	(88,706)	$	(12,268)	$	1,799,212
Equity		809,538		—		(25,304)		50,535		(4,047)		(65,837)		12,268		777,153
Equity Warrant		10,211		—		(1,165)		—		1,165		(1,931)		—		8,280
	$	2,602,324	$	—	$	(326,195)	$	418,479	$	46,511	$	(156,474)	$	—	$	2,584,645

(1)	Includes the impact of non-cash conversions. These transactions represent non-cash investing activities. See additional cash flow information at the consolidated statements of cash flows.


	****			****			****			****			****	Net		****			****			****
		Fair Value			Transfers									Changes			Net						Fair Value
		as of			Into									from			Unrealized						as of
Type of		December 31,			Level 3			Redemptions/			New			Unrealized			Appreciation						September 30,
Investment		2018			Hierarchy			Repayments			Investments		****	to Realized			(Depreciation)			Other(1)			2019
Debt		$	1,686,753		$	—		$	(360,335)		$	426,068		$	31,019		$	(19,559)		$	(20,289)		$	1,743,657
Equity			755,710			—			(20,338)			33,705			(13,834)			25,899			22,096			803,238
Equity Warrant			11,446			—			1,217			316			(1,090)			219			(1,807)			10,301
		$	2,453,909		$	—		$	(379,456)		$	460,089		$	16,095		$	6,559		$	—		$	2,557,196

(1)	Includes the impact of non-cash conversions. These transactions represent non-cash investing activities. See additional cash flow information at the consolidated statements of cash flows.

As of December 31, 2019, the fair value determination for the SBIC debentures recorded at fair value primarily consisted of unobservable inputs. As a result, the SBIC debentures which were recorded at fair value were categorized as Level 3. Main Street determined the fair value of these instruments primarily using a Yield-to-Maturity approach that analyzed the discounted cash flows of interest and principal for each SBIC debenture recorded at fair value based on estimated market interest rates for debt instruments of similar structure, terms, and maturity. Main Street’s estimate of the expected repayment date of principal for each SBIC debenture recorded at fair value was the legal maturity date of the instrument. The significant unobservable inputs used in the fair value measurement of Main Street’s SBIC debentures recorded at fair value were the estimated market interest rates used to fair value each debenture using the 64

Table of Contents yield valuation technique described above. As of September 30, 2020, all of the SBIC debentures previously accounted for on a fair value basis have been repaid.

The following tables provide a summary of changes for the Level 3 SBIC debentures recorded at fair value for the nine months ended September 30, 2020 and 2019 (amounts in thousands):


	****	Fair Value		****			****			****			****	Net		****	Fair Value
		as of												Unrealized			as of
Type of		December 31,						Net Realized			New SBIC			(Appreciation)			September 30,
Investment	****	2019			Repayments			Loss			Debentures		****	Depreciation		****	2020
SBIC debentures at fair value		$	21,927		$	(22,000)		$	533		$	—		$	(460)		$	—


	****	Fair Value		****			****			****			****	Net		****	Fair Value
		as of												Unrealized			as of
Type of		December 31,						Net Realized			New SBIC			(Appreciation)			September 30,
Investment	****	2018			Repayments			Loss			Debentures		****	Depreciation		****	2019
SBIC debentures at fair value		$	44,688		$	(24,000)		$	5,689		$	—		$	(4,625)		$	21,752

The following tables provide a summary of the significant unobservable inputs used to fair value Main Street’s Level 3 SBIC debentures as of December 31, 2019 (amounts in thousands):


	****	Fair Value		****		****		****		****		****
Type of		as of					Significant				Weighted	****
Investment		December 31, 2019			Valuation Technique		Unobservable Inputs		Range		Average	****
SBIC debentures		$	21,927		Discounted cash flow		Estimated market interest rates		3.2% - 3.5%		3.2	%

At September 30, 2020 and December 31, 2019, Main Street’s investments and SBIC debentures at fair value were categorized as follows in the fair value hierarchy for ASC 820 purposes:


					Fair Value Measurements
					(in thousands)
	****			****	Quoted Prices in		****			****	Significant
				****	Active Markets for		****	Significant Other		****	Unobservable
				****	Identical Assets		****	Observable Inputs		****	Inputs
At September 30, 2020		Fair Value		****	(Level 1)			(Level 2)		****	(Level 3)
LMM portfolio investments		$	1,228,061		$	—		$	—		$	1,228,061
Middle Market portfolio investments			441,293			—			—			441,293
Private Loan portfolio investments			743,683			—			—			743,683
Other Portfolio investments			100,528			—			—			100,528
External Investment Manager			71,080			—			—			71,080
Total investments		$	2,584,645		$	—		$	—		$	2,584,645


	****				Fair Value Measurements
					(in thousands)
					Quoted Prices in						Significant
				****	Active Markets for		****	Significant Other			Unobservable
				****	Identical Assets		****	Observable Inputs		****	Inputs
At December 31, 2019		Fair Value		****	(Level 1)		****	(Level 2)		****	(Level 3)
LMM portfolio investments		$	1,206,865		$	—		$	—		$	1,206,865
Middle Market portfolio investments			522,083			—			—			522,083
Private Loan portfolio investments			692,117			—			—			692,117
Other Portfolio investments			106,739			—			—			106,739
External Investment Manager			74,520			—			—			74,520
Total investments		$	2,602,324		$	—		$	—		$	2,602,324
SBIC debentures at fair value		$	21,927		$	—		$	—		$	21,927

Table of Contents Investment Portfolio Composition

Main Street’s LMM portfolio investments primarily consist of secured debt, equity warrants and direct equity investments in privately held, LMM companies based in the United States. Main Street’s LMM portfolio companies generally have annual revenues between $10 million and $150 million, and its LMM investments generally range in size from $5 million to $50 million. The LMM debt investments are typically secured by either a first or second priority lien on the assets of the portfolio company, can include either fixed or floating rate terms and generally have a term of between five and seven years from the original investment date. In most LMM portfolio investments, Main Street receives nominally priced equity warrants and/or makes direct equity investments in connection with a debt investment.

Main Street’s Middle Market portfolio investments primarily consist of direct investments in or secondary purchases of interest-bearing debt securities in privately held companies based in the United States that are generally larger in size than the companies included in Main Street’s LMM portfolio. Main Street’s Middle Market portfolio companies generally have annual revenues between $150 million and $1.5 billion, and its Middle Market investments generally range in size from $3 million to $20 million. Main Street’s Middle Market portfolio debt investments are generally secured by either a first or second priority lien on the assets of the portfolio company and typically have a term of between three and seven years from the original investment date.

Main Street’s Private Loan portfolio investments are primarily debt securities in privately held companies that have been originated through strategic relationships with other investment funds on a collaborative basis, and are often referred to in the debt markets as “club deals.” Private Loan investments are typically similar in size, structure, terms and conditions to investments Main Street holds in its LMM portfolio and Middle Market portfolio. Main Street’s Private Loan portfolio debt investments are generally secured by either a first or second priority lien on the assets of the portfolio company and typically have a term of between three and seven years from the original investment date.

Main Street’s Other Portfolio investments primarily consist of investments that are not consistent with the typical profiles for its LMM, Middle Market or Private Loan portfolio investments, including investments which may be managed by third parties. In the Other Portfolio, Main Street may incur indirect fees and expenses in connection with investments managed by third parties, such as investments in other investment companies or private funds. For Other Portfolio investments, Main Street generally receives distributions related to the assets held by the portfolio company. Those assets are typically expected to be liquidated over a five to ten-year period.

Main Street’s external asset management business is conducted through its External Investment Manager. The External Investment Manager earns management fees based on the assets of the funds under management and may earn incentive fees, or a carried interest, based on the performance of the funds managed. Main Street entered into an agreement with the External Investment Manager to share employees in connection with its asset management business generally, and specifically for its relationship with HMS Income Fund, Inc. (“HMS Income”). Through this agreement, Main Street shares employees with the External Investment Manager, including their related infrastructure, business relationships, management expertise and capital raising capabilities. Main Street allocates the related expenses to the External Investment Manager pursuant to the sharing agreement. Main Street’s total expenses for the three months ended September 30, 2020 and 2019 are net of expenses allocated to the External Investment Manager of $1.9 million and $1.7 million, respectively. Main Street’s total expenses for the nine months ended September 30, 2020 and 2019 are net of expenses allocated to the External Investment Manager of $5.3 million and $5.0 million, respectively.

Investment income, consisting of interest, dividends and fees, can fluctuate dramatically due to various factors, including the level of new investment activity, repayments of debt investments or sales of equity interests. Investment income in any given year could also be highly concentrated among several portfolio companies. For the three and nine months ended September 30, 2020 and 2019, Main Street did not record investment income from any single portfolio company in excess of 10% of total investment income. 66

Table of Contents The following tables provide a summary of Main Street’s investments in the LMM, Middle Market and Private Loan portfolios as of September 30, 2020 and December 31, 2019 (this information excludes the Other Portfolio investments and the External Investment Manager which are discussed further below):


	****	As of September 30, 2020
		LMM (a)			Middle Market			Private Loan		****
		(dollars in millions)
Number of portfolio companies			70			42			68
Fair value		$	1,228.1		$	441.3		$	743.7
Cost		$	1,063.6		$	515.5		$	823.0
% of portfolio at cost - debt			66.2	%		94.4	%		93.8	%
% of portfolio at cost - equity			33.8	%		5.6	%		6.2	%
% of debt investments at cost secured by first priority lien			97.1	%		92.3	%		95.8	%
Weighted-average annual effective yield (b)			11.6	%		7.9	%		8.6	%
Average EBITDA (c)		$	5.0		$	110.5		$	54.2

(a)	At September 30, 2020, Main Street had equity ownership in approximately 99% of its LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was approximately 41%.
(b)	The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of September 30, 2020, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. The weighted-average annual effective yield is higher than what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect Main Street’s expenses or any sales load paid by an investor.
---	---
(c)	The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Middle Market and Private Loan portfolios. These calculations exclude certain portfolio companies, including two LMM portfolio companies, one Middle Market portfolio company and four Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for Main Street’s investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate.
---	---


	****	As of December 31, 2019
		LMM (a)			Middle Market			Private Loan		****
		(dollars in millions)
Number of portfolio companies			69			51			65
Fair value		$	1,206.9		$	522.1		$	692.1
Cost		$	1,002.2		$	572.3		$	734.8
% of portfolio at cost - debt			65.9	%		94.8	%		94.6	%
% of portfolio at cost - equity			34.1	%		5.2	%		5.4	%
% of debt investments at cost secured by first priority lien			98.1	%		91.3	%		95.4	%
Weighted-average annual effective yield (b)			11.8	%		8.6	%		9.5	%
Average EBITDA (c)		$	5.1		$	85.0		$	57.8

(a)	At December 31, 2019, Main Street had equity ownership in approximately 99% of its LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was approximately 42%.
(b)	The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of December 31, 2019, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. The weighted-average annual effective yield is higher than what an investor in shares of Main Street’s common stock will realize on its investment because it does not reflect Main Street’s expenses or any sales load paid by an investor.
---	---
(c)	The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Middle Market and Private Loan portfolios. These calculations exclude certain portfolio companies, including three LMM portfolio companies, two Middle Market portfolio companies and three Private Loan portfolio companies, as
---	---

Table of Contents

EBITDA is not a meaningful valuation metric for Main Street’s investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate.

As of September 30, 2020, Main Street had Other Portfolio investments in twelve companies, collectively totaling approximately $100.5 million in fair value and approximately $126.2 million in cost basis and which comprised approximately 3.9% of Main Street’s Investment Portfolio at fair value. As of December 31, 2019, Main Street had Other Portfolio investments in eleven companies, collectively totaling approximately $106.7 million in fair value and approximately $118.4 million in cost basis and which comprised approximately 4.1% of Main Street’s Investment Portfolio at fair value.

As discussed further in Note A.1., Main Street holds an investment in the External Investment Manager, a wholly owned subsidiary that is treated as a portfolio investment. As of September 30, 2020, there was no cost basis in this investment and the investment had a fair value of approximately $71.1 million, which comprised approximately 2.8% of Main Street’s Investment Portfolio at fair value. As of December 31, 2019, there was no cost basis in this investment and the investment had a fair value of approximately $74.5 million, which comprised approximately 2.9% of Main Street’s Investment Portfolio at fair value.

The following tables summarize the composition of Main Street’s total combined LMM portfolio investments, Middle Market portfolio investments and Private Loan portfolio investments at cost and fair value by type of investment as a percentage of the total combined LMM portfolio investments, Middle Market portfolio investments and Private Loan portfolio investments, as of September 30, 2020 and December 31, 2019 (this information excludes the Other Portfolio investments and the External Investment Manager).


Cost:	****	September 30, 2020	****	December 31, 2019
First lien debt		77.9	%	78.2	%
Equity		17.8	%	17.2	%
Second lien debt		3.0	%	3.5	%
Equity warrants		0.5	%	0.6	%
Other		0.8	%	0.5	%
		100.0	%	100.0	%


Fair Value:	****	September 30, 2020	****	December 31, 2019		****
First lien debt		71.0	%	70.1	%
Equity		25.1	%	26.0	%
Second lien debt		2.8	%	3.0	%
Equity warrants		0.3	%	0.4	%
Other		0.8	%	0.5	%
		100.0	%	100.0	%

The following tables summarize the composition of Main Street’s total combined LMM portfolio investments, Middle Market portfolio investments and Private Loan portfolio investments by geographic region of the United States and other countries at cost and fair value as a percentage of the total combined LMM portfolio investments, Middle Market portfolio investments and Private Loan portfolio investments, as of September 30, 2020 and December 31, 2019 68

Table of Contents (this information excludes the Other Portfolio investments and the External Investment Manager). The geographic composition is determined by the location of the corporate headquarters of the portfolio company.


Cost:	****	September 30, 2020	****	December 31, 2019		****
Southwest		26.0	%	25.0	%
West		21.0	%	24.6	%
Midwest		19.4	%	20.6	%
Northeast		18.8	%	14.8	%
Southeast		13.3	%	13.2	%
Canada		1.1	%	1.2	%
Other Non-United States		0.4	%	0.6	%
		100.0	%	100.0	%


Fair Value:	****	September 30, 2020	****	December 31, 2019		****
Southwest		26.6	%	26.7	%
West		21.5	%	25.1	%
Midwest		19.7	%	20.6	%
Northeast		18.5	%	14.4	%
Southeast		12.3	%	11.6	%
Canada		1.0	%	1.1	%
Other Non-United States		0.4	%	0.5	%
		100.0	%	100.0	%

Main Street’s LMM portfolio investments, Middle Market portfolio investments and Private Loan portfolio investments are in companies conducting business in a variety of industries. The following tables summarize the composition of Main Street’s total combined LMM portfolio investments, Middle Market portfolio investments and 69

Table of Contents Private Loan portfolio investments by industry at cost and fair value as of September 30, 2020 and December 31, 2019 (this information excludes the Other Portfolio investments and the External Investment Manager).


Cost:	September 30, 2020		December 31, 2019
Machinery	7.1	%	7.7	%
Construction & Engineering	5.8	%	5.4	%
Aerospace & Defense	5.6	%	4.9	%
Health Care Providers & Services	5.3	%	4.5	%
Internet Software & Services	5.1	%	4.1	%
Commercial Services & Supplies	4.9	%	6.1	%
Professional Services	4.8	%	2.9	%
Energy Equipment & Services	4.7	%	5.4	%
Media	3.9	%	5.3	%
IT Services	3.9	%	4.6	%
Leisure Equipment & Products	3.9	%	3.8	%
Hotels, Restaurants & Leisure	3.8	%	3.7	%
Diversified Telecommunication Services	3.7	%	3.9	%
Software	3.4	%	2.4	%
Electronic Equipment, Instruments & Components	3.2	%	3.5	%
Communications Equipment	3.2	%	3.1	%
Oil, Gas & Consumable Fuels	3.1	%	3.6	%
Specialty Retail	3.1	%	3.1	%
Food Products	3.0	%	3.0	%
Distributors	2.3	%	1.1	%
Diversified Financial Services	2.2	%	1.9	%
Containers & Packaging	1.6	%	1.7	%
Computers & Peripherals	1.4	%	2.3	%
Trading Companies & Distributors	1.2	%	0.0	%
Diversified Consumer Services	1.0	%	0.4	%
Transportation Infrastructure	1.0	%	1.0	%
Food & Staples Retailing	1.0	%	1.0	%
Chemicals	0.9	%	1.0	%
Building Products	0.9	%	1.3	%
Road & Rail	0.4	%	1.4	%
Construction Materials	0.3	%	1.0	%
Other (1)	4.3	%	4.9	%
	100.0	%	100.0	%

(1)	Includes various industries with each industry individually less than 1.0% of the total combined LMM portfolio investments, Middle Market portfolio investments and Private Loan portfolio investments at each date.

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Fair Value:	September 30, 2020		December 31, 2019
Machinery	9.2	%	9.9	%
Construction & Engineering	6.5	%	5.6	%
Aerospace & Defense	5.6	%	4.7	%
Health Care Providers & Services	5.0	%	4.3	%
Commercial Services & Supplies	4.5	%	5.5	%
Internet Software & Services	4.5	%	3.8	%
Leisure Equipment & Products	3.9	%	3.5	%
IT Services	3.8	%	4.8	%
Software	3.8	%	2.7	%
Media	3.6	%	4.7	%
Energy Equipment & Services	3.5	%	4.9	%
Professional Services	3.5	%	2.2	%
Specialty Retail	3.3	%	3.4	%
Diversified Telecommunication Services	3.2	%	3.3	%
Computers & Peripherals	3.0	%	3.8	%
Diversified Consumer Services	3.0	%	2.2	%
Communications Equipment	2.9	%	2.7	%
Oil, Gas & Consumable Fuels	2.8	%	3.2	%
Hotels, Restaurants & Leisure	2.7	%	3.3	%
Food Products	2.7	%	2.7	%
Electronic Equipment, Instruments & Components	2.6	%	2.7	%
Diversified Financial Services	2.5	%	2.1	%
Distributors	2.3	%	1.0	%
Containers & Packaging	1.8	%	1.7	%
Trading Companies & Distributors	1.2	%	0.0	%
Transportation Infrastructure	1.0	%	1.0	%
Food & Staples Retailing	1.0	%	1.0	%
Building Products	1.0	%	1.2	%
Construction Materials	0.7	%	1.5	%
Road & Rail	0.6	%	1.5	%
Other (1)	4.3	%	5.1	%
	100.0	%	100.0	%

(1)	Includes various industries with each industry individually less than 1.0% of the total combined LMM portfolio investments, Middle Market portfolio investments and Private Loan portfolio investments at each date.

At September 30, 2020 and December 31, 2019, Main Street had no portfolio investment that was greater than 10% of the Investment Portfolio at fair value.

Unconsolidated Significant Subsidiaries

In accordance with Rules 3-09 and 4-08(g) of Regulation S-X, Main Street must determine which of its unconsolidated controlled portfolio companies, if any, are considered “significant subsidiaries.” On May 20, 2020, the SEC published in Release No. 33-10786, Amendments to Financial Disclosures about Acquired and Disposed Businesses, amendments to Rule 1-02(w)(2) of Regulation S-X used in the determination of a significant subsidiary specific to investment companies, including BDCs. The amendments become effective on January 1, 2021, but the SEC allowed for early application. Main Street elected to apply these revisions effective June 30, 2020. In evaluating its unconsolidated controlled portfolio companies in accordance with the revised rules, there are two tests that Main Street must utilize to determine if any of Main Street’s Control Investments (as defined in Note A, including those unconsolidated portfolio companies defined as Control Investments in which Main Street does not own greater than 50% of the voting securities or maintain greater than 50% of the board representation) are considered significant subsidiaries: the investment test and the income test. The investment test is generally measured by dividing Main Street’s investment in the Control Investment by the value of Main Street’s total assets. The income test is measured by dividing the absolute value of the combined total of total investment income, net realized gain (loss) and net unrealized appreciation (depreciation) from the relevant Control Investment for the period being tested by the absolute value of Main Street’s 71

Table of Contents change in net assets resulting from operations for the same period. Rules 3-09 and 4-08(g) of Regulation S-X, as interpreted by the SEC, require Main Street to include (1) separate audited financial statements of an unconsolidated majority-owned subsidiary (Control Investments in which Main Street owns greater than 50% of the voting securities) in an annual report and (2) summarized financial information of a Control Investment in a quarterly report, respectively, if certain thresholds of the investment or income tests are exceeded and the unconsolidated portfolio company qualifies as a significant subsidiary.

As of September 30, 2020 and December 31, 2019, Main Street had no single investment that qualified as a significant subsidiary under either the investment or income tests.

NOTE D—EXTERNAL INVESTMENT MANAGER

As discussed further in Note A.1., the External Investment Manager provides investment management and other services to External Parties. The External Investment Manager is accounted for as a portfolio investment of MSCC since the External Investment Manager conducts all of its investment management activities for External Parties.

During May 2012, Main Street entered into an investment sub-advisory agreement with HMS Adviser, LP (“HMS Adviser”), which is the investment advisor to HMS Income, a non-listed BDC, to provide certain investment advisory services to HMS Adviser. In December 2013, after obtaining required no-action relief from the SEC to allow it to own a registered investment adviser, Main Street assigned the sub-advisory agreement to the External Investment Manager since the fees received from such arrangement could otherwise have negative consequences on MSCC’s ability to meet the source-of-income requirement necessary for it to maintain its RIC tax treatment. Under the investment sub-advisory agreement, the External Investment Manager is entitled to 50% of the base management fee and the incentive fees earned by HMS Adviser under its advisory agreement with HMS Income. During the three months ended September 30, 2020 and 2019, the External Investment Manager earned $2.3 million and $2.7 million, respectively, in base management fee income. No incentive fee income was earned in the three months ended September 30, 2020 compared to $0.2 million earned in the three months ended September 30, 2019. During the nine months ended September 30, 2020, the External Investment Manager earned $7.2 million in base management fee income and no incentive fees compared to $8.4 million of base management fees and $1.6 million in incentive fees for the comparable period in 2019 under the sub-advisory agreement with HMS Adviser.

The investment in the External Investment Manager is accounted for using fair value accounting, with the fair value determined by Main Street and approved, in good faith, by Main Street’s Board of Directors. Main Street determines the fair value of the External Investment Manager using the Waterfall valuation method under the market approach (see further discussion in Note B.1.). Any change in fair value of the investment in the External Investment Manager is recognized on Main Street’s consolidated statements of operations in “Net Unrealized Appreciation (Depreciation)—Control investments.”

The External Investment Manager is an indirect wholly owned subsidiary of MSCC owned through a Taxable Subsidiary and is a disregarded entity for tax purposes. The External Investment Manager has entered into a tax sharing agreement with its Taxable Subsidiary owner. Since the External Investment Manager is accounted for as a portfolio investment of MSCC and is not included as a consolidated subsidiary of MSCC in MSCC’s consolidated financial statements, and as a result of the tax sharing agreement with its Taxable Subsidiary owner, for financial reporting purposes the External Investment Manager is treated as if it is taxed at normal corporate tax rates based on its taxable income and, as a result of its activities, may generate income tax expense or benefit. Main Street owns the External Investment Manager through the Taxable Subsidiary to allow MSCC to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The taxable income, or loss, of the External Investment Manager may differ from its book income, or loss, due to temporary book and tax timing differences and permanent differences. As a result of the above described financial reporting and tax treatment, the External Investment Manager provides for any income tax expense, or benefit, and any tax assets or liabilities in its separate financial statements.

Main Street shares employees with the External Investment Manager and allocates costs related to such shared employees to the External Investment Manager generally based on a combination of the direct time spent, new investment origination activity and assets under management, depending on the nature of the expense. For the three months ended September 30, 2020 and 2019, Main Street allocated $1.9 million and $1.7 million of total expenses, respectively, to the External Investment Manager. For each of the nine months ended September 30, 2020 and 2019, 72

Table of Contents Main Street allocated $5.3 million and $5.0 million of total expenses, respectively, to the External Investment Manager. The total contribution of the External Investment Manager to Main Street’s net investment income consists of the combination of the expenses allocated to the External Investment Manager and the dividend income earned from the External Investment Manager. For the three months ended September 30, 2020 and 2019, the total contribution to Main Street’s net investment income was $2.2 million and $2.6 million, respectively. For the nine months ended September 30, 2020 and 2019, the total contribution to Main Street’s net investment income was $6.7 million and $8.9 million, respectively.

Summarized financial information from the separate financial statements of the External Investment Manager as of September 30, 2020 and December 31, 2019 and for the three and nine months ended September 30, 2020 and 2019 is as follows:


		As of			As of
		September 30,			December 31,
	****	2020		****	2019
		(dollars in thousands)
Cash		$	—		$	—
Accounts receivable—HMS Income			2,361			2,708
Total assets		$	2,361		$	2,708
Accounts payable to MSCC and its subsidiaries		$	2,023		$	1,592
Dividend payable to MSCC and its subsidiaries			338			1,116
Equity			—			—
Total liabilities and equity		$	2,361		$	2,708


		Three Months Ended						Nine Months Ended
		September 30,						September 30,
	****	2020		****	2019		****	2020		****	2019		****
		(dollars in thousands)
Management fee income		$	2,338		$	2,750		$	7,160		$	8,427
Incentive fees			—			178			—			1,552
Total revenues			2,338			2,928			7,160			9,979
Expenses allocated from MSCC or its subsidiaries:
Salaries, share‑based compensation and other personnel costs			(1,206)			(1,118)			(3,393)			(3,294)
Other G&A expenses			(686)			(533)			(1,947)			(1,707)
Total allocated expenses			(1,892)			(1,651)			(5,340)			(5,001)
Pre‑tax income			446			1,277			1,820			4,978
Tax expense			(108)			(286)			(426)			(1,106)
Net income		$	338		$	991		$	1,394		$	3,872

NOTE E—DEBT

SBIC Debentures

Under existing SBIC regulations, SBA-approved SBICs under common control have the ability to issue debentures guaranteed by the SBA up to a regulatory maximum amount of $350.0 million. Main Street’s SBIC debentures payable, under existing SBA-approved commitments, were $304.8 million and $311.8 million at September 30, 2020 and December 31, 2019, respectively. SBIC debentures provide for interest to be paid semiannually, with principal due at the applicable 10-year maturity date of each debenture. During the nine months ended September 30, 2020, Main Street issued $35.0 million of SBIC debentures and opportunistically prepaid the remaining $42.0 million of existing MSC II SBIC debentures. As a result of this prepayment, Main Street recognized a realized loss of $0.5 million, due primarily to the write-off of the related unamortized deferred financing costs. Main Street expects to issue new SBIC debentures under the SBIC program in the future in an amount up to the regulatory maximum amount for affiliated SBIC funds. The weighted-average annual interest rate on the SBIC debentures was 3.4% and 3.6% as of September 30, 2020 and December 31, 2019, respectively. The first principal maturity due under the existing SBIC debentures is in 2021, and the weighted-average remaining duration as of September 30, 2020 was approximately 5.5 years. For the three months ended September 30, 2020 and 2019, Main Street recognized interest expense, including the amortization of upfront leverage and other miscellaneous fees, attributable to the SBIC debentures of $3.0 million and $3.2 million, 73

Table of Contents respectively. For the nine months ended September 30, 2020 and 2019, Main Street recognized interest expense, including the amortization of upfront leverage and other miscellaneous fees, attributable to the SBIC debentures of $9.0 million and $9.7 million, respectively. In accordance with SBIC regulations, the Funds are precluded from incurring additional non-SBIC debt without the prior approval of the SBA.

As of September 30, 2020, the recorded value of the SBIC debentures was $298.8 million, which consisted of (i) $129.8 million par value of SBIC debentures outstanding issued by MSMF, with a recorded value of $128.3 million that was net of unamortized debt issuance costs of $1.5 million and (ii) $175.0 million par value of SBIC debentures issued by MSC III with a recorded value of $170.6 million that was net of unamortized debt issuance costs of $4.4 million. As of September 30, 2020, if Main Street had adopted the fair value option under ASC 825 for its SBIC debentures, Main Street estimates the fair value of its SBIC debentures would be approximately $289.3 million, or $15.5 million less than the $304.8 million face value of the SBIC debentures.

Credit Facility

Main Street maintains the Credit Facility to provide additional liquidity to support its investment and operational activities. The Credit Facility includes total commitments of $740.0 million from a diversified group of 18 lenders. The Credit Facility matures in September 2023 and contains an accordion feature which allows Main Street to increase the total commitments under the facility to up to $800.0 million from new and existing lenders on the same terms and conditions as the existing commitments. See Note M for discussion of the increase in total commitments under the Credit Facility subsequent to September 30, 2020.

Borrowings under the Credit Facility bear interest, subject to Main Street’s election and resetting on a monthly basis on the first of each month, on a per annum basis at a rate equal to the applicable LIBOR rate (0.1% as of September 30, 2020) plus (i) 1.875% (or the applicable base rate (Prime Rate of 3.25% as of September 30, 2020) plus 0.875%) as long as Main Street meets certain agreed upon excess collateral and maximum leverage requirements or (ii) 2.0% (or the applicable base rate plus 1.0%) otherwise. Main Street pays unused commitment fees of 0.25% per annum on the unused lender commitments under the Credit Facility. The Credit Facility is secured by a first lien on the assets of MSCC and its subsidiaries, excluding the equity ownership or assets of the Funds and the External Investment Manager. The Credit Facility contains certain affirmative and negative covenants, including but not limited to: (i) maintaining a minimum availability of at least 10% of the borrowing base, (ii) maintaining an interest coverage ratio of at least 2.0 to 1.0, (iii) maintaining an asset coverage ratio (tangible net worth to Credit Facility borrowings) of at least 1.5 to 1.0 and (iv) maintaining a minimum tangible net worth. The Credit Facility is provided on a revolving basis through its final maturity date in September 2023, and contains two, one-year extension options which could extend the final maturity by up to two years, subject to certain conditions, including lender approval.

At September 30, 2020, Main Street had $253.0 million in borrowings outstanding under the Credit Facility. As of September 30, 2020, if Main Street had adopted the fair value option under ASC 825 for its Credit Facility, Main Street estimates its fair value would approximate its recorded value. Main Street recognized interest expense related to the Credit Facility, including unused commitment fees and amortization of deferred issuance costs, of $1.9 million for each of the three months ended September 30, 2020 and 2019, and $7.3 million and $8.3 million for the nine months ended September 30, 2020 and 2019, respectively. As of September 30, 2020, the interest rate on the Credit Facility was 2.0% (based on the LIBOR rate of 0.2% as of the most recent reset date plus 1.875%). The average interest rate for borrowings under the Credit Facility was 2.0% and 4.1% for the three months ended September 30, 2020 and 2019, respectively, and 2.7% and 4.3%, for the nine months ended September, 2020 and 2019, respectively. As of September 30, 2020, Main Street was in compliance with all financial covenants of the Credit Facility.

4.50% Notes due 2019

In November 2014, Main Street issued $175.0 million in aggregate principal amount of 4.50% unsecured notes due 2019 (the “4.50% Notes due 2019”) at an issue price of 99.53%. The 4.50% Notes due 2019 bore interest at a rate of 4.50% per year payable semiannually on June 1 and December 1 of each year. On December 2, 2019, Main Street repaid the entire principal amount of the issued and outstanding 4.50% Notes due 2019, effective December 1, 2019 (the “Maturity Date”), at par value plus the accrued and unpaid interest thereon from June 1, 2019 through the Maturity Date. Main Street recognized no interest expense related to the 4.50% Notes due 2019, including amortization of unamortized 74

Table of Contents deferred issuance costs, for the three and nine months ended September 30, 2020 and $2.1 million and $6.4 million for the three and nine months ended September 30, 2019, respectively.

4.50% Notes due 2022

In November 2017, Main Street issued $185.0 million in aggregate principal amount of 4.50% unsecured notes due December 1, 2022 (the “4.50% Notes due 2022”) at an issue price of 99.16%. The 4.50% Notes due 2022 are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness; senior to any of its future indebtedness that expressly provides it is subordinated to the 4.50% Notes due 2022; effectively subordinated to all of its existing and future secured indebtedness, to the extent of the value of the assets securing such indebtedness, including borrowings under its Credit Facility; and structurally subordinated to all existing and future indebtedness and other obligations of any of its subsidiaries, including without limitation, the indebtedness of the Funds. The 4.50% Notes due 2022 may be redeemed in whole or in part at any time at Main Street’s option subject to certain make-whole provisions. The 4.50% Notes due 2022 bear interest at a rate of 4.50% per year payable semiannually on June 1 and December 1 of each year. The total net proceeds from the 4.50% Notes due 2022, resulting from the issue price and after underwriting discounts and estimated offering expenses payable, were approximately $182.2 million. Main Street may from time to time repurchase the 4.50% Notes due 2022 in accordance with the 1940 Act and the rules promulgated thereunder. As of September 30, 2020, the outstanding balance of the 4.50% Notes due 2022 was $185.0 million and the recorded value of $183.7 million was net of unamortized debt issuance costs of $1.3 million. As of September 30, 2020, if Main Street had adopted the fair value option under ASC 825 for the 4.50% Notes due 2022, Main Street estimates its fair value would be approximately $192.1 million. Main Street recognized interest expense related to the 4.50% Notes due 2022, including amortization of unamortized deferred issuance costs, of $2.2 million for each of the three months ended September 30, 2020 and 2019 and $6.7 million for each of the nine months ended September 30, 2020 and 2019.

The indenture governing the 4.50% Notes due 2022 (the “4.50% Notes Indenture”) contains certain covenants, including covenants requiring Main Street’s compliance with (regardless of whether Main Street is subject to) the asset coverage requirements set forth in Section 18(a)(1)(A) as modified by Section 61(a)(1) of the 1940 Act, as well as covenants requiring Main Street to provide financial information to the holders of the 4.50% Notes due 2022 and the Trustee if Main Street ceases to be subject to the reporting requirements of the Exchange Act. These covenants are subject to limitations and exceptions that are described in the 4.50% Notes Indenture. As of September 30, 2020, Main Street was in compliance with these covenants.

5.20% Notes

In April 2019, Main Street issued $250.0 million in aggregate principal amount of 5.20% unsecured notes due May 1, 2024 (the “5.20% Notes”) at an issue price of 99.125%. Subsequently, in December 2019, Main Street issued an additional $75.0 million of the 5.20% Notes at an issue price of 105.0% and, in July 2020, Main Street issued an additional $125.0 million aggregate principal amount at an issue price of 102.674%. The 5.20% Notes issued in December 2019 and July 2020 have identical terms as, and are a part of a single series with, the 5.20% Notes issued in April 2019. The 5.20% Notes are unsecured obligations and rank pari passu with Main Street’s current and future unsecured indebtedness; senior to any of its future indebtedness that expressly provides it is subordinated to the 5.20% Notes; effectively subordinated to all of its existing and future secured indebtedness, to the extent of the value of the assets securing such indebtedness, including borrowings under its Credit Facility; and structurally subordinated to all existing and future indebtedness and other obligations of any of its subsidiaries, including without limitation, the indebtedness of the Funds. The 5.20% Notes may be redeemed in whole or in part at any time at Main Street’s option subject to certain make-whole provisions. The 5.20% Notes bear interest at a rate of 5.20% per year payable semiannually on May 1 and November 1 of each year. The total net proceeds from the 5.20% Notes, resulting from the issue price and after net underwriting premiums and estimated offering expenses payable, were approximately $451.4 million. Main Street may from time to time repurchase the 5.20% Notes in accordance with the 1940 Act and the rules promulgated thereunder. As of September 30, 2020, the outstanding balance of the 5.20% Notes was $450.0 million and the recorded value of $452.0 million was net of unamortized debt issuance premium of $2.0 million. As of September 30, 2020, if Main Street had adopted the fair value option under ASC 825 for the 5.20% Notes, Main Street estimates its fair value would be approximately $474.2 million. Main Street recognized interest expense related to the 5.20% Notes, including amortization of unamortized deferred issuance costs, of $5.3 million and $3.5 million for the 75

Table of Contents three months ended September 30, 2020 and 2019, respectively, and $13.8 million and $6.1 million for the nine months ended September 30, 2020 and 2019, respectively.

The indenture governing the 5.20% Notes (the “5.20% Notes Indenture”) contains certain covenants, including covenants requiring Main Street’s compliance with (regardless of whether Main Street is subject to) the asset coverage requirements set forth in Section 18(a)(1)(A) as modified by Section 61(a)(1) of the 1940 Act, as well as covenants requiring Main Street to provide financial information to the holders of the 5.20% Notes and the Trustee if Main Street ceases to be subject to the reporting requirements of the Exchange Act. These covenants are subject to limitations and exceptions that are described in the 5.20% Notes Indenture. As of September 30, 2020, Main Street was in compliance with these covenants.

NOTE F—FINANCIAL HIGHLIGHTS


	****	Nine Months Ended September 30,					****
Per Share Data:	****	2020		****	2019		****
NAV at the beginning of the period		$	23.91		$	24.09
Net investment income(1)			1.50			1.88
Net realized loss(1)(2)			(0.69)			(0.32)
Net unrealized appreciation (depreciation)(1)(2)			(1.80)			0.28
Income tax benefit (provision)(1)(2)			0.23			(0.03)
Net increase (decrease) in net assets resulting from operations(1)			(0.76)			1.81
Dividends paid			(1.85)			(2.05)
Impact of the net change in monthly dividends declared prior to the end of the period and paid in the subsequent period			—			(0.01)
Accretive effect of stock offerings (issuing shares above NAV per share)			0.21			0.31
Accretive effect of DRIP issuance (issuing shares above NAV per share)			0.07			0.08
Other(3)			(0.06)			(0.03)
NAV at the end of the period		$	21.52		$	24.20
Market value at the end of the period		$	29.57		$	43.21
Shares outstanding at the end of the period			66,138,440			63,314,513

(1)	Based on weighted-average number of common shares outstanding for the period.
(2)	Net realized gains or losses, net unrealized appreciation or depreciation, and income taxes can fluctuate significantly from period to period.
---	---
(3)	Includes the impact of the different share amounts as a result of calculating certain per share data based on the weighted-average basic shares outstanding during the period and certain per share data based on the shares outstanding as of a period end or transaction date.
---	---


	****	Nine Months Ended September 30,					****
	****	2020		****	2019		****
		(dollars in thousands)
NAV at end of period		$	1,423,182		$	1,532,055
Average NAV		$	1,416,672		$	1,512,921
Average outstanding debt		$	1,136,300		$	1,033,400
Ratio of total expenses, including income tax expense, to average NAV(1)(2)			3.36	%		4.43	%
Ratio of operating expenses to average NAV(2)(3)			4.36	%		4.27	%
Ratio of operating expenses, excluding interest expense, to average NAV(2)(3)			1.76	%		1.82	%
Ratio of net investment income to average NAV(2)			6.94	%		7.81	%
Portfolio turnover ratio(2)			10.96	%		14.44	%
Total investment return(2)(4)			(27.31)	%		34.48	%
Total return based on change in NAV(2)(5)			(3.25)	%		7.69	%

(1)	Total expenses are the sum of operating expenses and net income tax provision/benefit. Net income tax provision/benefit includes the accrual of net deferred tax provision/benefit relating to the net unrealized

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appreciation/depreciation on portfolio investments held in Taxable Subsidiaries and due to the change in the loss carryforwards, which are non-cash in nature and may vary significantly from period to period. Main Street is required to include net deferred tax provision/benefit in calculating its total expenses even though these net deferred taxes are not currently payable/receivable.
(2)	Not annualized.
---	---
(3)	Unless otherwise noted, operating expenses include interest, compensation, general and administrative and share-based compensation expenses, net of expenses allocated to the External Investment Manager.
---	---
(4)	Total investment return is based on the purchase of stock at the current market price on the first day and a sale at the current market price on the last day of each period reported on the table and assumes reinvestment of dividends at prices obtained by Main Street’s dividend reinvestment plan during the period. The return does not reflect any sales load that may be paid by an investor.
---	---
(5)	Total return is based on change in net asset value was calculated using the sum of ending net asset value plus dividends to stockholders and other non-operating changes during the period, as divided by the beginning net asset value. Non-operating changes include any items that affect net asset value other than the net increase in net assets resulting from operations, such as the effects of stock offerings, shares issued under the DRIP and equity incentive plans and other miscellaneous items.
---	---

NOTE G—DIVIDENDS, DISTRIBUTIONS AND TAXABLE INCOME

Main Street paid regular monthly dividends of $0.205 per share for each month of January through September 2020, totaling $40.6 million, or $0.615 per share, for the three months ended September 30, 2020, and $120.2 million, or $1.845 per share, for the nine months ended September 30, 2020 compared to regular monthly dividends of approximately $38.9 million, or $0.615 per share, for the three months ended September 30, 2019, and $112.5 million, or $1.800 per share, for the nine months ended September 30, 2019. Additionally, Main Street paid a $0.250 per share semi-annual supplemental dividend, totaling $15.8 million, in June 2019. Total dividends paid for the nine months ended September 30, 2020 and 2019 equaled $1.845 and $2.050 per share, respectively.

MSCC has elected to be treated for U.S. federal income tax purposes as a RIC. MSCC’s taxable income includes the taxable income generated by MSCC and certain of its subsidiaries, including the Funds, which are treated as disregarded entities for tax purposes. As a RIC, MSCC generally will not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that MSCC distributes to its stockholders. MSCC must generally distribute at least 90% of its “investment company taxable income” (which is generally its net ordinary taxable income and realized net short-term capital gains in excess of realized net long-term capital losses) and 90% of its tax-exempt income to maintain its RIC status (pass-through tax treatment for amounts distributed). As part of maintaining RIC status, undistributed taxable income (subject to a 4% non-deductible U.S. federal excise tax) pertaining to a given fiscal year may be distributed up to 12 months subsequent to the end of that fiscal year, provided such dividends are declared on or prior to the later of (i) filing of the U.S. federal income tax return for the applicable fiscal year or (ii) the fifteenth day of the ninth month following the close of the year in which such taxable income was generated.

The determination of the tax attributes for Main Street’s distributions is made annually, based upon its taxable income for the full year and distributions paid for the full year. Therefore, a determination made on an interim basis may not be representative of the actual tax attributes of distributions for a full year. Ordinary dividend distributions from a RIC do not qualify for the 20% maximum tax rate (plus a 3.8% Medicare surtax, if applicable) on dividend income from domestic corporations and qualified foreign corporations, except to the extent that the RIC received the income in the form of qualifying dividends from domestic corporations and qualified foreign corporations. The tax attributes for distributions will generally include both ordinary income and qualified dividends, but may also include either one or both of capital gains and return of capital. 77

Table of Contents Listed below is a reconciliation of “Net increase (decrease) in net assets resulting from operations” to taxable income and to total distributions declared to common stockholders for the nine months ended September 30, 2020 and 2019.


		Nine months ended
		September 30,
	****	2020		****	2019		****
		(estimated, dollars in thousands)
Net increase (decrease) in net assets resulting from operations		$	(49,874)		$	113,555
Book‑tax difference from share‑based compensation expense			2,710			(1,690)
Net unrealized (appreciation) depreciation			117,570			(17,779)
Income tax provision (benefit)			(14,253)			2,491
Pre-tax book (income) loss not consolidated for tax purposes			2,413			(21,117)
Book income and tax income differences, including debt origination, structuring fees, dividends, realized gains and changes in estimates			53,521			47,866
Estimated taxable income(1)			112,087			123,326
Taxable income earned in prior year and carried forward for distribution in current year			29,107			41,489
Taxable income earned prior to period end and carried forward for distribution next period			(34,189)			(48,462)
Dividend payable as of period end and paid in the following period			13,554			12,975
Total distributions accrued or paid to common stockholders		$	120,559		$	129,328

(1)	Main Street’s taxable income for each period is an estimate and will not be finally determined until the company files its tax return for each year. Therefore, the final taxable income, and the taxable income earned in each period and carried forward for distribution in the following period, may be different than this estimate.

The income tax provision (benefit) for Main Street is generally composed of (i) deferred tax expense (benefit), which is primarily the result of the net activity relating to the portfolio investments held in the Taxable Subsidiaries, including changes in loss carryforwards, changes in net unrealized appreciation or depreciation and other temporary book tax differences, and (ii) current tax expense, which is primarily the result of current U.S. federal income and state taxes and excise taxes on Main Street’s estimated undistributed taxable income. For the three months ended September 30, 2020, Main Street recognized a net income tax provision of $1.5 million, principally consisting of a $1.2 million current tax provision, which is primarily related to a $0.8 million provision for current U.S. federal income and state taxes and a $0.4 million provision for excise taxes, as well as a deferred tax provision of $0.3 million. For the nine months ended September 30, 2020, Main Street recognized a net income tax benefit of $14.3 million, principally consisting of a deferred tax benefit of $15.7 million, partially offset by a $1.4 million current tax expense, which is primarily related to a $1.1 million provision for excise taxes and $0.3 million provision for current U.S. federal income and state taxes. For the three months ended September 30, 2019, Main Street recognized a net income tax benefit of $4.0 million, principally consisting of a deferred tax benefit of $5.1 million partially offset by a $1.1 million current tax expense, which is primarily related to current U.S. federal income and state taxes and excise taxes. For the nine months ended September 30, 2019, Main Street recognized a net income tax provision of $2.5 million, principally consisting of a $2.7 million current tax expense primarily related to a $2.0 million provision for current U.S. federal income and state taxes and a $0.7 million accrual for excise taxes, partially offset by a deferred tax benefit of $0.3 million. 78

Table of Contents

The net deferred tax liability at September 30, 2020 was $0.7 million compared to $16.1 million at December 31, 2019, primarily related to changes in net unrealized appreciation or depreciation, changes in loss carryforwards, and other temporary book-tax differences relating to portfolio investments held by the Taxable Subsidiaries. At September 30, 2020, for U.S. federal income tax purposes, the Taxable Subsidiaries had a net operating loss carryforward from prior years which, if unused, will expire in various taxable years from 2030 through 2037. Any net operating losses generated in 2019 and future periods are not subject to expiration and will carryforward indefinitely until utilized. The timing and manner in which Main Street will utilize any loss carryforwards generated before December 31, 2019 may be limited in the future under the provisions of the Code. Additionally, the Taxable Subsidiaries have interest expense limitation carryforwards which have an indefinite carryforward.

NOTE H—COMMON STOCK

Main Street maintains a program with certain selling agents through which it can sell shares of its common stock by means of at-the-market offerings from time to time (the “ATM Program”). During the nine months ended September 30, 2020, Main Street sold 1,154,937 shares of its common stock at a weighted-average price of $32.67 per share and raised $37.7 million of gross proceeds under the ATM Program. Net proceeds were $37.2 million after commissions to the selling agents on shares sold and offering costs. As of September 30, 2020, sales transactions representing 2,603 shares had not settled and are not included in shares issued and outstanding on the face of the consolidated balance sheet, but are included in the weighted-average shares outstanding in the consolidated statement of operations and in the shares used to calculate net asset value per share. As of September 30, 2020, 7,204,213 shares remained available for sale under the ATM Program.

During the year ended December 31, 2019, Main Street sold 2,247,187 shares of its common stock at a weighted-average price of $40.05 per share and raised $90.0 million of gross proceeds under the ATM Program. Net proceeds were $88.8 million after commissions to the selling agents on shares sold and offering costs.

NOTE I—DIVIDEND REINVESTMENT PLAN (“DRIP”)

Main Street’s DRIP provides for the reinvestment of dividends on behalf of its stockholders, unless a stockholder has elected to receive dividends in cash. As a result, if Main Street declares a cash dividend, its stockholders who have not “opted out” of the DRIP by the dividend record date will have their cash dividend automatically reinvested into additional shares of MSCC common stock. The share requirements of the DRIP may be satisfied through the issuance of shares of common stock or through open market purchases of common stock by the DRIP plan administrator. Newly issued shares will be valued based upon the final closing price of MSCC’s common stock on the valuation date determined for each dividend by Main Street’s Board of Directors. Shares purchased in the open market to satisfy the DRIP requirements will be valued based upon the average price of the applicable shares purchased, before any associated brokerage or other costs. Main Street’s DRIP is administered by its transfer agent on behalf of Main Street’s record holders and participating brokerage firms. Brokerage firms and other financial intermediaries may decide not to participate in Main Street’s DRIP but may provide a similar dividend reinvestment plan for their clients.

For the nine months ended September 30, 2020, $12.2 million of the total $120.2 million in dividends paid to stockholders represented DRIP participation. During this period, the DRIP participation requirements were satisfied with the issuance of 387,534 newly issued shares. For the nine months ended September 30, 2019, $12.7 million of the total $128.3 million in dividends paid to stockholders represented DRIP participation. During this period, the DRIP participation requirements were satisfied with the issuance of 317,369 newly issued shares. The shares disclosed above relate only to Main Street’s DRIP and exclude any activity related to broker-managed dividend reinvestment plans.

NOTE J—SHARE-BASED COMPENSATION

Main Street accounts for its share-based compensation plans using the fair value method, as prescribed by ASC 718, Compensation—Stock Compensation. Accordingly, for restricted stock awards, Main Street measured the grant date fair value based upon the market price of its common stock on the date of the grant and amortizes the fair value of the awards as share-based compensation expense over the requisite service period, which is generally the vesting term. 79

Table of Contents Main Street’s Board of Directors approves the issuance of shares of restricted stock to Main Street employees pursuant to the Main Street Capital Corporation 2015 Equity and Incentive Plan (the “Equity and Incentive Plan”). These shares generally vest over a three-year period from the grant date. The fair value is expensed over the service period, starting on the grant date. The following table summarizes the restricted stock issuances approved by Main Street’s Board of Directors under the Equity and Incentive Plan, net of shares forfeited, if any, and the remaining shares of restricted stock available for issuance as of September 30, 2020.


Restricted stock authorized under the plan		3,000,000
Less net restricted stock granted during:
Year ended December 31, 2015		(900)
Year ended December 31, 2016		(260,514)
Year ended December 31, 2017		(223,812)
Year ended December 31, 2018		(243,779)
Year ended December 31, 2019		(384,049)
Nine months ended September 30, 2020		(369,840)
Restricted stock available for issuance as of September 30, 2020		1,517,106

As of September 30, 2020, the following table summarizes the restricted stock issued to Main Street’s non-employee directors and the remaining shares of restricted stock available for issuance pursuant to the Main Street Capital Corporation 2015 Non-Employee Director Restricted Stock Plan. These shares are granted upon appointment or election to the board and vest on the day immediately preceding the annual meeting of stockholders following the respective grant date and are expensed over such service period.


Restricted stock authorized under the plan		300,000
Less net restricted stock granted during:
Year ended December 31, 2015		(6,806)
Year ended December 31, 2016		(6,748)
Year ended December 31, 2017		(5,948)
Year ended December 31, 2018		(6,376)
Year ended December 31, 2019		(6,008)
Nine months ended September 30, 2020		(11,463)
Restricted stock available for issuance as of September 30, 2020		256,651

For each of the three months ended September 30, 2020 and 2019, Main Street recognized total share-based compensation expense of $2.6 million related to the restricted stock issued to Main Street employees and non-employee directors. For the nine months ended September 30, 2020 and 2019, Main Street recognized total share-based compensation expense of $8.2 million and $7.3 million, respectively, related to the restricted stock issued to Main Street employees and non-employee directors.

As of September 30, 2020, there was $14.7 million of total unrecognized compensation expense related to Main Street’s non-vested restricted shares. This compensation expense is expected to be recognized over a remaining weighted-average period of approximately 2.0 years as of September 30, 2020.

Table of Contents NOTE K—COMMITMENTS AND CONTINGENCIES

At September 30, 2020, Main Street had the following outstanding commitments (in thousands):


Investments with equity capital commitments that have not yet funded:	****	Amount

Congruent Credit Opportunities Funds
Congruent Credit Opportunities Fund II, LP		$	8,488
Congruent Credit Opportunities Fund III, LP			8,117
		$	16,605

Encap Energy Fund Investments
EnCap Energy Capital Fund VIII, L.P.		$	24
EnCap Energy Capital Fund IX, L.P.			250
EnCap Energy Capital Fund X, L.P.			1,437
EnCap Flatrock Midstream Fund II, L.P.			4,592
EnCap Flatrock Midstream Fund III, L.P.			402
		$	6,705

EIG Fund Investments		$	3,735

Brightwood Capital Fund Investments
Brightwood Capital Fund III, LP		$	3,000
Brightwood Capital Fund IV, LP			250
		$	3,250

Freeport Fund Investments
Freeport Financial SBIC Fund LP		$	1,375
Freeport First Lien Loan Fund III LP			1,715
		$	3,090

LKCM Headwater Investments I, L.P.		$	2,500

UnionRock Energy Fund II, LP		$	2,248

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	****	Amount
Harris Preston Fund Investments
HPEP 3, L.P.		$	1,929

Dos Rios Partners
Dos Rios Partners, LP		$	835
Dos Rios Partners - A, LP			265
		$	1,100

Access Media Holdings, LLC		$	284

Total equity commitments		$	41,446

Investments with commitments to fund revolving loans that have not been fully drawn or term loans with additional commitments not yet funded:

SI East, LLC		$	7,500
Pearl Meyer Topco LLC			5,000
Adams Publishing Group, LLC			5,000
Fortna, Inc.			4,730
Market Force Information, LLC			4,100
Classic H&G Holdco, LLC			4,000
Electronic Transaction Consultants, LLC			3,704
Bluestem Brands, Inc.			3,500
GS HVAM Intermediate, LLC			3,409
Ian, Evan & Alexander Corporation (EverWatch)			3,333
Hunter Defense Technologies, Inc.			3,230
RTIC Subsidiary Holdings, LLC			2,740
Echo US Holdings, LLC.			2,586
Superior Rigging & Erecting Co.			2,500
PPL RVs, Inc.			2,000
Lynx FBO Operating LLC			1,875
Cody Pools, Inc.			1,600
Chamberlin Holding LLC			1,600
Direct Marketing Solutions, Inc.			1,600
Trantech Radiator Topco, LLC			1,600
GRT Rubber Technologies LLC			1,340
Project Eagle Holdings, LLC			1,250
Gamber-Johnson Holdings, LLC			1,200
LL Management, Inc.(Lab Logistics)			1,182
Invincible Boat Company, LLC.			1,080
Hawk Ridge Systems, LLC			1,016
CompareNetworks Topco, LLC			1,000
NRI Clinical Research, LLC			1,000
Analytical Systems Keco, LLC			800
CTVSH, PLLC			800
Mystic Logistics Holdings, LLC			800
DTE Enterprises RLOC			750
NinjaTrader, LLC			750
Mac Lean-Fogg Company			735
ASC Interests, LLC			700
PT Network, LLC			658
Wireless Vision Holdings, LLC			592
Tedder Industries, LLC			560
Jensen Jewelers of Idaho, LLC			500
Coastal Television Broadcasting Holdings LLC			500
American Nuts, LLC			281
Dynamic Communities, LLC			250
Arcus Hunting LLC			241

Total loan commitments		$	83,592

Total commitments		$	125,038

Main Street will fund its unfunded commitments from the same sources it uses to fund its investment commitments that are funded at the time they are made (which are typically through existing cash and cash equivalents and borrowings under the Credit Facility). Main Street follows a process to manage its liquidity and ensure that it has 82

Table of Contents available capital to fund its unfunded commitments as necessary. The Company had total unrealized depreciation of $0.5 million on the outstanding unfunded commitments as of September 30, 2020.

Effective January 1, 2019, ASC 842 required that a lessee evaluate its leases to determine whether they should be classified as operating or financing leases. Main Street identified one operating lease for its office space. The lease commenced May 15, 2017 and expires January 31, 2028. It contains two five-year extension options for a final expiration date of January 31, 2038.

As Main Street classified this lease as an operating lease prior to implementation, ASC 842-10-65-1 indicates that a right-of-use asset and lease liability should be recorded based on the effective date. Main Street adopted ASC 842 effective January 1, 2019 and recorded a right-of-use asset and a lease liability as of that date. After this date, Main Street has recorded lease expense on a straight-line basis, consistent with the accounting treatment for lease expense prior to the adoption of ASC 842.

Total operating lease cost incurred by Main Street for each of the three months ended September 30, 2020 and 2019 was $0.2 million. Total operating lease cost incurred by Main Street for each of the nine months ended September 30, 2020 and 2019 was $0.5 million. As of September 30, 2020, the asset related to the operating lease was $4.4 million and is included in the interest receivable and other assets balance on the consolidated balance sheet. The lease liability was $5.1 million and is included in the accounts payable and other liabilities balance on the consolidated balance sheet. As of September 30, 2020, the remaining lease term was 7.3 years and the discount rate was 4.2%.

The following table shows future minimum payments under Main Street’s operating lease as of September 30, 2020 (in thousands):


For the Years Ended December 31,	Amount
2020	$	191
2021		776
2022		790
2023		804
2024		818
Thereafter		2,610
Total	$	5,989

Main Street may, from time to time, be involved in litigation arising out of its operations in the normal course of business or otherwise. Furthermore, third parties may try to impose liability on Main Street in connection with the activities of its portfolio companies. While the outcome of any current legal proceedings cannot at this time be predicted with certainty, Main Street does not expect any current matters will materially affect its financial condition or results of operations; however, there can be no assurance whether any pending legal proceedings will have a material adverse effect on Main Street’s financial condition or results of operations in any future reporting period.

NOTE L—RELATED PARTY TRANSACTIONS

As discussed further in Note D, the External Investment Manager is treated as a wholly owned portfolio company of MSCC and is included as part of Main Street’s Investment Portfolio. At September 30, 2020, Main Street had a receivable of approximately $2.4 million due from the External Investment Manager, which included (i) approximately $2.0 million related primarily to operating expenses incurred by MSCC or its subsidiaries as required to support the External Investment Manager’s business and amounts due from the External Investment Manager to Main Street under a tax sharing agreement (see further discussion in Note D) and (ii) approximately $0.3 million of dividends declared but not paid by the External Investment Manager.

In November 2015, Main Street’s Board of Directors approved and adopted the Main Street Capital Corporation Deferred Compensation Plan (the “2015 Deferred Compensation Plan”). The 2015 Deferred Compensation Plan became effective on January 1, 2016 and replaced the Deferred Compensation Plan for Non-Employee Directors previously adopted by the Board of Directors in June 2013 (the “2013 Deferred Compensation Plan”). Under the 2015 Deferred Compensation Plan, non-employee directors and certain key employees may defer receipt of some or all of their cash compensation and directors’ fees, subject to certain limitations. Individuals participating in the 2015 Deferred 83

Table of Contents Compensation Plan receive distributions of their respective balances based on predetermined payout schedules or other events as defined by the plan and are also able to direct investments made on their behalf among investment alternatives permitted from time to time under the plan, including phantom Main Street stock units. As of September 30, 2020, $10.0 million of compensation and directors’ fees had been deferred under the 2015 Deferred Compensation Plan (including amounts previously deferred under the 2013 Deferred Compensation Plan). Of this amount, $5.0 million was deferred into phantom Main Street stock units, representing 152,633 shares of Main Street’s common stock. Including phantom stock units issued through dividend reinvestment and net of any shares distributed, the phantom stock units outstanding as of September 30, 2020 represented 157,201 shares of Main Street’s common stock. Any amounts deferred under the plan represented by phantom Main Street stock units will not be issued or included as outstanding on the consolidated statements of changes in net assets until such shares are actually distributed to the participant in accordance with the plan, but the related phantom stock units are included in weighted-average shares outstanding with the related dollar amount of the deferral included in total expenses in Main Street’s consolidated statements of operations as earned. The dividend amounts related to additional phantom stock units are included in the statements of changes in net assets as an increase to dividends to stockholders offset by a corresponding increase to additional paid-in capital.

NOTE M—SUBSEQUENT EVENTS

After successfully receiving the required approval of HMS Income’s stockholders, effective October 30, 2020, the External Investment Manager and HMS Adviser consummated the transactions contemplated by that certain asset purchase agreement by and among the External Investment Manager, HMS Adviser and the other parties thereto (the “Closing”) whereby the External Investment Manager became the sole investment adviser and administrator to HMS Income pursuant to an Investment Advisory and Administrative Services Agreement entered into between the External Investment Manager and HMS Income (the “Advisory Agreement”) and HMS Income changed its name to MSC Income Fund, Inc. The Advisory Agreement includes a 1.75% management fee, reduced from 2.00%, and the same incentive fee as under HMS Income’s prior advisory agreement with HMS Adviser, with the External Investment Manager receiving 100% of such fee income (increased from 50% previously).

During November 2020, Main Street declared regular monthly dividends of $0.205 per share for each month of January, February and March of 2021. These regular monthly dividends equal a total of $0.615 per share for the first quarter of 2021, unchanged from the regular monthly dividends paid in the first quarter of 2020. Including the regular monthly dividends declared for the fourth quarter of 2020 and first quarter of 2021, Main Street will have paid $30.215 per share in cumulative dividends since its October 2007 initial public offering.

Also, during November 2020, Main Street expanded its total commitments under the Credit Facility from $740.0 million to $780.0 million. The $40.0 million net increase in total commitments was the result of the addition of a new lender relationship, which further diversifies the Main Street lending group under the Credit Facility to a total of 19 participants. The recent increase in total commitments was executed under the accordion feature of the Credit Facility, which allows for an increase up to $800.0 million in total commitments under the facility from new and existing lenders on the same terms and conditions as the existing commitments.

Table of Contents Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments In and Advances to Affiliates

September 30, 2020

(dollars in thousands)

(unaudited)


												Amount of
												Interest,
												Fees or
						Amount of			Amount of			Dividends			December 31,									September 30,
						Realized			Unrealized			Credited to			2019			Gross			Gross			2020
Company	****	Investment(1)(10)(11)	****	Geography	****	Gain/(Loss)		****	Gain/(Loss)		****	Income(2)		****	Fair Value		****	Additions(3)		****	Reductions(4)		****	Fair Value
Majority‑owned investments
Café Brazil, LLC		Member Units		(8)		$	—		$	(410)		$	38		$	2,440		$	—		$	410		$	2,030
California Splendor Holdings LLC		LIBOR Plus 8.00% (Floor 1.00%)		(9)			—			(40)			826			7,104			18,200			5,840			19,464
		LIBOR Plus 10.00% (Floor 1.00%)		(9)			—			(65)			2,490			27,801			39			65			27,775
		Preferred Member Units		(9)			—			—			818			7,163			818			1			7,980
		Preferred Member Units		(9)			—			(1,141)			188			7,382			—			1,141			6,241
Clad-Rex Steel, LLC		LIBOR Plus 9.50% (Floor 1.00%)		(5)			—			49			897			10,781			66			—			10,847
		Member Units		(5)			—			(1,020)			317			9,630			—			1,020			8,610
		10% Secured Debt		(5)			—			(11)			85			1,137			—			30			1,107
		Member Units		(5)			—			—			—			460			—			—			460
CMS Minerals Investments		Member Units		(9)			—			(69)			—			1,900			—			203			1,697
Cody Pools, Inc.		LIBOR Plus 10.50% (Floor 1.75%)		(8)			—			143			1,320			—			16,000			400			15,600
		Preferred Member Units		(8)			—			3,523			58			—			11,840			—			11,840
CompareNetworks Topco, LLC		LIBOR Plus 11.00% (Floor 1.00%)		(9)			—			—			826			8,288			2,019			910			9,397
		Preferred Member Units		(9)			—			2,350			—			3,010			2,350			—			5,360
Direct Marketing Solutions, Inc.		LIBOR Plus 11.00% (Floor 1.00%)		(9)			—			(18)			1,464			15,707			36			653			15,090
		Preferred Stock		(9)			—			(140)			—			20,200			—			140			20,060
Gamber-Johnson Holdings, LLC		LIBOR Plus 6.50% (Floor 2.00%)		(5)			—			(26)			1,303			19,022			1,626			810			19,838
		Member Units		(5)			—			(170)			3,054			53,410			—			170			53,240
GRT Rubber Technologies LLC		LIBOR Plus 7.00%		(8)			—			—			988			15,016			1,759			—			16,775
		Member Units		(8)			—			(2,020)			2,593			47,450			—			2,020			45,430
Guerdon Modular Holdings, Inc.		16.00% Secured Debt		(9)			(12,776)			12,588			—			—			12,776			12,776			—
		LIBOR Plus 8.50% (Floor 1.00%)		(9)			(993)			1,010			—			—			993			993			—
		Preferred Stock		(9)			(1,140)			1,140			—			—			1,140			1,140			—
		Common Stock		(9)			(2,849)			2,983			—			—			2,849			2,849			—
		Warrants		(9)			—			—			—			—			—			—			—
Harborside Holdings, LLC		Member Units		(8)			—			(4,640)			—			9,560			100			4,640			5,020
IDX Broker, LLC		11.00% Secured Debt		(9)			—			(42)			711			13,400			42			13,442			—
		Preferred Member Units		(9)			9,337			(9,088)			1,193			15,040			—			15,040			—
Jensen Jewelers of Idaho, LLC		Prime Plus 6.75% (Floor 2.00%)		(9)			—			(56)			324			4,000			10			356			3,654
		Member Units		(9)			—			(1,000)			236			8,270			—			1,000			7,270
Kickhaefer Manufacturing Company, LLC		9.50% Current/2.00% PIK Secured Debt		(5)			—			—			2,247			24,982			1,414			2,947			23,449
		Member Units		(5)			—			(90)			—			12,240			—			90			12,150
		9.00% Secured Debt		(5)			—			—			268			3,939			—			22			3,917
		Member Units		(5)			—			—			68			1,160			—			—			1,160
Market Force Information, LLC		12.00% PIK Secured Debt		(9)			—			(11,612)			242			22,621			2,795			11,704			13,712
		LIBOR Plus 11.00% (Floor 1.00%)		(9)			—			—			78			2,695			1,091			2,886			900
		Member Units		(9)			—			(5,280)			—			5,280			—			5,280			—
MH Corbin Holding LLC		13.00% Secured Debt		(5)			—			(76)			888			8,890			24			316			8,598
		Preferred Member Units		(5)			—			(20)			—			20			—			20			—
		Preferred Member Units		(5)			—			(1,810)			—			4,770			—			1,810			2,960
Mid-Columbia Lumber Products, LLC		10.00% Secured Debt		(9)			—			148			44			1,602			148			1,750			—
		12.00% Secured Debt		(9)			—			256			119			3,644			256			3,900			—
		Member Units		(9)			(1)			(1,000)			1			—			101			101			—
		9.50% Secured Debt		(9)			—			—			30			701			19			720			—
		Member Units		(9)			—			(959)			20			1,640			709			959			1,390
MSC Adviser I, LLC		Member Units		(8)			—			(3,440)			1,394			74,520			—			3,440			71,080
Mystic Logistics Holdings, LLC		12.00% Secured Debt		(6)			—			—			605			6,253			988			520			6,721
		Common Stock		(6)			—			1,760			—			8,410			1,760			—			10,170
OMi Holdings, Inc.		Common Stock		(8)			—			2,480			543			16,950			2,480			—			19,430
Pearl Meyer Topco LLC		12.00% Secured Debt		(6)			—			—			2,243			—			34,676			—			34,676
		Member Units		(6)			—			—			269			—			13,800			800			13,000

Table of Contents


												Amount of
												Interest,
												Fees or
						Amount of			Amount of			Dividends			December 31,									September 30,
						Realized			Unrealized			Credited to			2019			Gross			Gross			2020
Company	****	Investment(1)(10)(11)	****	Geography	****	Gain/(Loss)		****	Gain/(Loss)		****	Income(2)		****	Fair Value		****	Additions(3)		****	Reductions(4)		****	Fair Value
PPL RVs, Inc.		LIBOR Plus 8.75% PIK (Floor 0.50%)		(8)			—			—			964			12,118			149			500			11,767
		Common Stock		(8)			—			1,210			—			9,930			1,210			—			11,140
Principle Environmental, LLC (d/b/a TruHorizon Environmental Solutions)		13.00% Secured Debt		(8)			—			50			658			6,397			—			—			6,397
		Preferred Member Units		(8)			—			(2,160)			—			13,390			—			2,160			11,230
		Warrants		(8)			—			(160)			—			1,090			—			160			930
Quality Lease Service, LLC		Member Units		(7)			—			(4,880)			—			9,289			301			4,880			4,710
Trantech Radiator Topco, LLC		12.00% Secured Debt		(7)			—			69			832			9,102			86			480			8,708
		Common Stock		(7)			—			3,115			87			4,655			3,115			1			7,769
Vision Interests, Inc.		13.00% Secured Debt		(9)			—			—			201			2,028			—			—			2,028
		Series A Preferred Stock		(9)			—			(630)			—			4,089			—			630			3,459
		Common Stock		(9)			(3,586)			3,296			—			409			3,296			3,705			—
Ziegler’s NYPD, LLC		6.50% Secured Debt		(8)			—			(21)			49			1,000			—			21			979
		12.00% Secured Debt		(8)			—			—			57			625			—			—			625
		14.00% Secured Debt		(8)			—			(35)			293			2,750			—			35			2,715
		Warrants		(8)			—			—			—			—			—			—			—
		Preferred Member Units		(8)			—			(130)			—			1,269			—			130			1,139
Other controlled investments
Access Media Holdings, LLC		10.00% PIK Secured Debt		(5)			—			(2,449)			38			6,387			—			2,449			3,938
		Preferred Member Units		(5)			—			—			—			(284)			—			—			(284)
		Member Units		(5)			—			—			—			—			—			—			—
Analytical Systems Keco, LLC		LIBOR Plus 10.00% (Floor 2.00%)		(8)			—			—			546			5,210			55			340			4,925
		Preferred Member Units		(8)			—			—			—			3,200			—			—			3,200
		Warrants		(8)			—			34			—			316			34			—			350
ASC Interests, LLC		13.00% Secured Debt		(8)			—			—			176			1,639			—			28			1,611
		Member Units		(8)			—			(240)			—			1,290			—			240			1,050
ATS Workholding, LLC		5.00% Secured Debt		(9)			—			(1,230)			282			4,521			136			1,250			3,407
		Preferred Member Units		(9)			—			(939)			—			939			—			939			—
Bond-Coat, Inc.		15.00% Secured Debt		(8)			—			—			1,399			11,473			123			11,596			—
		Common Stock		(8)			—			(4,990)			—			8,300			—			4,990			3,310
Brewer Crane Holdings, LLC		LIBOR Plus 10.00% (Floor 1.00%)		(9)			—			—			767			8,989			15			372			8,632
		Preferred Member Units		(9)			—			1,330			90			4,280			1,330			—			5,610
Bridge Capital Solutions Corporation		13.00% Secured Debt		(6)			—			—			1,316			7,797			443			—			8,240
		Warrants		(6)			—			(500)			—			3,500			—			500			3,000
		13.00% Secured Debt		(6)			—			—			101			996			2			—			998
		Preferred Member Units		(6)			—			—			75			1,000			—			—			1,000
CBT Nuggets, LLC		Member Units		(9)			—			(5,120)			954			50,850			—			5,120			45,730
Centre Technologies Holdings, LLC		LIBOR Plus 10.00% (Floor 2.00%)		(8)			—			—			1,114			12,136			19			459			11,696
		Preferred Member Units		(8)			—			220			90			5,840			220			—			6,060
Chamberlin Holding LLC		LIBOR Plus 10.00% (Floor 1.00%)		(8)			—			(35)			1,551			17,773			35			1,835			15,973
		Member Units		(8)			—			3,960			2,915			24,040			3,960			—			28,000
		Member Units		(8)			—			(530)			51			1,450			—			530			920
Charps, LLC		15.00% Secured Debt		(5)			—			—			223			2,000			—			154			1,846
		8.67% Current / 1.33% PIK		(5)			—			596			186			—			8,507			—			8,507
		Preferred Member Units		(5)			—			2,480			455			6,920			2,480			—			9,400
Copper Trail Fund Investments		LP Interests (CTMH, LP)		(9)			—			—			—			872			—			125			747
Datacom, LLC		8.00% Secured Debt		(8)			—			—			—			1,615			—			—			1,615
		10.50% PIK Secured Debt		(8)			—			—			—			10,142			—			—			10,142
		Class A Preferred Member Units		(8)			—			—			—			—			—			—			—
		Class B Preferred Member Units		(8)			—			—			—			—			—			—			—
Digital Products Holdings LLC		LIBOR Plus 10.00% (Floor 1.00%)		(5)			—			643			1,655			18,452			678			1,117			18,013
		Preferred Member Units		(5)			—			1,734			150			5,174			1,734			—			6,908
Garreco, LLC		LIBOR Plus 8.00% (Floor 1.00%, Ceiling 1.50%)		(8)			—			—			324			4,515			4			—			4,519
		Member Units		(8)			—			(860)			—			2,560			—			860			1,700
Gulf Manufacturing, LLC		Member Units		(8)			—			(3,030)			135			7,430			—			3,030			4,400

Table of Contents



												Amount of
												Interest,
												Fees or
						Amount of			Amount of			Dividends			December 31,									September 30,
						Realized			Unrealized			Credited to			2019			Gross			Gross			2020
Company	****	Investment(1)(10)(11)	****	Geography	****	Gain/(Loss)		****	Gain/(Loss)		****	Income(2)		****	Fair Value		****	Additions(3)		****	Reductions(4)		****	Fair Value
Gulf Publishing Holdings, LLC		LIBOR Plus 9.50% (Floor 1.00%), Current Coupon 5.25% / 5.25% PIK		(8)			—			—			21			280			10			43			247
		6.25% Current / 6.25% PIK		(8)			—			(1,091)			1,226			12,493			630			1,295			11,828
		Member Units		(8)			—			(2,420)			—			2,420			—			2,420			—
Harris Preston Fund Investments		LP Interests (2717 MH, L.P.)		(8)			—			120			—			3,157			172			52			3,277
Harrison Hydra-Gen, Ltd.		Common Stock		(8)			—			(2,330)			104			7,970			—			2,330			5,640
J&J Services, Inc.		11.50% Secured Debt		(7)			—			122			1,508			17,430			170			3,200			14,400
		Preferred Stock		(7)			—			4,835			—			7,160			4,835			75			11,920
KBK Industries, LLC		Member Units		(5)			—			(2,330)			446			15,470			—			2,330			13,140
NAPCO Precast, LLC		Member Units		(8)			—			(2,280)			425			14,760			—			2,280			12,480
NexRev LLC		11.00% PIK Secured Debt		(8)			—			(596)			1,483			17,469			191			1,032			16,628
		Preferred Member Units		(8)			—			(5,360)			(55)			6,310			—			5,360			950
NRI Clinical Research, LLC		10.50% Secured Debt		(9)			—			(35)			598			5,981			1,554			1,415			6,120
		Warrants		(9)			—			160			—			1,230			160			—			1,390
		Member Units		(9)			—			333			377			4,988			710			377			5,321
NRP Jones, LLC		12.00% Secured Debt		(5)			—			—			582			6,376			—			—			6,376
		Member Units		(5)			—			(1,400)			25			4,710			—			1,400			3,310
NuStep, LLC		12.00% Secured Debt		(5)			—			—			1,832			19,703			32			160			19,575
		Preferred Member Units		(5)			—			—			—			10,200			—			—			10,200
Pegasus Research Group, LLC		Member Units		(8)			—			1,530			491			8,170			1,530			—			9,700
River Aggregates, LLC		Zero Coupon Secured Debt		(8)			—			28			—			722			28			750			—
		Member Units		(8)			4,015			(3,840)			187			4,990			—			4,990			—
		Member Units		(8)			—			221			—			3,169			221			—			3,390
Tedder Industries, LLC		12.00% Secured Debt		(9)			—			—			1,582			16,912			22			—			16,934
		Preferred Member Units		(9)			—			—			—			8,136			—			—			8,136
UnionRock Energy Fund II, LP		LP Interests		(9)			—			—			—			—			2,894			—			2,894
Other
Amounts related to investments transferred to or from other 1940 Act classification during the period							(7,832)			4,252			3			4,564			—			—			—
Total Control investments						$	(15,825)		$	(35,096)		$	57,357		$	1,032,721		$	174,015		$	181,459		$	1,020,713
Affiliate Investments
AFG Capital Group, LLC		10.00% Secured Debt		(8)		$	—		$	—		$	53		$	838		$	—		$	260		$	578
		Preferred Member Units		(8)			—			180			—			5,180			180			—			5,360
American Trailer Rental Group LLC		LIBOR Plus 7.25% (Floor 1.00%)		(5)			—			(182)			1,119			27,087			182			27,269			—
		Member Units		(5)			—			1,269			—			8,540			5,010			—			13,550
BBB Tank Services, LLC		LIBOR Plus 11.00% (Floor 1.00%)		(8)			—			(51)			501			4,698			55			51			4,702
		Preferred Member Units		(8)			—			—			15			131			15			—			146
		Member Units		(8)			—			(80)			—			290			—			80			210
Boccella Precast Products LLC		LIBOR Plus 10.00% (Floor 1.00%)		(6)			—			(138)			982			13,244			138			13,382			—
		Member Units		(6)			—			(670)			424			6,270			—			670			5,600
Buca C, LLC		LIBOR Plus 9.25% (Floor 1.00%)		(7)			—			(1,326)			1,534			18,794			23			1,326			17,491
		Preferred Member Units		(7)			—			(4,005)			69			4,701			69			4,005			765
CAI Software LLC		12.50% Secured Debt		(6)			—			84			1,897			9,160			19,500			2,053			26,607
		Member Units		(6)			—			369			10			5,210			720			—			5,930
Chandler Signs Holdings, LLC		Class A Units		(8)			—			(690)			(91)			2,740			—			690			2,050
Charlotte Russe, Inc		Common Stock		(9)			—			—			—			—			—			—			—
Classic H&G Holdings, LLC		12.00% Secured Debt		(6)			—			227			2,338			—			26,000			1,200			24,800
		Preferred Member Units		(6)			—			2,790			259			—			8,550			—			8,550
Congruent Credit Opportunities Funds		LP Interests (Fund II)		(8)			—			—			—			855			—			—			855
		LP Interests (Fund III)		(8)			—			(399)			576			13,915			—			1,819			12,096
Copper Trail Fund Investments		LP Interests (Copper Trail Energy Fund I, LP)		(9)			—			(672)			597			2,362			—			508			1,854
Dos Rios Partners		LP Interests (Dos Rios Partners, LP)		(8)			—			(759)			—			7,033			759			759			7,033
		LP Interests (Dos Rios Partners - A, LP)		(8)			—			(241)			—			2,233			241			241			2,233
East Teak Fine Hardwoods, Inc.		Common Stock		(7)			—			(100)			4			400			—			100			300

Table of Contents


												Amount of
												Interest,
												Fees or
						Amount of			Amount of			Dividends			December 31,									September 30,
						Realized			Unrealized			Credited to			2019			Gross			Gross			2020
Company	****	Investment(1)(10)(11)	****	Geography	****	Gain/(Loss)		****	Gain/(Loss)		****	Income(2)		****	Fair Value		****	Additions(3)		****	Reductions(4)		****	Fair Value
EIG Fund Investments		LP Interests (EIG Global Private Debt fund-A, L.P.)		(8)			6			(165)			104			720			110			304			526
Freeport Financial Funds		LP Interests (Freeport Financial SBIC Fund LP)		(5)			—			(697)			—			5,778			—			697			5,081
		LP Interests (Freeport First Lien Loan Fund III LP)		(5)			—			(204)			631			9,696			989			364			10,321
Harris Preston Fund Investments		LP Interests (HPEP 3, L.P.)		(8)			—			—			—			2,474			597			—			3,071
Hawk Ridge Systems, LLC		LIBOR Plus 6.00% (Floor 1.00%)		(9)			—			—			41			600			384			—			984
		11.00% Secured Debt		(9)			—			(23)			1,230			13,400			3,023			23			16,400
		Preferred Member Units		(9)			—			130			69			7,900			130			—			8,030
		Preferred Member Units		(9)			—			—			—			420			—			—			420
Houston Plating and Coatings, LLC		8.00% Unsecured Convertible Debt		(8)			—			(1,260)			183			4,260			—			1,260			3,000
		Member Units		(8)			—			(4,270)			163			10,330			—			4,270			6,060
I-45 SLF LLC		Member Units		(8)			—			(2,215)			1,803			14,407			3,200			2,215			15,392
L.F. Manufacturing Holdings, LLC		Preferred Member Units		(8)			—			—			9			81			9			—			90
		Member Units		(8)			—			—			—			2,050			—			—			2,050
OnAsset Intelligence, Inc.		12.00% PIK Secured Debt		(8)			—			—			609			6,474			710			100			7,084
		10.00% PIK Secured Debt		(8)			—			—			4			58			6			1			63
		Preferred Stock		(8)			—			—			—			—			—			—			—
		Warrants		(8)			—			—			—			—			—			—			—
PCI Holding Company, Inc.		12.00% Current Secured Debt		(9)			—			—			1,037			11,356			—			—			11,356
		Preferred Stock		(9)			—			1,750			—			2,680			1,750			—			4,430
		Preferred Stock		(9)			—			—			—			4,350			—			—			4,350
Rocaceia, LLC (Quality Lease and Rental Holdings, LLC)		12.00% Secured Debt		(8)			(413)			—			—			—			413			413			—
		Preferred Member Units		(8)			—			—			—			—			—			—			—
Salado Stone Holdings, LLC		Class A Preferred Units		(8)			—			200			—			570			200			—			770
SI East, LLC		9.50% Current, Secured Debt		(7)			—			(55)			2,459			32,963			54			55			32,962
		Preferred Member Units		(7)			—			1,520			1,292			8,200			1,520			—			9,720
Slick Innovations, LLC		14.00% Current, Secured Debt		(6)			—			131			701			6,197			163			280			6,080
		Warrants		(6)			—			40			—			290			40			—			330
		Common Stock		(6)			—			170			—			1,080			170			—			1,250
Superior Rigging & Erecting Co.		12.00% Current, Secured Debt		(7)			—			—			443			—			21,290			—			21,290
		Preferred Member Units		(7)			—			—			—			—			4,500			—			4,500
UniTek Global Services, Inc.		LIBOR Plus 6.50% (Floor 1.00%)		(6)			—			(283)			178			2,962			15			306			2,671
		Preferred Stock		(6)			—			(2,684)			—			2,684			—			2,684			—
		Preferred Stock		(6)			—			(771)			212			2,282			212			771			1,723
		Preferred Stock		(6)			—			382			185			1,889			945			1			2,833
		Preferred Stock		(6)			—			(3,667)			—			3,667			—			3,667			—
		Common Stock		(6)			—			—			—			—			—			—			—
Universal Wellhead Services Holdings, LLC		Preferred Member Units		(8)			—			(800)			—			800			—			800			—
		Member Units		(8)			—			—			—			—			—			—			—
Volusion, LLC		11.50% Secured Debt		(8)			—			(181)			1,843			19,352			72			181			19,243
		8.00% Unsecured Convertible Debt		(8)			—			—			25			291			—			1			290
		Preferred Member Units		(8)			—			(9,050)			—			14,000			—			9,050			4,950
		Warrants		(8)			—			(150)			—			150			—			150			—
Other
Amounts related to investments transferred to or from other1940 Act classification during the period							—			(337)			118			2,195			—			—			—
Total Affiliate investments						$	(407)		$	(26,883)		$	23,626		$	330,287		$	101,944		$	82,006		$	348,030

(1)	The principal amount, the ownership detail for equity investments and if the investment is income producing is included in the consolidated schedule of investments.
(2)	Represents the total amount of interest, fees and dividends credited to income for the portion of the period for which an investment was included in Control or Affiliate categories, respectively. For investments transferred between Control and Affiliate categories during the period, any income or investment balances related to the time period it was in the category other than the one shown at period end is included in “Amounts from investments transferred from other 1940 Act classifications during the period.”
---	---
(3)	Gross additions include increases in the cost basis of investments resulting from new portfolio investments, follow-on investments and accrued PIK interest, and the exchange of one or more existing securities for one or more
---	---

Table of Contents

new securities. Gross additions also include net increases in unrealized appreciation or net decreases in net unrealized depreciation as well as the movement of an existing portfolio company into this category and out of a different category.
(4)	Gross reductions include decreases in the cost basis of investments resulting from principal repayments or sales and the exchange of one or more existing securities for one or more new securities. Gross reductions also include net increases in net unrealized depreciation or net decreases in unrealized appreciation as well as the movement of an existing portfolio company out of this category and into a different category.
---	---
(5)	Portfolio company located in the Midwest region as determined by location of the corporate headquarters. The fair value as of September 30, 2020 for control investments located in this region was $247,265. This represented 17.4% of net assets as of September 30, 2020. The fair value as of September 30, 2020 for affiliate investments located in this region was $28,952. This represented 2.0% of net assets as of September 30, 2020.
---	---
(6)	Portfolio company located in the Northeast region as determined by location of the corporate headquarters. The fair value as of September 30, 2020 for control investments located in this region was $77,805. This represented 5.5% of net assets as of September 30, 2020. The fair value as of September 30, 2020 for affiliate investments located in this region was $86,374. This represented 6.1% of net assets as of September 30, 2020.
---	---
(7)	Portfolio company located in the Southeast region as determined by location of the corporate headquarters. The fair value as of September 30, 2020 for control investments located in this region was $47,507. This represented 3.3% of net assets as of September 30, 2020. The fair value as of September 30, 2020 for affiliate investments located in this region was $87,028. This represented 6.1% of net assets as of September 30, 2020.
---	---
(8)	Portfolio company located in the Southwest region as determined by location of the corporate headquarters. The fair value as of September 30, 2020 for control investments located in this region was $397,738. This represented 27.9% of net assets as of September 30, 2020. The fair value as of September 30, 2020 for affiliate investments located in this region was $97,852. This represented 6.9% of net assets as of September 30, 2020.
---	---
(9)	Portfolio company located in the West region as determined by location of the corporate headquarters. The fair value as of September 30, 2020 for control investments located in this region was $250,398. This represented 17.6% of net assets as of September 30, 2020. The fair value as of September 30, 2020 for affiliate investments located in this region was $47,824. This represented 3.4% of net assets as of September 30, 2020.
---	---
(10)	All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities,” unless otherwise noted.
---	---
(11)	This schedule should be read in conjunction with the consolidated schedule of investments and notes to the consolidated financial statements. Supplemental information can be located within the schedule of investments including end of period interest rate, preferred dividend rate, maturity date, investments not paid currently in cash and investments whose value was determined using significant unobservable inputs.
---	---
(12)	Investment has an unfunded commitment as of December 31, 2019 (see Note K). The fair value of the investment includes the impact of the fair value of any unfunded commitments.
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Table of Contents Schedule 12-14

MAIN STREET CAPITAL CORPORATION

Consolidated Schedule of Investments in and Advances to Affiliates

September 30, 2019

(dollars in thousands)

(unaudited)


	****		****		****			****			****	Amount of		****			****			****			****
												Interest,
												Fees or
						Amount of			Amount of			Dividends			December 31,									September 30,
						Realized			Unrealized			Credited to			2018			Gross			Gross			2019
Company		Investment(1)(10)(11)		Geography		Gain/(Loss)			Gain/(Loss)			Income(2)			Fair Value			Additions(3)			Reductions(4)			Fair Value
Majority‑owned investments	****	****	****	****	****		****	****		****	****			****		****	****		****	****		****	****		****
Analytical Systems Keco, LLC		LIBOR Plus 10.00% (Floor 2.00%)		(8)		$	—		$	—		$	259		$	—		$	5,229		$	—		$	5,229
		Preferred Member Units		(8)			—			—			—			—			3,200			—			3,200
		Warrants		(8)			—			—			—			—			316			—			316
Café Brazil, LLC		Member Units		(8)			—			(970)			193			4,780			—			970			3,810
California Splendor Holdings LLC		LIBOR Plus 8.00% (Floor 1.00%)		(9)			—			—			922			10,928			15,667			11,751			14,844
		LIBOR Plus 10.00% (Floor 1.00%)		(9)			—			—			2,715			27,755			34			—			27,789
		Preferred Member Units		(9)			—			—			178			—			7,178			—			7,178
		Preferred Member Units		(9)			—			(2,363)			188			9,745			—			2,363			7,382
Clad-Rex Steel, LLC		LIBOR Plus 9.00% (Floor 1.00%)		(5)			—			(21)			1,049			12,080			21			821			11,280
		Member Units		(5)			—			(590)			217			10,610			—			590			10,020
		10% Secured Debt		(5)			—			—			87			1,161			—			18			1,143
		Member Units		(5)			—			—			—			350			—			—			350
CMS Minerals Investments		Member Units		(9)			—			(359)			41			2,580			—			634			1,946
CompareNetworks Topco, LLC		LIBOR Plus 11.00% (Floor 1.00%)		(9)			—			—			982			—			8,916			250			8,666
		Preferred Member Units		(9)			—			1,035			2			—			3,010			—			3,010
Direct Marketing Solutions, Inc.		LIBOR Plus 11.00% (Floor 1.00%)		(9)			—			125			1,834			17,848			158			1,185			16,821
		Preferred Stock		(9)			—			2,980			—			14,900			2,980			—			17,880
Gamber-Johnson Holdings, LLC		LIBOR Plus 7.00% (Floor 2.00%)		(5)			—			(46)			1,553			21,486			46			2,510			19,022
		Member Units		(5)			—			1,050			2,666			45,460			1,050			—			46,510
GRT Rubber Technologies LLC		LIBOR Plus 7.00%		(8)			—			(17)			881			9,740			5,293			17			15,016
		Member Units		(8)			—			6,910			8,728			39,060			6,910			—			45,970
Guerdon Modular Holdings, Inc.		16% Secured Debt		(9)			—			(3,711)			424			12,002			16			3,711			8,307
		LIBOR Plus 8.50% (Floor 1.00%)		(9)			—			—			9			—			464			—			464
		Preferred Stock		(9)			—			—			—			—			—			—			—
		Common Stock		(9)			(6)			—			—			—			6			6			—
		Warrants		(9)			—			—			—			—			—			—			—
Harborside Holdings, LLC		Member Units		(8)			—			(140)			—			9,500			200			140			9,560
IDX Broker, LLC		11.5% Secured Debt		(9)			—			(35)			1,259			14,350			35			685			13,700
		Preferred Member Units		(9)			—			990			276			13,520			990			—			14,510
Jensen Jewelers of Idaho, LLC		Prime Plus 6.75% (Floor 2.00%)		(9)			—			(15)			302			3,355			15			465			2,905
		Member Units		(9)			—			1,930			245			5,090			1,930			—			7,020
Kickhaefer Manufacturing Company, LLC		11.5% Secured Debt		(5)			—			—			2,460			28,775			42			1,864			26,953
		Member Units		(5)			—			—			—			12,240			—			—			12,240
		9.0% Secured Debt		(5)			—			—			267			3,970			—			24			3,946
		Member Units		(5)			—			—			94			992			—			—			992
Lamb Ventures, LLC		LIBOR Plus 5.75%		(8)			—			(2)			10			—			402			402			—
		11% Secured Debt		(8)			—			(32)			608			8,339			3,532			11,871			—
		Preferred Equity		(8)			—			—			—			400			—			400			—
		Member Units		(8)			6,007			(2,167)			394			7,440			—			7,440			—
		9.5% Secured Debt		(8)			—			(4)			24			432			4			436			—
		Member Units		(8)			(139)			(5)			74			630			—			630			—
Market Force Information, LLC		LIBOR Plus 7.00% (Floor 1.00%)		(9)			—			—			72			200			2,765			200			2,765
		LIBOR Plus 11.00% (Floor 1.00%)		(9)			—			—			2,365			22,624			30			—			22,654
		Member Units		(9)			—			(6,050)			—			13,100			—			6,050			7,050
MH Corbin Holding LLC		5% Current / 5% PIK Secured Debt		(5)			—			470			1,213			11,733			1,444			4,400			8,777
		Preferred Member Units		(5)			—			(980)			—			1,000			—			980			20
		Preferred Member Units		(5)			—			370			—			—			4,770			—			4,770
Mid-Columbia Lumber Products, LLC		10% Secured Debt		(9)			—			—			135			1,746			3			—			1,749
		12% Secured Debt		(9)			—			—			369			3,880			13			—			3,893
		Member Units		(9)			—			(3,568)			5			3,860			238			3,568			530
		9.5% Secured Debt		(9)			—			—			52			746			—			34			712
		Member Units		(9)			—			170			53			1,470			170			—			1,640

Table of Contents


	****		****		****			****			****	Amount of		****			****			****			****
												Interest,
												Fees or
						Amount of			Amount of			Dividends			December 31,									September 30,
						Realized			Unrealized			Credited to			2018			Gross			Gross			2019
Company		Investment(1)(10)(11)		Geography		Gain/(Loss)			Gain/(Loss)			Income(2)			Fair Value			Additions(3)			Reductions(4)			Fair Value
MSC Adviser I, LLC		Member Units		(8)			—			4,580			3,872			65,748			4,580			—			70,328
Mystic Logistics Holdings, LLC		12% Secured Debt		(6)			—			—			681			7,506			30			1,136			6,400
		Common Stock		(6)			—			4,600			124			210			4,600			—			4,810
PPL RVs, Inc.		LIBOR Plus 7.00% (Floor 0.50%)		(8)			—			(94)			1,094			15,100			28			1,349			13,779
		Common Stock		(8)			—			(1,500)			—			10,380			—			1,500			8,880
Principle Environmental, LLC (d/b/a TruHorizon Environmental Solutions)		13% Secured Debt		(8)			—			(48)			709			7,477			48			1,129			6,396
		Preferred Member Units		(8)			—			(350)			1,878			13,090			—			350			12,740
		Warrants		(8)			—			230			—			780			230			—			1,010
Quality Lease Service, LLC		Zero Coupon Secured Debt		(7)			(741)			891			—			6,450			891			7,341			—
		Member Units		(7)			—			—			—			3,809			6,771			—			10,580
The MPI Group, LLC		9% Secured Debt		(7)			—			154			200			2,582			154			—			2,736
		Series A Preferred Units		(7)			(8)			(430)			—			440			8			438			10
		Warrants		(7)			—			—			—			—			—			—			—
		Member Units		(7)			—			—			98			2,479			1			—			2,480
Trantech Radiator Topco, LLC		12% Secured Debt		(7)			—			—			680			—			10,294			800			9,494
		Common Stock		(7)			—			—			39			—			4,655			—			4,655
Vision Interests, Inc.		13% Secured Debt		(9)			—			—			204			2,153			—			125			2,028
		Series A Preferred Stock		(9)			—			350			—			3,740			350			—			4,090
		Common Stock		(9)			—			129			—			280			129			—			409
Ziegler’s NYPD, LLC		6.5% Secured Debt		(8)			—			(2)			51			1,000			2			2			1,000
		12% Secured Debt		(8)			—			—			46			425			200			—			625
		14% Secured Debt		(8)			—			—			292			2,750			—			—			2,750
		Warrants		(8)			—			—			—			—			—			—			—
		Preferred Member Units		(8)			—			161			—			1,249			161			—			1,410
Other controlled investments
Access Media Holdings, LLC		10% PIK Secured Debt		(5)			—			(955)			38			8,558			—			955			7,603
		Preferred Member Units		(5)			—			—			—			(284)			—			—			(284)
		Member Units		(5)			—			—			—			—			—			—			—
ASC Interests, LLC		11% Secured Debt		(8)			—			—			150			1,622			13			—			1,635
		Member Units		(8)			—			(80)			—			1,370			—			80			1,290
ATS Workholding, LLC		5% Secured Debt		(9)			—			(26)			270			4,390			194			93			4,491
		Preferred Member Units		(9)			—			(1,891)			—			3,726			—			1,891			1,835
Bond-Coat, Inc.		15% Secured Debt		(8)			—			(229)			1,343			11,596			78			229			11,445
		Common Stock		(8)			—			(1,070)			—			9,370			—			1,070			8,300
Brewer Crane Holdings, LLC		LIBOR Plus 10.00% (Floor 1.00%)		(9)			—			—			889			9,467			13			372			9,108
		Preferred Member Units		(9)			—			—			90			4,280			—			—			4,280
Bridge Capital Solutions Corporation		13% Secured Debt		(6)			—			—			1,043			6,221			303			—			6,524
		Warrants		(6)			—			(470)			—			4,020			—			470			3,550
		13% Secured Debt		(6)			—			(6)			100			1,000			2			6			996
		Preferred Member Units		(6)			—			—			75			1,000			—			—			1,000
CBT Nuggets, LLC		Member Units		(9)			—			(4,140)			300			61,610			—			4,140			57,470
Centre Technologies Holdings, LLC		LIBOR Plus 9.00% (Floor 2.00%)		(8)			—			—			1,222			—			12,131			—			12,131
		Preferred Member Units		(8)			—			—			90			—			5,840			—			5,840
Chamberlin Holding LLC		LIBOR Plus 10.00% (Floor 1.00%)		(8)			—			140			1,898			20,028			174			1,327			18,875
		Member Units		(8)			—			4,650			1,449			18,940			4,650			—			23,590
		Member Units		(8)			—			—			28			732			315			—			1,047
Charps, LLC		11.50% Secured Debt		(5)			—			(83)			675			11,888			1,695			13,583			—
		15% Secured Debt		(5)			—			—			98			—			2,000			—			2,000
		Preferred Member Units		(5)			—			3,200			461			2,270			3,200			—			5,470
Copper Trail Fund Investments		LP Interests (CTMH, LP)		(9)			—			—			5			872			—			—			872
Datacom, LLC		8% Secured Debt		(8)			—			(137)			—			1,690			—			136			1,554
		10.50% PIK Secured Debt		(8)			—			278			—			9,786			278			—			10,064
		Class A Preferred Member Units		(8)			—			—			—			—			—			—			—
		Class B Preferred Member Units		(8)			—			—			—			—			—			—			—

Table of Contents


	****		****		****			****			****	Amount of		****			****			****			****
												Interest,
												Fees or
						Amount of			Amount of			Dividends			December 31,									September 30,
						Realized			Unrealized			Credited to			2018			Gross			Gross			2019
Company		Investment(1)(10)(11)		Geography		Gain/(Loss)			Gain/(Loss)			Income(2)			Fair Value			Additions(3)			Reductions(4)			Fair Value
Digital Products Holdings LLC		LIBOR Plus 10.00% (Floor 1.00%)		(5)			—			(433)			2,335			25,511			76			6,223			19,364
		Preferred Member Units		(5)			—			(1,831)			150			8,466			1,035			1,831			7,670
Garreco, LLC		LIBOR Plus 8.00% (Floor 1.00%, Ceiling 1.50%)		(8)			—			—			358			5,099			15			603			4,511
		Member Units		(8)			—			(90)			28			2,590			—			90			2,500
Gulf Manufacturing, LLC		Member Units		(8)			—			(1,940)			671			11,690			—			1,940			9,750
Gulf Publishing Holdings, LLC		LIBOR Plus 9.50% (Floor 1.00%)		(8)			—			—			16			—			320			—			320
		12.5% Secured Debt		(8)			—			—			1,212			12,594			21			130			12,485
		Member Units		(8)			—			(270)			—			4,120			—			270			3,850
Harris Preston Fund Investments		LP Interests (2717 MH, L.P.)		(8)			—			191			—			1,133			1,386			500			2,019
Harrison Hydra-Gen, Ltd.		Common Stock		(8)			—			100			247			8,070			100			—			8,170
KBK Industries, LLC		Member Units		(5)			—			4,710			1,344			8,610			4,710			—			13,320
NAPCO Precast, LLC		LIBOR Plus 8.50%		(8)			—			(11)			123			11,475			11			11,486			—
		Member Units		(8)			—			1,590			2,657			13,990			1,590			—			15,580
NexRev LLC		11% Secured Debt		(8)			—			—			1,462			17,288			26			436			16,878
		Preferred Member Units		(8)			—			(1,010)			175			7,890			—			1,010			6,880
NRI Clinical Research, LLC		LIBOR Plus 6.50% (Floor 1.50%)		(9)			—			—			10			—			200			200			—
		14% Secured Debt		(9)			—			(27)			733			6,685			27			202			6,510
		Warrants		(9)			—			390			—			660			390			—			1,050
		Member Units		(9)			—			1,740			32			2,478			1,740			—			4,218
NRP Jones, LLC		12% Secured Debt		(5)			—			—			580			6,376			—			—			6,376
		Member Units		(5)			—			(440)			173			5,960			—			440			5,520
NuStep, LLC		12% Secured Debt		(5)			—			—			1,908			20,458			30			—			20,488
		Preferred Member Units		(5)			—			—			—			10,200			—			—			10,200
OMi Holdings, Inc.		Common Stock		(8)			—			930			1,440			16,020			930			—			16,950
Pegasus Research Group, LLC		Member Units		(8)			—			(490)			—			7,680			—			490			7,190
River Aggregates, LLC		Zero Coupon Secured Debt		(8)			—			—			—			722			—			1			721
		Member Units		(8)			—			—			—			4,610			—			—			4,610
		Member Units		(8)			—			110			—			2,930			110			—			3,040
Tedder Industries, LLC		12%, Secured Debt		(9)			—			—			51			480			720			1,040			160
		12%, Secured Debt		(9)			—			—			1,511			16,246			19			—			16,265
		Preferred Member Units		(9)			—			—			—			7,476			660			—			8,136
Amounts related to investments transferred to or from other 1940 Act classification during the period							(187)			260			(133)			5,809			—			—			—
Total Control investments						$	4,926		$	6,286		$	70,480		$	1,004,993		$	155,211		$	129,829		$	1,024,566
Affiliate Investments
AFG Capital Group, LLC		Warrants		(8)		$	781		$	(691)		$	—		$	950		$	—		$	950		$	—
		10% Secured Debt		(8)			—			—			43			—			1,040			116			924
		Preferred Member Units		(8)			—			1,060			(40)			3,980			1,060			—			5,040
American Trailer Rental Group LLC		LIBOR Plus 7.25% (Floor 1.00%)		(5)			—			199			1,990			20,312			8,728			1,852			27,188
		Member Units		(5)			—			2,600			—			5,780			2,600			—			8,380
BBB Tank Services, LLC		LIBOR Plus 11% (Floor 1.00%)		(8)			—			—			507			3,833			848			—			4,681
		Preferred Member Units		(8)			—			—			14			113			14			—			127
		Member Units		(8)			—			(110)			—			230			—			110			120
Boccella Precast Products LLC		LIBOR Plus 12% (Floor 1.00%)		(6)			—			(63)			1,696			15,724			463			2,943			13,244
		Member Units		(6)			—			724			215			5,080			820			—			5,900
Boss Industries, LLC		Preferred Member Units		(5)			3,771			(3,930)			611			6,176			—			6,176			—
Buca C, LLC		LIBOR Plus 9.25% (Floor 1.00%)		(7)			—			(187)			1,711			19,038			32			287			18,783
		Preferred Member Units		(7)			—			—			200			4,431			200			—			4,631
CAI Software LLC		12% Secured Debt		(6)			—			(30)			969			10,880			30			1,750			9,160
		Member Units		(6)			—			2,223			20			2,717			2,223			—			4,940
Chandler Signs Holdings, LLC		12% Secured Debt		(8)			—			(6)			444			4,546			29			6			4,569
		Class A Units		(8)			—			10			16			2,120			10			—			2,130
Charlotte Russe, Inc		8.50% Secured Debt		(9)			(7,012)			4,003			—			3,930			4,003			7,933			—
		Common Stock		(9)			—			—			—			—			—			—			—
Condit Exhibits, LLC		Member Units		(9)			1,850			(1,850)			132			1,950			—			1,950			—
Congruent Credit Opportunities Funds		LP Interests (Fund II)		(8)			—			—			—			855			—			—			855
		LP Interests (Fund III)		(8)			—			81			949			17,468			81			931			16,618

Table of Contents


	****		****		****			****			****	Amount of		****			****			****			****
												Interest,
												Fees or
						Amount of			Amount of			Dividends			December 31,									September 30,
						Realized			Unrealized			Credited to			2018			Gross			Gross			2019
Company		Investment(1)(10)(11)		Geography		Gain/(Loss)			Gain/(Loss)			Income(2)			Fair Value			Additions(3)			Reductions(4)			Fair Value
Copper Trail Fund Investments		LP Interests (Copper Trail Energy Fund I, LP)		(9)			—			14			11			4,170			14			1,911			2,273
Dos Rios Partners		LP Interests (Dos Rios Partners, LP)		(8)			—			(217)			—			7,153			—			217			6,936
		LP Interests (Dos Rios Partners - A, LP)		(8)			—			(69)			—			2,271			—			69			2,202
East Teak Fine Hardwoods, Inc.		Common Stock		(7)			—			(80)			12			560			—			80			480
EIG Fund Investments		LP Interests (EIG Global Private Debt fund-A, L.P.)		(8)			8			—			84			505			253			57			701
Freeport Financial Funds		LP Interests (Freeport Financial SBIC Fund LP)		(5)			—			506			—			5,399			506			—			5,905
		LP Interests (Freeport First Lien Loan Fund III LP)		(5)			—			(85)			809			10,980			799			1,484			10,295
Fuse, LLC		12% Secured Debt		(9)			—			—			59			—			1,939			—			1,939
		Common Stock		(9)			—			—			—			—			256			—			256
Harris Preston Fund Investments		LP Interests (HPEP 3, L.P.)		(8)			—			—			—			1,733			741			—			2,474
Hawk Ridge Systems, LLC		LIBOR Plus 6.00% (Floor 1.00%)		(9)			—			—			13			—			600			—			600
		10.0% Secured Debt		(9)			—			(27)			1,076			14,300			27			927			13,400
		Preferred Member Units		(9)			—			640			262			7,260			640			—			7,900
		Preferred Member Units		(9)			—			40			—			380			40			—			420
Houston Plating and Coatings, LLC		8% Unsecured Convertible Debt		(8)			—			540			182			3,720			540			—			4,260
		Member Units		(8)			—			2,010			400			8,330			2,010			—			10,340
I-45 SLF LLC		Member Units		(8)			—			(953)			2,515			15,627			800			953			15,474
L.F. Manufacturing Holdings, LLC		Preferred Member Units		(8)			—			—			8			—			78			—			78
		Member Units		(8)			—			(10)			—			2,060			—			10			2,050
OnAsset Intelligence, Inc.		12% PIK Secured Debt		(8)			—			—			537			5,743			539			—			6,282
		10% PIK Secured Debt		(8)			—			—			4			53			4			—			57
		Preferred Stock		(8)			—			—			—			—			—			—			—
		Warrants		(8)			—			—			—			—			—			—			—
PCI Holding Company, Inc.		12% Current Secured Debt		(9)			—			—			1,140			11,908			98			650			11,356
		Preferred Stock		(9)			—			1,210			—			340			1,210			—			1,550
		Preferred Stock		(9)			—			870			—			3,480			870			—			4,350
Rocaceia, LLC (Quality Lease and Rental Holdings, LLC)		12% Secured Debt		(8)			—			—			—			250			—			—			250
		Preferred Member Units		(8)			—			—			—			—			—			—			—
Salado Stone Holdings, LLC		Class A Preferred Units		(8)			—			(310)			—			1,040			—			310			730
SI East, LLC		10.25% Current, Secured Debt		(7)			—			293			2,800			34,885			365			2,287			32,963
		Preferred Member Units		(7)			—			1,340			273			6,000			1,340			—			7,340
Slick Innovations, LLC		14% Current, Secured Debt		(6)			—			—			760			6,959			66			1,280			5,745
		Warrants		(6)			—			109			—			181			109			—			290
		Member Units		(6)			—			380			—			700			380			—			1,080
UniTek Global Services, Inc.		LIBOR Plus 6.50% (Floor 1.00%)		(6)			—			22			194			2,969			22			23			2,968
		Preferred Stock		(6)			—			(3,550)			512			7,413			511			3,550			4,374
		Preferred Stock		(6)			—			398			247			1,637			645			—			2,282
		Preferred Stock		(6)			—			1,118			14			—			1,889			—			1,889
		Preferred Stock		(6)			—			—			459			3,038			459			—			3,497
		Common Stock		(6)			—			(1,420)			—			1,420			—			1,420			—
Universal Wellhead Services Holdings, LLC		Preferred Member Units		(8)			—			(60)			195			950			195			60			1,085
		Member Units		(8)			—			(1,340)			—			2,330			—			1,340			990
Volusion, LLC		11.5% Secured Debt		(8)			—			(418)			2,330			18,407			1,546			418			19,535
		8% Unsecured Convertible Debt		(8)			—			(118)			23			297			112			118			291
		Preferred Member Units		(8)			—			—			—			14,000			—			—			14,000
		Warrants		(8)			—			(1,320)			—			1,890			—			1,320			570
Other
Amounts related to investments transferred to or from other1940 Act classification during the period							—			(415)			1,030			19,439			—			—			—
Total Affiliate investments						$	(602)		$	3,131		$	25,426		$	359,890		$	41,784		$	43,488		$	338,747

(1)	The principal amount, the ownership detail for equity investments and if the investment is income producing is included in the consolidated schedule of investments.
(2)	Represents the total amount of interest, fees and dividends credited to income for the portion of the period for which an investment was included in Control or Affiliate categories, respectively. For investments transferred between Control and Affiliate categories during the period, any income or investment balances related to the time period it
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was in the category other than the one shown at period end is included in “Amounts from investments transferred from other 1940 Act classifications during the period.”
(3)	Gross additions include increases in the cost basis of investments resulting from new portfolio investments, follow-on investments and accrued PIK interest, and the exchange of one or more existing securities for one or more new securities. Gross additions also include net increases in unrealized appreciation or net decreases in net unrealized depreciation as well as the movement of an existing portfolio company into this category and out of a different category.
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(4)	Gross reductions include decreases in the cost basis of investments resulting from principal repayments or sales and the exchange of one or more existing securities for one or more new securities. Gross reductions also include net increases in net unrealized depreciation or net decreases in unrealized appreciation as well as the movement of an existing portfolio company out of this category and into a different category.
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(5)	Portfolio company located in the Midwest region as determined by location of the corporate headquarters. The fair value as of September 30, 2019 for control investments located in this region was $243,750. This represented 15.9% of net assets as of September 30, 2019. The fair value as of September 30, 2019 for affiliate investments located in this region was $51,768. This represented 3.4% of net assets as of September 30, 2019.
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(6)	Portfolio company located in the Northeast region as determined by location of the corporate headquarters. The fair value as of September 30, 2019 for control investments located in this region was $23,280. This represented 1.5% of net assets as of September 30, 2019. The fair value as of September 30, 2019 for affiliate investments located in this region was $55,369. This represented 3.6% of net assets as of September 30, 2019.
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(7)	Portfolio company located in the Southeast region as determined by location of the corporate headquarters. The fair value as of September 30, 2019 for control investments located in this region was $29,955. This represented 2.0% of net assets as of September 30, 2019. The fair value as of September 30, 2019 for affiliate investments located in this region was $64,197. This represented 4.2% of net assets as of September 30, 2019.
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(8)	Portfolio company located in the Southwest region as determined by location of the corporate headquarters. The fair value as of September 30, 2019 for control investments located in this region was $413,244. This represented 27.0% of net assets as of September 30, 2019. The fair value as of September 30, 2019 for affiliate investments located in this region was $123,369. This represented 8.1% of net assets as of September 30, 2019.
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(9)	Portfolio company located in the West region as determined by location of the corporate headquarters. The fair value as of September 30, 2019 for control investments located in this region was $314,337. This represented 20.5% of net assets as of September 30, 2019. The fair value as of September 30, 2019 for affiliate investments located in this region was $44,044. This represented 2.9% of net assets as of September 30, 2019.
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(10)	All of the Company’s portfolio investments are generally subject to restrictions on resale as “restricted securities,” unless otherwise noted.
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(11)	This schedule should be read in conjunction with the consolidated schedule of investments and notes to the consolidated financial statements. Supplemental information can be located within the schedule of investments including end of period interest rate, preferred dividend rate, maturity date, investments not paid currently in cash and investments whose value was determined using significant unobservable inputs.
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(12)	Investment has an unfunded commitment as of September 30, 2019 (see Note K). The fair value of the investment includes the impact of the fair value of any unfunded commitments.
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Table of Contents Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This Quarterly Report on Form 10-Q contains forward-looking statements regarding the plans and objectives of management for future operations and which relate to future events or our future performance or financial condition. Any such forward-looking statements may involve known and unknown risks, uncertainties and other factors which may cause our actual results, performance or achievements to be materially different from future results, performance or achievements expressed or implied by any forward-looking statements. Forward-looking statements, which involve assumptions and describe our future plans, strategies and expectations, are generally identifiable by use of the words “may,” “will,” “should,” “expect,” “anticipate,” “estimate,” “believe,” “intend” or “project” or the negative of these words or other variations on these words or comparable terminology. These forward-looking statements are based on assumptions that may be incorrect, and we cannot assure you that the projections included in these forward-looking statements will come to pass. Our actual results could differ materially from those expressed or implied by the forward-looking statements as a result of various factors, including, without limitation: changes in laws and regulations and adverse changes in the economy generally or in the industries in which our portfolio companies operate, including with respect to changes from the impact of the COVID-19 pandemic, and the resulting impacts on our and our portfolio companies’ business and operations, liquidity and access to capital; and such other factors referenced in Item 1A entitled “Risk Factors” below in Part 2 of this Quarterly Report on Form 10-Q, if any, and discussed in Item 1A entitled “Risk Factors” in Part 2 of each of our Quarterly Reports on Form 10-Q for the quarters ended March 31, 2020 and June 30, 2020, filed with the Securities and Exchange Commission (the “SEC”) on May 8, 2020 and August 7, 2020, respectively, and in Item 1A entitled “Risk Factors” in Part I of our Annual Report on Form 10-K for the year ended December 31, 2019, filed with the SEC on February 28, 2020 and elsewhere in this Quarterly Report on Form 10-Q and our other SEC filings.

We have based the forward-looking statements included in this Quarterly Report on Form 10-Q on information available to us on the date of this Quarterly Report on Form 10-Q, and we assume no obligation to update any such forward-looking statements, unless we are required to do so by applicable law. However, you are advised to refer to any additional disclosures that we may make directly to you or through reports that we in the future may file with the SEC, including subsequent periodic and current reports.

ORGANIZATION

Table of Contents its investment management activities for External Parties, it is accounted for as a portfolio investment of MSCC and is not included as a consolidated subsidiary of MSCC in MSCC’s consolidated financial statements.

COVID-19 UPDATE

The COVID-19 pandemic, and the related effect on the U.S. and global economies, has had, and threatens to continue to have, adverse consequences for our business and operating results, and the businesses and operating results of our portfolio companies. During the quarter ended September 30, 2020, we continued to work collectively with our employees and portfolio companies to navigate the significant challenges created by the COVID-19 pandemic. We remain focused on ensuring the safety of our employees and the employees of our portfolio companies, while also managing our ongoing business activities. In this regard, we remain heavily engaged with our portfolio companies. As discussed below under “Discussion and Analysis of Results of Operations,” our investment income, principally our interest and dividend income, has been negatively impacted by the economic effects of COVID-19 through the first nine months of 2020. In addition, our net asset value as of September 30, 2020 decreased as compared to our net asset value as of December 31, 2019, primarily due to the unrealized depreciation of our Investment Portfolio caused by the immediate adverse economic effects of the COVID-19 pandemic and uncertainty regarding the extent and duration of its impact, as well as the negative impact of the pandemic on our net investment income and net realized losses in 2020. We continue to maintain access to multiple sources of liquidity, including cash, unused capacity under our Credit Facility and remaining SBIC debenture capacity, and from December 31, 2019 to September 30, 2020, our total liquidity improved from $495.5 million to $559.3 million. As of September 30, 2020, we were in compliance with all debt covenants and do not anticipate any issues with our ability to comply with all covenants in the future. Refer to “—Liquidity and Capital Resources” below for further discussion as of September 30, 2020.

Neither our management nor our Board of Directors is able to predict the full impact of the COVID-19 pandemic, including its duration and the magnitude of its economic and societal impact. As such, while we will continue to monitor the rapidly evolving situation and guidance from U.S. and international authorities, including federal, state and local public health authorities, we are unable to predict with any certainty the extent to which the outbreak will negatively affect our portfolio companies’ operating results and financial condition or the impact that such disruptions may have on our results of operations and financial condition in the future.

OVERVIEW

Our principal investment objective is to maximize our portfolio’s total return by generating current income from our debt investments and capital appreciation from our equity and equity-related investments, including warrants, convertible securities and other rights to acquire equity securities in a portfolio company. Our LMM companies generally have annual revenues between $10 million and $150 million, and our LMM portfolio investments generally range in size from $5 million to $50 million. Our Middle Market investments are made in businesses that are generally larger in size than our LMM portfolio companies, with annual revenues typically between $150 million and $1.5 billion, and our Middle Market investments generally range in size from $3 million to $20 million. Our private loan (“Private Loan”) portfolio investments are primarily debt securities in privately held companies that have been originated through strategic relationships with other investment funds on a collaborative basis. Private Loan investments are typically similar in size, structure, terms and conditions to investments we hold in our LMM portfolio and Middle Market portfolio. 96

Table of Contents We seek to fill the financing gap for LMM businesses, which, historically, have had limited access to financing from commercial banks and other traditional sources. The underserved nature of the LMM creates the opportunity for us to meet the financing needs of LMM companies while also negotiating favorable transaction terms and equity participations. Our ability to invest across a company’s capital structure, from secured loans to equity securities, allows us to offer portfolio companies a comprehensive suite of financing options, or a “one stop” financing solution. Providing customized, “one stop” financing solutions is important to LMM portfolio companies. We generally seek to partner directly with entrepreneurs, management teams and business owners in making our investments. Our LMM portfolio debt investments are generally secured by a first lien on the assets of the portfolio company and typically have a term of between five and seven years from the original investment date.

Our Middle Market portfolio investments primarily consist of direct investments in or secondary purchases of interest-bearing debt securities in privately held companies based in the United States that are generally larger in size than the companies included in our LMM portfolio. Our Middle Market portfolio companies generally have annual revenues between $150 million and $1.5 billion, and our Middle Market investments generally range in size from $3 million to $20 million. Our Middle Market portfolio debt investments are generally secured by either a first or second priority lien on the assets of the portfolio company and typically have an expected duration of between three and seven years from the original investment date.

Our Private Loan portfolio investments are primarily debt securities in privately held companies that have been originated through strategic relationships with other investment funds on a collaborative basis and are often referred to in the debt markets as “club deals.” Private Loan investments are typically similar in size, structure, terms and conditions to investments we hold in our LMM portfolio and Middle Market portfolio. Our Private Loan portfolio debt investments are generally secured by either a first or second priority lien on the assets of the portfolio company and typically have a term of between three and seven years from the original investment date.

Our other portfolio (“Other Portfolio”) investments primarily consist of investments that are not consistent with the typical profiles for our LMM, Middle Market or Private Loan portfolio investments, including investments which may be managed by third parties. In our Other Portfolio, we may incur indirect fees and expenses in connection with investments managed by third parties, such as investments in other investment companies or private funds.

The following tables provide a summary of our investments in the LMM, Middle Market and Private Loan portfolios as of September 30, 2020 and December 31, 2019 (this information excludes the Other Portfolio investments and the External Investment Manager which are discussed further below):


	****	As of September 30, 2020
	****	LMM(a)		****	Middle Market		****	Private Loan
		(dollars in millions)
Number of portfolio companies			70			42			68
Fair value		$	1,228.1		$	441.3		$	743.7
Cost		$	1,063.6		$	515.5		$	823.0
% of portfolio at cost - debt			66.2	%		94.4	%		93.8	%
% of portfolio at cost - equity			33.8	%		5.6	%		6.2	%
% of debt investments at cost secured by first priority lien			97.1	%		92.3	%		95.8	%
Weighted-average annual effective yield (b)			11.6	%		7.9	%		8.6	%
Average EBITDA (c)		$	5.0		$	110.5		$	54.2

(a)	At September 30, 2020, we had equity ownership in approximately 99% of our LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was approximately 41%.

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(b)

The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of September 30, 2020, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. Weighted-average annual effective yield is higher than what an investor in shares of our common stock will realize on its investment because it does not reflect our expenses or any sales load paid by an investor.

(c)

The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Middle Market and Private Loan portfolios. These calculations exclude certain portfolio companies, including two LMM portfolio companies, one Middle Market portfolio company and four Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for our investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate.

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	****	As of December 31, 2019
		LMM(a)			Middle Market			Private Loan
		(dollars in millions)
Number of portfolio companies			69			51			65
Fair value		$	1,206.9		$	522.1		$	692.1
Cost		$	1,002.2		$	572.3		$	734.8
% of portfolio at cost - debt			65.9	%		94.8	%		94.6	%
% of portfolio at cost - equity			34.1	%		5.2	%		5.4	%
% of debt investments at cost secured by first priority lien			98.1	%		91.3	%		95.4	%
Weighted-average annual effective yield (b)			11.8	%		8.6	%		9.5	%
Average EBITDA (c)		$	5.1		$	85.0		$	57.8

(a)	At December 31, 2019, we had equity ownership in approximately 99% of our LMM portfolio companies, and the average fully diluted equity ownership in those portfolio companies was approximately 42%.
(b)	The weighted-average annual effective yields were computed using the effective interest rates for all debt investments at cost as of December 31, 2019, including amortization of deferred debt origination fees and accretion of original issue discount but excluding fees payable upon repayment of the debt instruments and any debt investments on non-accrual status. Weighted-average annual effective yield is higher than what an investor in shares of our common stock will realize on its investment because it does not reflect our expenses or any sales load paid by an investor.
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(c)	The average EBITDA is calculated using a simple average for the LMM portfolio and a weighted-average for the Middle Market and Private Loan portfolios. These calculations exclude certain portfolio companies, including three LMM portfolio companies, two Middle Market portfolio companies and three Private Loan portfolio companies, as EBITDA is not a meaningful valuation metric for our investments in these portfolio companies, and those portfolio companies whose primary purpose is to own real estate.
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As of September 30, 2020, we had Other Portfolio investments in twelve companies, collectively totaling approximately $100.5 million in fair value and approximately $126.2 million in cost basis and which comprised approximately 3.9% of our Investment Portfolio (as defined in “Critical Accounting Policies—Basis of Presentation” below) at fair value. As of December 31, 2019, we had Other Portfolio investments in eleven companies, collectively totaling approximately $106.7 million in fair value and approximately $118.4 million in cost basis and which comprised approximately 4.1% of our Investment Portfolio at fair value.

As previously discussed, the External Investment Manager is a wholly owned subsidiary that is treated as a portfolio investment. As of September 30, 2020, there was no cost basis in this investment and the investment had a fair value of approximately $71.1 million, which comprised approximately 2.8% of our Investment Portfolio at fair value. As of December 31, 2019, there was no cost basis in this investment and the investment had a fair value of approximately $74.5 million, which comprised approximately 2.9% of our Investment Portfolio at fair value.

Our portfolio investments are generally made through MSCC and the Funds. MSCC and the Funds share the same investment strategies and criteria, although they are subject to different regulatory regimes. An investor’s return in MSCC will depend, in part, on the Funds’ investment returns as they are wholly owned subsidiaries of MSCC. 98

Table of Contents The level of new portfolio investment activity will fluctuate from period to period based upon our view of the current economic fundamentals, our ability to identify new investment opportunities that meet our investment criteria, and our ability to consummate the identified opportunities. The level of new investment activity, and associated interest and fee income, will directly impact future investment income. In addition, the level of dividends paid by portfolio companies and the portion of our portfolio debt investments on non-accrual status will directly impact future investment income. While we intend to grow our portfolio and our investment income over the long term, our growth and our operating results may be more limited during depressed economic periods. However, we intend to appropriately manage our cost structure and liquidity position based on applicable economic conditions and our investment outlook. The level of realized gains or losses and unrealized appreciation or depreciation on our investments will also fluctuate depending upon portfolio activity, economic conditions and the performance of our individual portfolio companies. The changes in realized gains and losses and unrealized appreciation or depreciation could have a material impact on our operating results.

Because we are internally managed, we do not pay any external investment advisory fees, but instead directly incur the operating costs associated with employing investment and portfolio management professionals. We believe that our internally managed structure provides us with a beneficial operating expense structure when compared to other publicly traded and privately held investment firms which are externally managed, and our internally managed structure allows us the opportunity to leverage our non-interest operating expenses as we grow our Investment Portfolio. The ratio of our total operating expenses, excluding interest expense, as a percentage of our quarterly average total assets was 1.3% for each of the trailing twelve months ended September 30, 2020 and 2019, and 1.4% for the year ended December 31, 2019.

During May 2012, we entered into an investment sub-advisory agreement with HMS Adviser, LP (“HMS Adviser”), which is the investment advisor to HMS Income, a non-listed BDC, to provide certain investment advisory services to HMS Adviser. In December 2013, after obtaining required no-action relief from the SEC to allow us to own a registered investment adviser, we assigned the sub-advisory agreement to the External Investment Manager since the fees received from such arrangement could otherwise have negative consequences on our ability to meet the source-of-income requirement necessary for us to maintain our RIC tax treatment. Under the investment sub-advisory agreement, the External Investment Manager is entitled to 50% of the base management fee and the incentive fees earned by HMS Adviser under its advisory agreement with HMS Income. During the three months ended September 30, 2020 and 2019, the External Investment Manager earned $2.3 million and $2.7 million, respectively, in base management fee income. No incentive fee income was earned in the three months ended September 30, 2020, compared to $0.2 million earned in the three months ended September 30, 2019. During the nine months ended September 30, 2020, the External Investment Manager earned $7.2 million in base management fee income and no incentive fees compared to $8.4 million of base management fees and $1.6 million in incentive fees for the comparable period in 2019 under the sub-advisory agreement with HMS Adviser.

During April 2014, we received an exemptive order from the SEC permitting co-investments by us and HMS Income in certain negotiated transactions where co-investing would otherwise be prohibited under the 1940 Act. We have made, and in the future intend to continue to make, such co-investments with HMS Income in accordance with the conditions of the order. The order requires, among other things, that we and the External Investment Manager consider whether each such investment opportunity is appropriate for HMS Income and, if it is appropriate, to propose an allocation of the investment opportunity between us and HMS Income. Because the External Investment Manager may receive performance-based fee compensation from HMS Income, this may provide it an incentive to allocate opportunities to HMS Income instead of us. However, both we and the External Investment Manager have policies and procedures in place to manage this conflict. We have filed a new application for co-investment exemptive relief with the SEC that would provide greater flexibility in structuring and effectuating co-investment transactions between us, HMS Income and certain other funds managed by us as described in the application. Our new application for co-investment exemptive relief has not yet been granted, and there is no assurance that such relief will be granted on the terms and conditions in the application or at all. Pending the receipt of such new co-investment relief, we intend to continue to rely on our current co-investment relief. 99

Table of Contents CRITICAL ACCOUNTING POLICIES

Basis of Presentation

Our consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”). For each of the periods presented herein, our consolidated financial statements include the accounts of MSCC and its consolidated subsidiaries. The Investment Portfolio, as used herein, refers to all of our investments in LMM portfolio companies, investments in Middle Market portfolio companies, Private Loan portfolio investments, Other Portfolio investments, and the investment in the External Investment Manager. Our results of operations for the three and nine months ended September 30, 2020 and 2019, cash flows for the nine months ended September 30, 2020 and 2019, and financial position as of September 30, 2020 and December 31, 2019, are presented on a consolidated basis. The effects of all intercompany transactions between us and our consolidated subsidiaries have been eliminated in consolidation.

Our accompanying unaudited consolidated financial statements are presented in conformity with U.S. GAAP for interim financial information and pursuant to the requirements for reporting on Form 10-Q and Articles 6, 10 and 12 of Regulation S-X. Accordingly, certain disclosures accompanying annual financial statements prepared in accordance with U.S. GAAP are omitted. In the opinion of management, the unaudited consolidated financial results included herein contain all adjustments, consisting solely of normal recurring accruals, considered necessary for the fair presentation of financial statements for the interim periods included herein. The results of operations for the three and nine months ended September 30, 2020 and 2019 are not necessarily indicative of the operating results to be expected for the full year. Also, the unaudited financial statements and notes should be read in conjunction with the audited financial statements and notes thereto for the year ended December 31, 2019. Financial statements prepared on a U.S. GAAP basis require management to make estimates and assumptions that affect the amounts and disclosures reported in the financial statements and accompanying notes. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed herein.

We are an investment company following the accounting and reporting guidance in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 946, Financial Services—Investment Companies (“ASC 946”). Under ASC 946, we are precluded from consolidating other entities in which we have equity investments, including those in which we have a controlling interest, unless the other entity is another investment company. An exception to this general principle in ASC 946 occurs if we hold a controlling interest in an operating company that provides all or substantially all of its services directly to us or to any of our portfolio companies. Accordingly, as noted above, our consolidated financial statements include the financial position and operating results for the Funds and the Taxable Subsidiaries. We have determined that none of our portfolio investments qualify for this exception, including the investment in the External Investment Manager. Therefore, our Investment Portfolio is carried on the consolidated balance sheet at fair value with any adjustments to fair value recognized as “Net Unrealized Appreciation (Depreciation)” on the consolidated statements of operations until the investment is realized, usually upon exit, resulting in any gain or loss being recognized as a “Net Realized Gain (Loss).”

Investment Portfolio Valuation

The most significant determination inherent in the preparation of our consolidated financial statements is the valuation of our Investment Portfolio and the related amounts of unrealized appreciation and depreciation. As of September 30, 2020 and December 31, 2019, our Investment Portfolio valued at fair value represented approximately 97% and 96% of our total assets, respectively. We are required to report our investments at fair value. We follow the provisions of FASB ASC 820, Fair Value Measurements and Disclosures (“ASC 820”). ASC 820 defines fair value, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value and enhances disclosure requirements for fair value measurements. ASC 820 requires us to assume that the portfolio investment is to be sold in the principal market to independent market participants, which may be a hypothetical market. Market participants are defined as buyers and sellers in the principal market that are independent, knowledgeable and willing and able to transact. See “Note B.1.—Valuation of the Investment Portfolio” in the notes to consolidated financial statements for a detailed discussion of our investment portfolio valuation process and procedures.

Due to the inherent uncertainty in the valuation process, our determination of fair value for our Investment Portfolio may differ materially from the values that would have been determined had a ready market for the securities 100

Table of Contents existed. In addition, changes in the market environment, portfolio company performance and other events that may occur over the lives of the investments may cause the gains or losses ultimately realized on these investments to be materially different than the valuations currently assigned. We determine the fair value of each individual investment and record changes in fair value as unrealized appreciation or depreciation.

Our Board of Directors has the final responsibility for overseeing, reviewing and approving, in good faith, our determination of the fair value for our Investment Portfolio and our valuation procedures, consistent with 1940 Act requirements. We believe our Investment Portfolio as of September 30, 2020 and December 31, 2019 approximates fair value as of those dates based on the markets in which we operate and other conditions in existence on those reporting dates.

Revenue Recognition

Interest and Dividend Income

We record interest and dividend income on the accrual basis to the extent amounts are expected to be collected. Dividend income is recorded as dividends are declared by the portfolio company or at the point an obligation exists for the portfolio company to make a distribution. In accordance with our valuation policies, we evaluate accrued interest and dividend income periodically for collectability. When a loan or debt security becomes 90 days or more past due, and if we otherwise do not expect the debtor to be able to service all of its debt or other obligations, we will generally place the loan or debt security on non-accrual status and cease recognizing interest income on that loan or debt security until the borrower has demonstrated the ability and intent to pay contractual amounts due. If a loan or debt security’s status significantly improves regarding the debtor’s ability to service the debt or other obligations, or if a loan or debt security is sold or written off, we remove it from non-accrual status.

Fee Income

We may periodically provide services, including structuring and advisory services, to our portfolio companies or other third parties. For services that are separately identifiable and evidence exists to substantiate fair value, fee income is recognized as earned, which is generally when the investment or other applicable transaction closes. Fees received in connection with debt financing transactions for services that do not meet these criteria are treated as debt origination fees and are deferred and accreted into income over the life of the financing.

Payment-in-Kind (“PIK”) Interest and Cumulative Dividends

We hold certain debt and preferred equity instruments in our Investment Portfolio that contain PIK interest and cumulative dividend provisions. The PIK interest, computed at the contractual rate specified in each debt agreement, is periodically added to the principal balance of the debt and is recorded as interest income. Thus, the actual collection of this interest may be deferred until the time of debt principal repayment. Cumulative dividends are recorded as dividend income, and any dividends in arrears are added to the balance of the preferred equity investment. The actual collection of these dividends in arrears may be deferred until such time as the preferred equity is redeemed or sold. To maintain RIC tax treatment (as discussed below), these non-cash sources of income may need to be paid out to stockholders in the form of distributions, even though we may not have collected the PIK interest and cumulative dividends in cash. We stop accruing PIK interest and cumulative dividends and write off any accrued and uncollected interest and dividends in arrears when we determine that such PIK interest and dividends in arrears are no longer collectible. For the three months ended September 30, 2020 and 2019, (i) approximately 3.7% and 1.6%, respectively, of our total investment income was attributable to PIK interest income not paid currently in cash and (ii) approximately 0.7% and 1.0%, respectively, of our total investment income was attributable to cumulative dividend income not paid currently in cash. For the nine months ended September 30, 2020 and 2019, (i) approximately 2.4% and 1.9%, respectively, of our total investment income was attributable to PIK interest income not paid currently in cash and (ii) approximately 0.9% and 1.1%, respectively, of our total investment income was attributable to cumulative dividend income not paid currently in cash.

Share-Based Compensation

We account for our share-based compensation plans using the fair value method, as prescribed by ASC 718, Compensation—Stock Compensation. Accordingly, for restricted stock awards, we measure the grant date fair value 101

Table of Contents based upon the market price of our common stock on the date of the grant and amortize the fair value of the awards as share-based compensation expense over the requisite service period, which is generally the vesting term.

We have also adopted Accounting Standards Update (“ASU”) 2016-09, Compensation—Stock Compensation: Improvements to Employee Share-Based Payment Accounting, which requires that all excess tax benefits and tax deficiencies (including tax benefits of dividends on share-based payment awards) be recognized as income tax expense or benefit in the income statement and not delay recognition of a tax benefit until the tax benefit is realized through a reduction to taxes payable. Accordingly, the tax effects of exercised or vested awards are treated as discrete items in the reporting period in which they occur. Additionally, we have elected to account for forfeitures as they occur.

Income Taxes

MSCC has elected to be treated for U.S. federal income tax purposes as a RIC. MSCC’s taxable income includes the taxable income generated by MSCC and certain of its subsidiaries, including the Funds, which are treated as disregarded entities for tax purposes. As a RIC, MSCC generally will not pay corporate-level U.S. federal income taxes on any net ordinary taxable income or capital gains that MSCC distributes to its stockholders. MSCC must generally distribute at least 90% of its “investment company taxable income” (which is generally its net ordinary taxable income and realized net short-term capital gains in excess of realized net long-term capital losses) and 90% of its tax-exempt income to maintain its RIC status (pass-through tax treatment for amounts distributed). As part of maintaining RIC status, undistributed taxable income (subject to a 4% non-deductible U.S. federal excise tax) pertaining to a given fiscal year may be distributed up to 12 months subsequent to the end of that fiscal year, provided such dividends are declared on or prior to the later of (i) filing of the U.S. federal income tax return for the applicable fiscal year or (ii) the fifteenth day of the ninth month following the close of the year in which such taxable income was generated.

The Taxable Subsidiaries primarily hold certain portfolio investments for us. The Taxable Subsidiaries permit us to hold equity investments in portfolio companies which are “pass-through” entities for tax purposes and to continue to comply with the “source-of-income” requirements contained in the RIC tax provisions of the Code. The Taxable Subsidiaries are consolidated with us for U.S. GAAP financial reporting purposes, and the portfolio investments held by the Taxable Subsidiaries are included in our consolidated financial statements as portfolio investments and recorded at fair value. The Taxable Subsidiaries are not consolidated with MSCC for income tax purposes and may generate income tax expense, or benefit, and tax assets and liabilities, as a result of their ownership of certain portfolio investments. The taxable income, or loss, of the Taxable Subsidiaries may differ from their book income, or loss, due to temporary book and tax timing differences and permanent differences. The Taxable Subsidiaries are each taxed at their normal corporate tax rates based on their taxable income. The income tax expense, or benefit, if any, and the related tax assets and liabilities, of the Taxable Subsidiaries are reflected in our consolidated financial statements.

Table of Contents INVESTMENT PORTFOLIO COMPOSITION

Our LMM portfolio investments primarily consist of secured debt, equity warrants and direct equity investments in privately held, LMM companies based in the United States. Our LMM portfolio companies generally have annual revenues between $10 million and $150 million, and our LMM investments generally range in size from $5 million to $50 million. The LMM debt investments are typically secured by either a first or second priority lien on the assets of the portfolio company, can include either fixed or floating rate terms and generally have a term of between five and seven years from the original investment date. In most LMM portfolio investments, we receive nominally priced equity warrants and/or make direct equity investments in connection with a debt investment.

Our Middle Market portfolio investments primarily consist of direct investments in or secondary purchases of interest-bearing debt securities in privately held companies based in the United States that are generally larger in size than the companies included in our LMM portfolio. Our Middle Market portfolio companies generally have annual revenues between $150 million and $1.5 billion, and our Middle Market investments generally range in size from $3 million to $20 million. Our Middle Market portfolio debt investments are generally secured by either a first or second priority lien on the assets of the portfolio company and typically have a term of between three and seven years from the original investment date.

Our Private Loan portfolio investments are primarily debt securities in privately held companies which have been originated through strategic relationships with other investment funds on a collaborative basis and are often referred to in the debt markets as “club deals.” Private Loan investments are typically similar in size, structure, terms and conditions to investments we hold in our LMM portfolio and Middle Market portfolio. Our Private Loan portfolio debt investments are generally secured by either a first or second priority lien on the assets of the portfolio company and typically have a term of between three and seven years from the original investment date.

Our Other Portfolio investments primarily consist of investments which are not consistent with the typical profiles for LMM, Middle Market and Private Loan portfolio investments, including investments which may be managed by third parties. In the Other Portfolio, we may incur indirect fees and expenses in connection with investments managed by third parties, such as investments in other investment companies or private funds.

Our external asset management business is conducted through the External Investment Manager. The External Investment Manager earns management fees based on the assets of the funds under management and may earn incentive fees, or a carried interest, based on the performance of the funds managed. We have entered into an agreement with the External Investment Manager to share employees in connection with its asset management business generally, and specifically for its relationship with HMS Income. Through this agreement, we share employees with the External Investment Manager, including their related infrastructure, business relationships, management expertise and capital raising capabilities, and we allocate the related expenses to the External Investment Manager pursuant to the sharing agreement. Our total expenses for the three months ended September 30, 2020 and 2019 are net of expenses allocated to the External Investment Manager of $1.9 million and $1.7 million, respectively. Our total expenses for the nine months ended September 30, 2020 and 2019 are net of expenses allocated to the External Investment Manager of $5.3 and $5.0 million, respectively. The External Investment Manager earns management fees based on the assets of the funds under management and may earn incentive fees, or a carried interest, based on the performance of the funds managed. The total contribution of the External Investment Manager to our net investment income consists of the combination of the expenses allocated to the External Investment Manager and the dividend income earned from the External Investment Manager. For the three months ended September 30, 2020 and 2019, the total contribution to our net investment income was $2.2 million and $2.6 million, respectively. For the nine months ended September 30, 2020 and 2019, the total contribution to our net investment income was $6.7 million and $8.9 million, respectively.

The following tables summarize the composition of our total combined LMM portfolio investments, Middle Market portfolio investments and Private Loan portfolio investments at cost and fair value by type of investment as a percentage of the total combined LMM portfolio investments, Middle Market portfolio investments and Private Loan portfolio investments as of September 30, 2020 and December 31, 2019 (this information excludes the Other Portfolio investments and the External Investment Manager).

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Cost:	September 30, 2020		December 31, 2019
First lien debt	77.9	%	78.2	%
Equity	17.8	%	17.2	%
Second lien debt	3.0	%	3.5	%
Equity warrants	0.5	%	0.6	%
Other	0.8	%	0.5	%
	100.0	%	100.0	%


Fair Value:	September 30, 2020		December 31, 2019
First lien debt	71.0	%	70.1	%
Equity	25.1	%	26.0	%
Second lien debt	2.8	%	3.0	%
Equity warrants	0.3	%	0.4	%
Other	0.8	%	0.5	%
	100.0	%	100.0	%

Our LMM portfolio investments, Middle Market portfolio investments and Private Loan portfolio investments carry a number of risks including: (1) investing in companies which may have limited operating histories and financial resources; (2) holding investments that generally are not publicly traded and which may be subject to legal and other restrictions on resale; and (3) other risks common to investing in below investment grade debt and equity investments in our Investment Portfolio. Please see “Risk Factors—Risks Related to Our Investments” contained in our Form 10-K for the fiscal year ended December 31, 2019 and “Risk Factors” below in this Quarterly Report on Form 10-Q and in each of our Quarterly Reports on Form 10-Q for the quarters ended March 31, 2020 and June 30, 2020 for a more complete discussion of the risks involved with investing in our Investment Portfolio.

PORTFOLIO ASSET QUALITY

We utilize an internally developed investment rating system to rate the performance of each LMM portfolio company and to monitor our expected level of returns on each of our LMM investments in relation to our expectations for the portfolio company. The investment rating system takes into consideration various factors, including each investment’s expected level of returns, the collectability of our debt investments and the ability to receive a return of the invested capital in our equity investments, comparisons to competitors and other industry participants, the portfolio company’s future outlook and other factors that are deemed to be significant to the portfolio company.

As of September 30, 2020, our total Investment Portfolio had twelve investments on non-accrual status, which comprised approximately 2.6% of its fair value and 7.1% of its cost. As of December 31, 2019, our total Investment Portfolio had eight investments on non-accrual status, which comprised approximately 1.4% of its fair value and 4.8% of its cost.

The operating results of our portfolio companies are impacted by changes in the broader fundamentals of the United States economy. In periods during which the United States economy contracts, as it has due to the impact of COVID-19, it is likely that the financial results of small to mid-sized companies, like those in which we invest, could experience deterioration or limited growth from current levels, which could ultimately lead to difficulty in meeting their debt service requirements, to an increase in defaults on our debt investments or in realized losses on our investments and to difficulty in maintaining historical dividend payment rates and unrealized appreciation on our equity investments. Consequently, we can provide no assurance that the performance of certain portfolio companies will not be negatively impacted by future economic cycles or other conditions, which could also have a negative impact on our future results. 104

Table of Contents DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS

Comparison of the three months ended September 30, 2020 and September 30, 2019


	Three Months Ended							****
	September 30,				Net Change
	2020		2019		Amount		%
	(dollars in thousands)
Total investment income	$	51,954	$	60,068	$	(8,114)	(14)	%
Total expenses		(21,492)		(21,056)		(436)	2	%
Net investment income		30,462		39,012		(8,550)	(22)	%
Net realized loss from investments		(13,874)		(5,876)		(7,998)	136	%
Net unrealized appreciation (depreciation) from:
Portfolio investments		63,114		(2,927)		66,041	NM
SBIC debentures		—		(319)		319	NM
Total net unrealized appreciation		63,114		(3,246)		66,360	NM
Income tax benefit (provision)		(1,507)		4,012		(5,519)	NM
Net increase in net assets resulting from operations	$	78,195	$	33,902	$	44,293	131	%


	Three Months Ended							****
	September 30,				Net Change
	2020		2019		Amount		%
	(dollars in thousands, except per share amounts)
Net investment income	$	30,462	$	39,012	$	(8,550)	(22)	%
Share‑based compensation expense		2,561		2,572		(11)	NM
Distributable net investment income(a)	$	33,023	$	41,584	$	(8,561)	(21)	%
Net investment income per share—Basic and diluted	$	0.46	$	0.62	$	(0.16)	(26)	%
Distributable net investment income per share—Basic and diluted(a)	$	0.50	$	0.66	$	(0.16)	(24)	%

Not Meaningful

(a)

Distributable net investment income is net investment income as determined in accordance with U.S. GAAP, excluding the impact of share-based compensation expense which is non-cash in nature. We believe presenting distributable net investment income and related per share amounts is useful and appropriate supplemental disclosure of information for analyzing our financial performance since share-based compensation does not require settlement in cash. However, distributable net investment income is a non-U.S. GAAP measure and should not be considered as a replacement to net investment income and other earnings measures presented in accordance with U.S. GAAP. Instead, distributable net investment income should be reviewed only in connection with such U.S. GAAP measures in analyzing our financial performance. A reconciliation of net investment income in accordance with U.S. GAAP to distributable net investment income is presented in the table above.

---

Investment Income

Total investment income for the three months ended September 30, 2020 was $52.0 million, a 14% decrease from the $60.1 million of total investment income for the corresponding period of 2019. This comparable period decrease was principally attributable to (i) a $4.4 million decrease in dividend income from Investment Portfolio equity investments, primarily resulting from the negative impacts of the COVID-19 pandemic and, specifically, on certain of our portfolio companies’ operating results, financial condition and liquidity, as well as the uncertainty relative to the duration of the pandemic’s effects and (ii) a $4.1 million decrease in interest income, which was primarily due to lower floating interest rates on investment portfolio debt investments based upon the decline in the London Interbank Offered Rate (“LIBOR”). These decreases were partially offset by a $0.3 million increase in fee income. The $8.1 million decrease in total investment income in the three months ended September 30, 2020 includes the impact of a $1.3 million decrease from accelerated prepayment, repricing and other income activity considered less consistent or non-recurring. 105

Table of Contents Expenses

Total expenses for the three months ended September 30, 2020 increased to $21.5 million from $21.1 million for the corresponding period of 2019. This increase in operating expenses was principally attributable to (i) a $0.7 million increase in compensation expense and (ii) a $0.4 million increase in general and administrative expense, partially offset by (i) a $0.4 million decrease in interest expense and (ii) a $0.2 million increase in expenses allocated to the External Investment Manager. The increase in compensation expense is primarily related to a $0.4 million increase in expense as a result of the change in the fair value of our deferred compensation plan assets.

Net Investment Income

Net investment income for the three months ended September 30, 2020 decreased 22% to $30.5 million, or $0.46 per share, compared to net investment income of $39.0 million, or $0.62 per share, for the corresponding period of 2019. The decrease in net investment income was principally attributable to the decrease in total investment income, as discussed above. The decline in net investment income per share is primarily attributable to the decrease in total investment income, as well as, the 4.5% increase in weighted average shares outstanding to 66.1 million for the three months ended September 30, 2020, primarily due to shares issued through the ATM Program (as defined in “—Liquidity and Capital Resources—Capital Resources” below), shares issued pursuant to our equity incentive plans and shares issued pursuant to our dividend reinvestment plan. The decline in net investment income per share includes the impacts of (i) a decrease of $0.02 per share due to the decrease in investment income from accelerated prepayment, repricing and other income activity considered non-recurring, as discussed above, and (ii) a decrease of $0.01 per share due to the increase in compensation expense as a result of the increase in the fair value of the deferred compensation plan assets during the third quarter of 2020.

Distributable Net Investment Income

Distributable net investment income for the three months ended September 30, 2020 decreased 21% to $33.0 million, or $0.50 per share, compared with $41.6 million, or $0.66 per share, in the corresponding period of 2019. The decline in distributable net investment income was primarily due to the decreased level of total investment income, as discussed above. The decline in distributable net investment income per share is primarily attributable to the decrease in total investment income, as well as, a greater number of average shares outstanding compared to the corresponding period in 2019, also as described above. The decline in distributable net investment income per share includes the impacts of (i) the decrease in investment income from accelerated prepayment, repricing and other income activity considered non-recurring and (ii) the increase in compensation expense as a result of the increase in the fair value of the deferred compensation plan assets during the third quarter of 2020, as discussed above.

Net Increase in Net Assets Resulting from Operations

The net increase in net assets resulting from operations for the three months ended September 30, 2020 was $78.2 million, or $1.18 per share, compared with $33.9 million, or $0.54 per share, during the three months ended September 30, 2019. This $44.3 million increase from the prior year’s comparable period was primarily the result of a $66.0 million improvement in net unrealized appreciation (depreciation) from portfolio investments, including the impact of accounting reversals relating to realized gains/income (losses), with these increases partially offset by (i) an $8.6 million decrease in net investment income, as discussed above, (ii) an $8.0 million increase in net realized loss from investments and (iii) a $5.5 million increase in income tax provision. The $13.9 million net realized loss on investments for the three months ended September 30, 2020 was primarily the result of (i) a $12.6 million realized loss resulting from the full exit of three Middle Market investments and (ii) a $4.7 million realized loss resulting from the restructure of one Middle Market investment, partially offset by a $4.0 million realized gain from the partial exit of one LMM investment. 106

Table of Contents The following table provides a summary of the total net unrealized appreciation of $63.1 million for the three months ended September 30, 2020:


		Three Months Ended September 30, 2020
				Middle		Private
		LMM(a)		Market (b)		Loan (c)		Other			Total
	****	(dollars in millions)
Accounting reversals of net unrealized (appreciation) depreciation recognized in prior periods due to net realized (gains / income) losses recognized during the current period		$	(5.1)	$	18.8	$	0.7	$	0.0		$	14.4
Net unrealized appreciation relating to portfolio investments			13.9		13.0		16.9		4.9	(b)		48.7
Total net unrealized appreciation relating to portfolio investments		$	8.8	$	31.8	$	17.6	$	4.9		$	63.1

(a)	LMM includes unrealized appreciation on 28 LMM portfolio investments and unrealized depreciation on 17 LMM portfolio investments.
(b)	MM includes unrealized appreciation on 31 MM portfolio investments and unrealized depreciation on 8 MM portfolio investments.
---	---
(c)	PL includes unrealized appreciation on 42 PL portfolio investments and unrealized depreciation on 14 PL portfolio investments.
---	---
(d)	Other includes (i) $2.5 million of net unrealized appreciation relating to the Other Portfolio, (ii) $2.0 million of unrealized appreciation relating to the External Investment Manager, and (iii) $0.4 million of unrealized appreciation relating to deferred compensation plan assets.
---	---

The income tax provision for the three months ended September 30, 2020 of $1.5 million principally consisted of a current tax provision of $1.2 million, related to a $0.8 million provision for current U.S. federal and state income taxes, as well as a $0.4 million provision for excise tax on our estimated undistributed taxable income and a deferred tax provision of $0.3 million, which is primarily the result of the net activity relating to our portfolio investments held in our Taxable Subsidiaries, including changes in loss carryforwards, changes in net unrealized appreciation/depreciation and other temporary book-tax differences.

Comparison of the nine months ended September 30, 2020 and September 30, 2019


	Nine months ended							****
	September 30,				Net Change
	2020		2019		Amount		%
	(dollars in thousands)
Total investment income	$	160,109	$	182,724	$	(22,615)	(12)	%
Total expenses		(61,809)		(64,605)		2,796	(4)	%
Net investment income		98,300		118,119		(19,819)	(17)	%
Net realized loss from investments		(44,323)		(14,163)		(30,160)	NM
Net realized loss on extinguishment of debt		(534)		(5,689)		5,155	NM
Net unrealized appreciation (depreciation) from:
Portfolio investments		(118,030)		13,154		(131,184)	NM
SBIC debentures		460		4,625		(4,165)	NM
Total net unrealized appreciation		(117,570)		17,779		(135,349)	NM
Income tax benefit (provision)		14,253		(2,491)		16,744	NM
Net increase in net assets resulting from operations	$	(49,874)	$	113,555	$	(163,429)	NM

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	Nine months ended							****
	September 30,				Net Change
	2020		2019		Amount		%
	(dollars in thousands, except per share amounts)
Net investment income	$	98,300	$	118,119	$	(19,819)	(17)	%
Share‑based compensation expense		8,215		7,279		936	13	%
Distributable net investment income(a)	$	106,515	$	125,398	$	(18,883)	(15)	%
Net investment income per share—Basic and diluted	$	1.50	$	1.88	$	(0.38)	(20)	%
Distributable net investment income per share—Basic and diluted(a)	$	1.63	$	2.00	$	(0.37)	(19)	%

Not Meaningful

(b)

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Investment Income

Total investment income for the nine months ended September 30, 2020 was $160.1 million, a 12% decrease from the $182.7 million of total investment income for the corresponding period of 2019. This comparable period decrease was principally attributable to (i) a $13.8 million decrease in dividend income from Investment Portfolio equity investments, partially attributable to the current negative impacts of the COVID-19 pandemic on certain of our portfolio companies’ operating results, financial condition and liquidity, as well as the uncertainty relative to the duration of the pandemic’s effects and (ii) a $12.1 million decrease in interest income, primarily due to a decline in floating interest rates on investment portfolio debt investments due to a decline in LIBOR. These decreases were partially offset by a $3.3 million increase in fee income. The $22.6 million decrease in total investment income in the nine months ended September 30, 2020 includes the positive impact of a $1.3 million increase from accelerated prepayment, repricing and other income activity considered less consistent or non-recurring.

Expenses

Total expenses for the nine months ended September 30, 2020 decreased to $61.8 million from $64.6 million in the corresponding period of 2019. This decrease in operating expenses was principally attributable to a $3.6 million decrease in compensation expense, partially offset by a $0.9 million increase in share-based compensation expense. The decrease in compensation expense is primarily related to a $4.1 million decrease in cash incentive compensation accruals.

Net Investment Income

Net investment income for the nine months ended September 30, 2020 decreased 17% to $98.3 million, or $1.50 per share, compared to net investment income of $118.1 million, or $1.88 per share, for the corresponding period of 2019. The decrease in net investment income was principally attributable to the decrease in total investment income, partially offset by lower operating expenses, both as discussed above. The decrease in net investment income per share reflects these changes, as well as the 4.2% increase in weighted average shares outstanding to 65.3 million for the nine months ended September 30, 2020, primarily due to shares issued through the ATM Program (as defined in “—Liquidity and Capital Resources—Capital Resources” below), shares issued pursuant to our equity incentive plans and shares 108

Table of Contents issued pursuant to our dividend reinvestment plan. The decline in net investment income on a per share basis includes the impacts of (i) an increase of $0.02 per share due to the increase in investment income from accelerated prepayment, repricing and other income activity considered non-recurring, as discussed above, and (ii) an increase of $0.01 per share due to the decrease in compensation expense as a result of the decrease in the fair value of the deferred compensation plan assets.

Distributable Net Investment Income

Distributable net investment income for the nine months ended September 30, 2020 decreased 15% to $106.5 million, or $1.63 per share, compared with $125.4 million, or $2.00 per share, in the corresponding period of 2019. The decline in distributable net investment income was primarily due to the decreased level of total investment income, partially offset by lower operating expenses, both as discussed above. The decline in distributable net investment income on a per share basis for the nine months ended September 30, 2020 also reflects a greater number of average shares outstanding compared to the corresponding period in 2019, as described above. The decline in distributable net investment income on a per share basis includes the impacts of (i) the increase in investment income from accelerated prepayment, repricing and other income activity considered non-recurring and (ii) the decrease in compensation expense as a result of the decrease in the fair value of the deferred compensation plan assets, as discussed above.

Net Increase (Decrease) in Net Assets Resulting from Operations

The net increase (decrease) in net assets resulting from operations for the nine months ended September 30, 2020 was $(49.9) million, or $(0.76) per share, compared with $113.6 million, or $1.81 per share, during the nine months ended September 30, 2019. This $163.4 million decrease from the prior year’s comparable period was primarily the result of (i) a $131.2 million decrease in net unrealized appreciation (depreciation) from portfolio investments, primarily caused by the adverse economic effects of the COVID-19 pandemic, (ii) a $30.2 million increase in net realized loss from investments and (iii) a $19.8 million decrease in net investment income, as discussed above. These decreases were partially offset by (i) a $16.7 million benefit from the change in income tax benefit (provision) and (ii) a $1.0 million improvement in the net impact from the extinguishment of debt. The $44.3 million net realized loss on investments for the nine months ended September 30, 2020 was primarily the result of (i) the $15.8 million net realized loss from the full exit of three and partial exit of three LMM investments, (ii) the $22.5 million realized loss from the exit of six Middle Market investment, and (iii) the $4.7 million realized loss from the restructure of one Middle Market investment.

The following table provides a summary of the total net unrealized depreciation of $117.6 million for the nine months ended September 30, 2020:


		Nine Months Ended September 30, 2020
				Middle		Private
		LMM(a)		Market (b)		Loan (c)		Other			Total
	****	(dollars in millions)
Accounting reversals of net unrealized (appreciation) depreciation recognized in prior periods		$	7.9	$	27.0	$	3.3	$	0.0		$	38.2
due to net realized (gains / income) losses recognized during the current period			(48.0)		(51.1)		(39.8)		(17.4)	(d)		(156.3)
Net unrealized depreciation relating to portfolio investments		$	(40.1)	$	(24.1)	$	(36.5)	$	(17.4)		$	(118.1)

Unrealized appreciation relating to SBIC debentures (e)												0.5
Total net unrealized depreciation											$	(117.6)

(a)	LMM includes unrealized appreciation on 27 LMM portfolio investments and unrealized depreciation on 37 LMM portfolio investments.
(b)	MM includes unrealized appreciation on 9 MM portfolio investments and unrealized depreciation on 38 MM portfolio investments.
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(c)	PL includes unrealized appreciation on 9 PL portfolio investments and unrealized depreciation on 52 PL portfolio investments.
(d)	Other includes (i) $14.1 million of net unrealized depreciation relating to the Other Portfolio and (ii) $3.4 million of unrealized depreciation relating to the External Investment Manager.
---	---
(e)	Relates to unrealized depreciation on the SBIC debentures previously issued by MSC II which were accounted for on a fair value basis.
---	---

The income tax benefit for the nine months ended September 30, 2020 of $14.3 million principally consisted of a deferred tax benefit of $15.7 million, which is primarily the result of the net activity relating to our portfolio investments held in our Taxable Subsidiaries, including changes in loss carryforwards, changes in net unrealized appreciation/depreciation and other temporary book-tax differences, partially offset by a current tax provision of $1.4 million related to a $1.1 million provision for excise tax on our estimated undistributed taxable income and a $0.3 million provision for current U.S. federal and state income taxes.

Liquidity and Capital Resources

This “Liquidity and Capital Resources” section should be read in conjunction with the “COVID-19 Update” section above.

Cash Flows

For the nine months ended September 30, 2020, we experienced a net decrease in cash and cash equivalents in the amount of $28.1 million, which is the net result of $28.3 million of cash used in our operating activities and $0.2 million of cash provided by our financing activities.

The $28.3 million of cash used in our operating activities resulted primarily from cash uses totaling $414.6 million for the funding of new portfolio company investments and settlement of accruals for portfolio investments existing as of December 31, 2019, partially offset by (i) cash proceeds totaling $276.3 million from the sales and repayments of debt investments and sales of and return on capital of equity investments, (ii) cash flows we generated from the operating profits earned totaling $95.1 million, which is our distributable net investment income, excluding the non-cash effects of the accretion of unearned income, payment-in-kind interest income, cumulative dividends and the amortization expense for deferred financing costs, and (iii) cash proceeds of $14.9 million related to changes in other assets and liabilities.

The $0.2 million of cash provided by our financing activities principally consisted of (i) $125.0 million in proceeds from the follow-on issuance of the 5.20% Notes in July 2020, (ii) $37.6 million in net cash proceeds from our ATM Program (described below) and direct stock purchase plan, (iii) $35.0 million in cash proceeds from the issuance of SBIC debentures and (iv) $1.0 million for debt issuance premiums, net of payments of deferred debt issuance costs, SBIC debenture fees and other costs, partially offset by (i) $107.7 million in cash dividends paid to stockholders, (ii) $47.0 million in net repayments from the Credit Facility, (iii) $42.0 million in repayment of SBIC debentures, and (iv) $1.8 million for purchases of vested restricted stock from employees to satisfy their tax withholding requirements upon the vesting of such restricted stock.

Capital Resources

As of September 30, 2020, we had $27.1 million in cash and cash equivalents and $487.0 million of unused capacity under the Credit Facility, which we maintain to support our investment and operating activities. As of September 30, 2020, our net asset value totaled $1,423.2 million, or $21.52 per share.

The Credit Facility, which provides additional liquidity to support our investment and operational activities, includes total commitments of $740.0 million from a diversified group of 18 lenders. The Credit Facility matures in September 2023 and contains an accordion feature which allows us to increase the total commitments under the facility to up to $800.0 million from new and existing lenders on the same terms and conditions as the existing commitments. Borrowings under the Credit Facility bear interest, subject to our election and resetting on a monthly basis on the first of 110

Table of Contents each month, on a per annum basis at a rate equal to the applicable LIBOR rate (0.1% as of September 30, 2020) plus (i) 1.875% (or the applicable base rate (Prime Rate of 3.25% as of September 30, 2020) plus 0.875%) as long as we meet certain agreed upon excess collateral and maximum leverage requirements or (ii) 2.0% (or the applicable base rate plus 1.0%) otherwise. We pay unused commitment fees of 0.25% per annum on the unused lender commitments under the Credit Facility. The Credit Facility is secured by a first lien on the assets of MSCC and its subsidiaries, excluding the equity ownership or assets of the Funds and the External Investment Manager. The Credit Facility contains certain affirmative and negative covenants, including but not limited to: (i) maintaining a minimum availability of at least 10% of the borrowing base, (ii) maintaining an interest coverage ratio of at least 2.0 to 1.0, (iii) maintaining an asset coverage ratio (tangible net worth to Credit Facility borrowings) of at least 1.5 to 1.0 and (iv) maintaining a minimum tangible net worth. The Credit Facility is provided on a revolving basis through its final maturity date in September 2023, and contains two, one-year extension options which could extend the final maturity by up to two years, subject to certain conditions, including lender approval. As of September 30, 2020, we had $253.0 million in borrowings outstanding under the Credit Facility, the interest rate on the Credit Facility was 2.0% (based on the LIBOR rate of 0.2% as of the most recent reset date of September 1, 2020 plus 1.875%) and we were in compliance with all financial covenants of the Credit Facility.

Through the Funds, we have the ability to issue SBIC debentures guaranteed by the SBA at favorable interest rates and favorable terms and conditions. Under existing SBIC regulations, SBA-approved SBICs under common control have the ability to issue debentures guaranteed by the SBA up to a regulatory maximum amount of $350.0 million. Under existing SBA-approved commitments, we had $304.8 million of outstanding SBIC debentures guaranteed by the SBA as of September 30, 2020 through our wholly owned SBICs, which bear a weighted-average annual fixed interest rate of approximately 3.4%, paid semiannually, and mature ten years from issuance. The first maturity related to our SBIC debentures occurs in 2020, and the weighted-average remaining duration is approximately 5.5 years as of September 30, 2020. During the nine months ended September 30, 2020, Main Street issued $35.0 million of SBIC debentures and opportunistically prepaid $42.0 million of existing SBIC debentures that were scheduled to mature over the next year as part of an effort to manage the maturity dates of the oldest SBIC debentures. Debentures guaranteed by the SBA have fixed interest rates that equal prevailing 10-year Treasury Note rates plus a market spread and have a maturity of ten years with interest payable semiannually. The principal amount of the debentures is not required to be paid before maturity, but may be pre-paid at any time with no prepayment penalty. We expect to issue new SBIC debentures under the SBIC program in the future in an amount up to the regulatory maximum amount for affiliated SBIC funds.

In November 2014, we issued $175.0 million in aggregate principal amount of 4.50% unsecured notes due 2019 (the “4.50% Notes due 2019”) at an issue price of 99.53%. The 4.50% Notes due 2019 bore interest at a rate of 4.50% per year payable semiannually on June 1 and December 1 of each year. On December 2, 2019, we repaid the entire principal amount of the issued and outstanding 4.50% Notes due 2019, effective December 1, 2019 (the “Maturity Date”), at par value plus the accrued and unpaid interest thereon from June 1, 2019 through the Maturity Date.

In November 2017, we issued $185.0 million in aggregate principal amount of 4.50% unsecured notes due December 1, 2022 (the “4.50% Notes due 2022”) at an issue price of 99.16%. The 4.50% Notes due 2022 are unsecured obligations and rank pari passu with our current and future unsecured indebtedness; senior to any of our future indebtedness that expressly provides it is subordinated to the 4.50% Notes due 2022; effectively subordinated to all of our existing and future secured indebtedness, to the extent of the value of the assets securing such indebtedness, including borrowings under our Credit Facility; and structurally subordinated to all existing and future indebtedness and other obligations of any of our subsidiaries, including without limitation, the indebtedness of the Funds. The 4.50% Notes due 2022 may be redeemed in whole or in part at any time at our option subject to certain make-whole provisions. The 4.50% Notes due 2022 bear interest at a rate of 4.50% per year payable semiannually on June 1 and December 1 of each year. We may from time to time repurchase the 4.50% Notes due 2022 in accordance with the 1940 Act and the rules promulgated thereunder. As of September 30, 2020, the outstanding balance of the 4.50% Notes due 2022 was $185.0 million.

The indenture governing the 4.50% Notes due 2022 (the “4.50% Notes Indenture”) contains certain covenants, including covenants requiring our compliance with (regardless of whether we are subject to) the asset coverage requirements set forth in Section 18(a)(1)(A) as modified by Section 61(a)(1) of the 1940 Act, as well as covenants requiring us to provide financial information to the holders of the 4.50% Notes due 2022 and the Trustee if we cease to 111

Table of Contents be subject to the reporting requirements of the Exchange Act. These covenants are subject to limitations and exceptions that are described in the 4.50% Notes Indenture.

In April 2019, we issued $250.0 million in aggregate principal amount of 5.20% unsecured Notes due May 1, 2024 (the “5.20% Notes”) at an issue price of 99.125%. Subsequently, in December 2019, we issued an additional $75.0 million of the 5.20% Notes at an issue price of 105.0%. Also in July 2020, we issued an additional $125.0 million aggregate principal amount of the 5.20% Notes at an issue price of 102.674%, for total net proceeds to us, resulting from the issue price and after underwriting discounts and estimated offering expenses payable by us, of approximately $127.3 million. The 5.20% Notes issued in December 2019 and July 2020 have identical terms as, and are a part of a single series with, the 5.20% Notes issued in April 2019. The aggregate net proceeds from the 5.20% Notes issuances were used to repay a portion of the borrowings outstanding under the Credit Facility. The 5.20% Notes are unsecured obligations and rank pari passu with our current and future unsecured indebtedness; senior to any of our future indebtedness that expressly provides it is subordinated to the 5.20% Notes; effectively subordinated to all of our existing and future secured indebtedness, to the extent of the value of the assets securing such indebtedness, including borrowings under our Credit Facility; and structurally subordinated to all existing and future indebtedness and other obligations of any of our subsidiaries, including without limitation, the indebtedness of the Funds. The 5.20% Notes may be redeemed in whole or in part at any time at our option subject to certain make-whole provisions. The 5.20% Notes bear interest at a rate of 5.20% per year payable semiannually on May 1 and November 1 of each year. We may from time to time repurchase the 5.20% Notes in accordance with the 1940 Act and the rules promulgated thereunder. As of September 30, 2020, the outstanding balance of the 5.20% Notes was $450.0 million.

The indenture governing the 5.20% Notes (the “5.20% Notes Indenture”) contains certain covenants, including covenants requiring our compliance with (regardless of whether we are subject to) the asset coverage requirements set forth in Section 18(a)(1)(A) as modified by Section 61(a)(1) of the 1940 Act, as well as covenants requiring us to provide financial information to the holders of the 5.20% Notes and the Trustee if we cease to be subject to the reporting requirements of the Exchange Act. These covenants are subject to limitations and exceptions that are described in the 5.20% Notes Indenture.

We maintain a program with certain selling agents through which we can sell shares of our common stock by means of at-the-market offerings from time to time (the “ATM Program”). During the nine months ended September 30, 2020, we sold 1,154,937 shares of our common stock at a weighted-average price of $32.67 per share and raised $37.7 million of gross proceeds under the ATM Program. Net proceeds were $37.2 million after commissions to the selling agents on shares sold and offering costs. As of September 30, 2020, sales transactions representing 2,603 shares had not settled and are not included in shares issued and outstanding on the face of the consolidated balance sheet but are included in the weighted-average shares outstanding in the consolidated statement of operations and in the shares used to calculate net asset value per share. As of September 30, 2020, 7,204,213 shares remained available for sale under the ATM Program.

During the year ended December 31, 2019, we sold 2,247,187 shares of our common stock at a weighted-average price of $40.05 per share and raised $90.0 million of gross proceeds under the ATM Program. Net proceeds were $88.8 million after commissions to the selling agents on shares sold and offering costs.

We anticipate that we will continue to fund our investment activities through existing cash and cash equivalents, cash flows generated through our ongoing operating activities, utilization of available borrowings under our Credit Facility, and a combination of future issuances of debt and equity capital. Our primary uses of funds will be investments in portfolio companies, operating expenses and cash distributions to holders of our common stock.

We periodically invest excess cash balances into marketable securities and idle funds investments. The primary investment objective of marketable securities and idle funds investments is to generate incremental cash returns on excess cash balances prior to utilizing those funds for investment in our LMM, Middle Market and Private Loan portfolio investments. Marketable securities and idle funds investments generally consist of debt investments, independently rated debt investments, certificates of deposit with financial institutions, diversified bond funds and publicly traded debt and equity investments.

If our common stock trades below our net asset value per share, we will generally not be able to issue additional common stock at the market price, unless our stockholders approve such a sale and our Board of Directors makes certain 112

Table of Contents determinations. We did not seek stockholder authorization to sell shares of our common stock below the then current net asset value per share of our common stock at our 2020 annual meeting of stockholders because our common stock price per share has generally traded significantly above the net asset value per share of our common stock since 2011. We would therefore need future approval from our stockholders to issue shares below the then current net asset value per share.

In order to satisfy the Code requirements applicable to a RIC, we intend to distribute to our stockholders, after consideration and application of our ability under the Code to carry forward certain excess undistributed taxable income from one tax year into the next tax year, substantially all of our taxable income. In addition, as a BDC, we generally are required to meet a coverage ratio of total assets to total senior securities, which include borrowings and any preferred stock we may issue in the future, of at least 200% (or 150% if certain requirements are met). This requirement limits the amount that we may borrow. In January 2008, we received an exemptive order from the SEC to exclude SBA-guaranteed debt securities issued by MSMF and any other wholly owned subsidiaries of ours which operate as SBICs from the asset coverage requirements of the 1940 Act as applicable to us, which, in turn, enables us to fund more investments with debt capital.

Although we have been able to secure access to additional liquidity, including through the Credit Facility, public debt issuances, leverage available through the SBIC program and equity offerings, there is no assurance that debt or equity capital will be available to us in the future on favorable terms, or at all.

Recently Issued or Adopted Accounting Standards

In March 2020, the FASB issued ASU 2020-04, “Reference rate reform (Topic 848)—Facilitation of the effects of reference rate reform on financial reporting.” The amendments in this update provide optional expedients and exceptions for applying U.S. GAAP to certain contracts and hedging relationships that reference LIBOR or another reference rate expected to be discontinued due to reference rate reform and became effective upon issuance for all entities. We have agreements that have LIBOR as a reference rate with certain portfolio companies and also with certain lenders. Many of these agreements include language for choosing an alternative successor rate if LIBOR reference is no longer considered to be appropriate. Contract modifications are required to be evaluated in determining whether the modifications result in the establishment of new contracts or the continuation of existing contracts. We adopted this amendment in March 2020 and plan to apply the amendments in this update to account for contract modifications due to changes in reference rates. We continue to evaluate the impact that the amendments in this update will have on our consolidated financial statements and disclosures when applied.

In May 2020, the SEC published Release No. 33-10786 (the “Release”), Amendments to Financial Disclosures about Acquired and Disposed Businesses, announcing its adoption of rules amending Rule 1-02(w)(2) used in the determination of a significant subsidiary specific to investment companies, including BDCs. In part, the rules adopted pursuant to the Release eliminated the use of the asset test, and amended the income and investment tests for determining whether an unconsolidated subsidiary requires additional disclosure in the footnotes of the financial statements. We adopted the rules adopted pursuant to the Release during the quarter ended June 30, 2020. The impact of the adoption of these rules on our consolidated financial statements was not material.

From time to time, new accounting pronouncements are issued by the FASB or other standards setting bodies that are adopted by us as of the specified effective date. We believe that the impact of recently issued standards and any that are not yet effective will not have a material impact on our consolidated financial statements upon adoption.

Inflation

Inflation has not had a significant effect on our results of operations in any of the reporting periods presented herein. However, our portfolio companies have experienced, and may in the future experience, the impacts of inflation on their operating results, including periodic escalations in their costs for labor, raw materials and third-party services and required energy consumption. 113

Table of Contents Off-Balance Sheet Arrangements

We may be a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financial needs of our portfolio companies. These instruments include commitments to extend credit and fund equity capital and involve, to varying degrees, elements of liquidity and credit risk in excess of the amount recognized in the balance sheet. At September 30, 2020, we had a total of $125.0 million in outstanding commitments comprised of (i) forty-three investments with commitments to fund revolving loans that had not been fully drawn or term loans with additional commitments not yet funded and (ii) ten investments with equity capital commitments that had not been fully called.

Contractual Obligations

As of September 30, 2020, the future fixed commitments for cash payments in connection with our SBIC debentures, the 4.50% Notes due 2022, the 5.20% Notes and rent obligations under our office lease for each of the next five years and thereafter are as follows:


	2020		2021		2022		2023		2024		Thereafter		Total
SBIC debentures	$	-	$	40,000	$	-	$	16,000	$	63,800	$	185,000	$	304,800
Interest due on SBIC debentures		-		9,726		8,719		8,464		7,016		20,303		54,228
4.50% Notes due 2022		-		-		185,000		-		-		-		185,000
Interest due on 4.50% Notes due 2022		4,163		8,325		8,325		-		-		-		20,813
5.20% Notes due 2024		-		-		-		-		450,000		-		450,000
Interest due on 5.20% Notes due 2024		11,700		23,400		23,400		23,400		11,700		-		93,600
Operating Lease Obligation (1)		191		776		790		804		818		2,610		5,989
Total	$	16,054	$	82,227	$	226,234	$	48,668	$	533,334	$	207,913	$	1,114,430

(1)	Operating Lease Obligation means a rent payment obligation under a lease classified as an operating lease and disclosed pursuant to ASC 842, as may be modified or supplemented.

As of September 30, 2020, we had $253.0 million in borrowings outstanding under our Credit Facility, and the Credit Facility is currently scheduled to mature in September 2023. The Credit Facility contains two, one-year extension options which could extend the maturity to September 2025, subject to lender approval. See further discussion of the Credit Facility terms in “—Liquidity and Capital Resources—Capital Resources.”

Related Party Transactions

As discussed further above, the External Investment Manager is treated as a wholly owned portfolio company of MSCC and is included as part of our Investment Portfolio. At September 30, 2020, we had a receivable of approximately $2.4 million due from the External Investment Manager, which included approximately $2.0 million related primarily to operating expenses incurred by us as required to support the External Investment Manager’s business and amounts due from the External Investment Manager to Main Street under a tax sharing agreement (see further discussion above in “—Critical Accounting Policies—Income Taxes”) and approximately $0.3 million of dividends declared but not paid by the External Investment Manager.

In November 2015, our Board of Directors approved and adopted the Main Street Capital Corporation Deferred Compensation Plan (the “2015 Deferred Compensation Plan”). The 2015 Deferred Compensation Plan became effective on January 1, 2016 and replaced the Deferred Compensation Plan for Non-Employee Directors previously adopted by the Board of Directors in June 2013 (the “2013 Deferred Compensation Plan”). Under the 2015 Deferred Compensation Plan, non-employee directors and certain key employees may defer receipt of some or all of their cash compensation and directors’ fees, subject to certain limitations. Individuals participating in the 2015 Deferred Compensation Plan receive distributions of their respective balances based on predetermined payout schedules or other events as defined by the plan and are also able to direct investments made on their behalf among investment alternatives permitted from time to time under the plan, including phantom Main Street stock units. As of September 30, 2020, $10.0 million of compensation and directors’ fees had been deferred under the 2015 Deferred Compensation Plan (including amounts previously deferred under the 2013 Deferred Compensation Plan). Of this amount, $5.0 million was deferred into phantom Main Street stock units, representing 152,633 shares of our common stock. Including phantom stock units issued through dividend reinvestment and net of any shares distributed, the phantom stock units outstanding as of September 30, 2020 114

Table of Contents represented 157,201 shares of our common stock. Any amounts deferred under the plan represented by phantom Main Street stock units will not be issued or included as outstanding on the consolidated statements of changes in net assets until such shares are actually distributed to the participant in accordance with the plan, but the related phantom stock units are included in weighted-average shares outstanding with the related dollar amount of the deferral included in total expenses in Main Street’s consolidated statements of operations as earned. The dividend amounts related to additional phantom stock units are included in the statements of changes in net assets as an increase to dividends to stockholders offset by a corresponding increase to additional paid-in capital.

Recent Developments

During November 2020, we declared regular monthly dividends of $0.205 per share for each month of January, February and March of 2021. These regular monthly dividends equal a total of $0.615 per share for the first quarter of 2021, unchanged from the regular monthly dividends paid in the first quarter of 2020. Including the regular monthly dividends declared for the fourth quarter of 2020 and first quarter of 2021, we will have paid $30.215 per share in cumulative dividends since our October 2007 initial public offering.

Also, during November 2020, we expanded the total commitments under the Credit Facility from $740.0 million to $780.0 million. The $40.0 million net increase in total commitments was the result of the addition of a new lender relationship, which further diversifies our lending group under the Credit Facility to a total of 19 participants. The recent increase in total commitments was executed under the accordion feature of the Credit Facility, which allows for an increase up to $800.0 million in total commitments under the facility from new and existing lenders on the same terms and conditions as the existing commitments.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

We are subject to financial market risks, including changes in interest rates, and changes in interest rates may affect both our interest expense on the debt outstanding under our Credit Facility and our interest income from portfolio investments. Our risk management systems and procedures are designed to identify and analyze our risk, to set appropriate policies and limits and to continually monitor these risks. Our investment income will be affected by changes in various interest rates, including LIBOR and prime rates, to the extent that any debt investments include floating interest rates. See “Risk Factors—Risks Relating to Our Business and Structure -The interest rates of our floating-rate loans to our portfolio companies and for any of our borrowings that extend beyond 2021 might be subject to change based on recent regulatory changes” included in our Form 10-K for the fiscal year ended December 31, 2019 for more information regarding risks associated with our debt investments and borrowings that utilize LIBOR as a reference rate.

The majority of our debt investments are made with either fixed interest rates or floating rates that are subject to contractual minimum interest rates for the term of the investment. As of September 30, 2020, approximately 72% of our debt investment portfolio (at cost) bore interest at floating rates, 84% of which were subject to contractual minimum interest rates. Our interest expense will be affected by changes in the published LIBOR rate in connection with our Credit Facility; however, the interest rates on our outstanding SBIC debentures, 4.50% Notes due 2022 and 5.20% Notes, which collectively comprise the majority of our outstanding debt, are fixed for the life of such debt. As of September 30, 2020, we had not entered into any interest rate hedging arrangements. Due to our limited use of 115

Table of Contents derivatives, we have claimed an exclusion from the definition of the term “commodity pool operator” under the Commodity Exchange Act and, therefore, are not subject to registration or regulation as a pool operator under such Act. The following table shows the approximate annualized increase or decrease in the components of net investment income due to hypothetical base rate changes in interest rates, assuming no changes in our investments and borrowings as of September 30, 2020.


	****	Increase		****	(Increase)		****	Increase		****	Increase
		(Decrease)			Decrease			(Decrease) in Net			(Decrease) in Net
		in Interest			in Interest			Investment			Investment
Basis Point Change		Income			Expense			Income			Income per Share
		(dollars in thousands, except per share amounts)
(150)		$	(974)		$	392		$	(582)		$	(0.01)
(125)			(883)			392			(491)			(0.01)
(100)			(783)			392			(391)			(0.01)
(75)			(683)			392			(291)			—
(50)			(583)			392			(191)			—
(25)			(483)			392			(91)			—
25			626			(633)			(7)			—
50			1,280			(1,265)			15			—
75			1,965			(1,898)			67			—
100			4,581			(2,530)			2,051			0.03
125			7,712			(3,163)			4,549			0.07
150			11,029			(3,795)			7,234			0.11

The hypothetical results assume that all LIBOR and prime rate changes would be effective on the first day of the period. However, the contractual LIBOR and prime rate reset dates would vary throughout the period, on either a monthly or quarterly basis, for both our investments and our Credit Facility. The hypothetical results would also be impacted by the changes in the amount of debt outstanding under our Credit Facility (with an increase (decrease) in the debt outstanding under the Credit Facility resulting in an (increase) decrease in the hypothetical interest expense).

Item 4. Controls and Procedures

As of the end of the period covered by this report, we carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer, President, Chief Financial Officer, Chief Compliance Officer and Chief Accounting Officer, of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rule 13a-15 of the Exchange Act). Based on that evaluation, our Chief Executive Officer, President, Chief Financial Officer, Chief Compliance Officer and Chief Accounting Officer have concluded that our current disclosure controls and procedures are effective in timely alerting them of material information relating to us that is required to be disclosed in the reports we file or submit under the Exchange Act. There have been no changes in our internal control over financial reporting that occurred during the quarter ended September 30, 2020 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. We have not experienced any material impact to our internal controls over financial reporting despite the fact that many of our employees are working remotely due to the COVID-19 pandemic. We are continually monitoring and assessing the COVID-19 situation on our internal controls to minimize the impact on their design and operating effectiveness.

PART II—OTHER INFORMATION

Item 1. Legal Proceedings

We may, from time to time, be involved in litigation arising out of our operations in the normal course of business or otherwise. Furthermore, third parties may seek to impose liability on us in connection with the activities of our portfolio companies. While the outcome of any current legal proceedings cannot at this time be predicted with certainty, we do not expect any current matters will materially affect our financial condition or results of operations; however, there can be no assurance whether any pending legal proceedings will have a material adverse effect on our financial condition or results of operations in any future reporting period.

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Table of Contents Item 1A. Risk Factors

You should carefully consider the risks described below and all other information contained in this Quarterly Report on Form 10-Q, including our interim financial statements and the related notes thereto, before making a decision to purchase our securities. The risks and uncertainties described below are not the only ones facing us. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may have a material adverse effect on our business, financial condition and/or operating results, as well as the market price of our securities.

In addition to the other information set forth in this report, you should carefully consider the risk factors previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2019 that we filed with the SEC on February 28, 2020 and in each of our Quarterly Reports on Form 10-Q for the quarters ended March 31, 2020 and June 30, 2020 that we filed with the SEC on May 8, 2020 and August 7, 2020, respectively, which could materially affect our business, financial condition or operating results.

There are no material changes to the risk factors as previously disclosed in these reports.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

During the three months ended September 30, 2020, we issued 132,583 shares of our common stock under our dividend reinvestment plan. These issuances were not subject to the registration requirements of the Securities Act of 1933, as amended. The aggregate value of the shares of common stock issued during the three months ended September 30, 2020 under the dividend reinvestment plan was approximately $4.1 million.

Upon vesting of restricted stock awarded pursuant to our employee equity compensation plan, shares may be withheld to meet applicable tax withholding requirements. Any withheld shares are treated as common stock purchases by the Company in our consolidated financial statements as they reduce the number of shares received by employees upon vesting (see “Purchase of vested stock for employee payroll tax withholding” in the consolidated statements of changes in net assets for share amounts withheld).

Item 5. Other Information

On November 4, 2020, Main Street Capital Corporation (“Main Street”) entered into that certain Supplement Agreement (the “Supplement”) to the Third Amended and Restated Credit Agreement, dated June 5, 2018, (as amended, restated, supplemented or otherwise modified from time to time, the “Credit Agreement”), among Main Street, as borrower, Main Street Capital Partners, LLC, Main Street Equity Interests, Inc., Main Street CA Lending, LLC and MS International Holdings, Inc., as guarantors, Truist Bank (“Truist”) (f/k/a Branch Banking and Trust Company), Frost Bank, Royal Bank of Canada, Hancock Whitney Bank, ZB, N.A. dba Amegy Bank, Texas Capital Bank, N.A., Cadence Bank, N.A., Trustmark National Bank, BancorpSouth Bank, Comerica Bank, Raymond James Bank, N.A., BOKF, NA dba Bank of Texas, Woodforest National Bank, City National Bank, Veritex Community Bank, First National Bank of Pennsylvania, Mutual of Omaha Bank and First Financial Bank, N.A., collectively as lenders, and Truist, as administrative agent, to add Sumitomo Mitsui Banking Corporation as a lender and increase the total commitments under the Credit Agreement from $740.0 million to $780.0 million.

Truist, Royal Bank of Canada, Comerica Bank, Raymond James Bank, N.A. and the other lenders under the Credit Agreement, and their respective affiliates, may from time to time receive customary fees and expenses in the performance of investment banking, financial advisory or other services for Main Street.

The above summary is not complete and is qualified in its entirety to the full text of the Credit Agreement as amended by the Supplement and related documents.

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Table of Contents Item 6. Exhibits

Listed below are the exhibits which are filed as part of this report (according to the number assigned to them in Item 601 of Regulation S-K):


Exhibit<br>Number		Description of Exhibit
10.1		Investment Advisory and Administrative Services Agreement dated October 30, 2020 by and between MSC Income Fund, Inc. and MSC Adviser I, LLC (previously filed as Exhibit 10.1 to Main Street Capital Corporation’s Current Report on Form 8-K filed on November 3, 2020 (File No. 41-33723)).
10.2		Supplement Agreement dated November 4, 2020.
31.1		Certification of Chief Executive Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934.
31.2		Certification of Chief Financial Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934.
32.1		Certification of Chief Executive Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350).
32.2		Certification of Chief Financial Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350).

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Table of Contents SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.


	Main Street Capital Corporation
	/s/ DWAYNE L. HYZAK
Date: November 6, 2020	Dwayne L. Hyzak
	Chief Executive Officer
	(principal executive officer)
	/s/ BRENT D. SMITH
Date: November 6, 2020	Brent D. Smith
	Chief Financial Officer and Treasurer
	(principal financial officer)
	/s/ LANCE A. PARKER
Date: November 6, 2020	Lance A. Parker
	Vice President and Chief Accounting Officer
	(principal accounting officer)

119

Exhibit 10.2

EXECUTION VERSION

SUPPLEMENT AGREEMENT

This SUPPLEMENT AGREEMENT (this “Agreement”), dated as of November 4, 2020 (the “Effective Date”), which is being executed and delivered pursuant to the Credit Agreement (defined below), is among Main Street Capital Corporation, a Maryland corporation (the “Borrower”), the guarantors party thereto (the “Guarantors”), Truist Bank, as administrative agent and successor in interest to Branch Banking and Trust Company (the “Administrative Agent”), Sumitomo Mitsui Banking Corporation, as a new lender (the “New Lender”) and First Financial Bank, N.A., as an existing lender with a decreasing commitment (the “Decreasing Lender”).

RECITALS

The Borrower, the Guarantors, the lenders party thereto and the Administrative Agent are parties to that certain Third Amended and Restated Credit Agreement, dated as of June 5, 2018, as amended by that certain First Amendment to Third Amended and Restated Credit Agreement dated as of May 28, 2020 (as further amended, restated, supplemented or otherwise modified from time to time, the “Credit Agreement”). Capitalized terms used herein and not otherwise defined herein shall have the meanings assigned to such terms in the Credit Agreement.

Pursuant to Section 2.14 of the Credit Agreement, the Borrower has notified the Administrative Agent that the Borrower proposes to increase the aggregate Revolver Commitments under the Credit Agreement by $40,000,000, from the current $740,000,000 to $780,000,000. The New Lender has agreed to provide a Revolver Commitment in the amount of $55,000,000 (the “Specified Commitment Increase”). The Decreasing Lender has agreed to reduce its Revolver Commitment from $25,000,000 to $10,000,000.

The parties to this Agreement are entering into this Agreement for purposes of consenting to and effecting the Specified Commitment Increase.

NOW, THEREFORE, in consideration of the Recitals and the mutual promises contained herein and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the New Lender, the Borrower, the Guarantors, and the Administrative Agent, intending to be legally bound hereby, agree as follows:

SECTION 1. Recitals. The Recitals are incorporated herein by reference and shall be deemed to be a part of this Agreement.

SECTION 2. New Lender; Consent.

(a) The New Lender hereby agrees, as of the Effective Date, to provide a Revolver Commitment in the amount of $55,000,000, and the New Lender agrees to perform all of the obligations which by the terms of the Credit Agreement and the other Loan Documents are required to be performed by it as a Lender thereunder. The Borrower shall deliver to the New Lender a Revolver Note in the amount of the New Lender’s

Revolver Commitment (such Revolver Note is hereinafter referred to as the “New Note”), executed by the Borrower. All references contained in the Credit Agreement and the other Loan Documents to the “Revolver Notes” shall include the New Note as supplemented, modified, amended, renewed or extended from time to time.

(b) By executing and delivering this Agreement, the New Lender hereby becomes a party to the Credit Agreement as a Lender thereunder with the same force and effect as if originally named therein as a Lender and, without limiting the generality of the foregoing, the New Lender hereby expressly assumes all obligations and liabilities of a Lender thereunder. The New Lender represents and warrants that it is an Eligible Assignee, and the Administrative Agent hereby approves the New Lender as an Eligible Assignee. The New Lender represents and warrants that (i) it has full power and authority, and has taken all action necessary, to execute and deliver this Agreement and to consummate the transactions contemplated hereby and to become a Lender under the Credit Agreement, (ii) from and after the Effective Date of this Agreement, it shall be bound by the provisions of the Credit Agreement as a Lender thereunder and shall have and perform all of the obligations of a Lender thereunder, (iii) it is sophisticated with respect to decisions to acquire assets of the type represented by the Revolver Commitment and either it, or the Person exercising discretion in making its decision to acquire the Revolver Commitment, is experienced in acquiring assets of such type and (iv) it has received a copy of the Credit Agreement, together with copies of the most recent financial statements of the Borrower delivered pursuant to Section 5.01 of the Credit Agreement, as applicable, and such other documents and information as it has deemed appropriate to make its own credit analysis and decision to enter into this Agreement and to extend its Revolver Commitment to the Borrower pursuant to the terms of the Credit Agreement, on the basis of which it has made such analysis and decision independently and without reliance on the Administrative Agent or any other Lender. The New Lender agrees that it will, independently and without reliance on the Administrative Agent or any other Lender, and based on such documents and information as it shall deem appropriate at the time, continue to make its own credit decisions and analysis in taking or not taking action under the Credit Agreement or any other Loan Documents. This Agreement constitutes a joinder agreement for purposes of Section 2.14 of the Credit Agreement.

SECTION 3. Decreasing Commitment. The Decreasing Lender hereby reduces its Revolving Commitment from $25,000,000 to $10,000,000.

SECTION 4. New Schedule to Credit Agreement. Schedule 2.01 to the Credit Agreement is, per Section 2.14 of the Credit Agreement, deemed amended in its entirety to read as set forth on Exhibit A attached to this Agreement. The amount of each Lender’s total Revolver Commitment is the amount set forth opposite the name of such Lender on Schedule 2.01.

SECTION 5. Obligations of Lenders. Each party hereto acknowledges and agrees that the Revolver Commitments of the New Lender and the other Lenders under the Credit Agreement are several and not joint commitments and obligations of such Lenders.

SECTION 6. Conditions to Effectiveness. Each party hereto agrees that this Agreement and the effectiveness of the Specified Commitment Increase as provided in this Agreement shall be subject to satisfaction by the Loan Parties of the following conditions and requirements:

(a) The Borrower shall have delivered to the Administrative Agent the following in form and substance satisfactory to the Administrative Agent:

(i) duly executed counterparts of this Agreement signed by the New Lender, the Decreasing Lender, the Borrower, the Guarantors and the Administrative Agent;

(ii) a duly executed New Note payable to the New Lender;

(iii) a certificate of the Secretary or Assistant Secretary of the Borrower and each Guarantor, certifying to and attaching the resolutions adopted by the board of directors (or similar governing body) of such party approving or consenting to the Specified Commitment Increase;

(iv) all conditions precedent to the Specified Commitment Increase set forth in Section 2.14(a) of the Credit Agreement shall have been satisfied;

(v) a certificate of the Chief Financial Officer or another Responsible Officer of the Borrower, certifying that (x) as of the Effective Date, all representations and warranties of the Borrower and the Guarantors contained in this Agreement, the Credit Agreement and the other Loan Documents are true and correct (except to the extent any such representation or warranty is expressly stated to have been made as of a specific date, in which case such representation or warranty is true and correct as of such date), (y) immediately after giving effect to the Specified Commitment Increase (including any Borrowings in connection therewith and the application of the proceeds thereof), the Borrower is in compliance with the covenants contained in Article V of the Credit Agreement, and (z) no Default or Event of Default has occurred and is continuing, both immediately before and after giving effect to the Specified Commitment Increase (including any Borrowings in connection therewith and the application of the proceeds thereof); and

(vi) such other documents or items that the Administrative Agent, the New Lender or their respective counsel may request.

(b) The Borrower shall have paid in connection with the Specified Commitment Increase such fees in such amounts as are separately agreed between the Borrower and the New Lender, and the Borrower and the Administrative Agent.

(c) The Borrower shall have paid to the Administrative Agent, upon application with appropriate documentation, all reasonable costs and expenses of the Administrative

Agent, including reasonable fees, charges and disbursements of counsel for the Administrative Agent, incurred in connection with this Agreement and the transactions contemplated herein.

SECTION 7. Representations and Warranties. The Borrower and the Guarantors hereby represent and warrant to the Administrative Agent and the New Lender as follows:

(a) No Default or Event of Default under the Credit Agreement or any other Loan Document has occurred and is continuing on the date hereof, or shall result from the Specified Commitment Increase.

(b) The Borrower and the Guarantors have the power and authority to enter into this Agreement and issue the New Note and to do all acts and things as are required or contemplated hereunder or thereunder to be done, observed and performed by them.

(c) Each of this Agreement and the New Note has been duly authorized, validly executed and delivered by one or more authorized officers of the Borrower (in the case of this Agreement and the New Note) and the Guarantors (in the case of this Agreement). Each of this Agreement and the New Note constitutes the legal, valid and binding obligations of the Borrower and the Guarantors enforceable against them in accordance with their respective terms.

(d) The execution and delivery of each of this Agreement and the New Note and the performance by the Borrower and the Guarantors hereunder and thereunder do not and will not require the consent or approval of any regulatory authority or governmental authority or agency having jurisdiction over the Borrower, or any Guarantor, nor be in contravention of or in conflict with the articles of incorporation, bylaws or other organizational documents of the Borrower, or any Guarantor that is a corporation, the articles of organization or operating agreement of any Guarantor that is a limited liability company, or the provision of any statute, or any judgment, order or indenture, instrument, agreement or undertaking, to which any Borrower, or any Guarantor is party or by which the assets or properties of the Borrower and the Guarantors are or may become bound.

SECTION 8. Effect of Agreement. On the Effective Date, this Agreement shall have the effects set forth in Section 2.14(e) of the Credit Agreement and the New Lender and the Administrative Agent shall make such payments and adjustments among the Lenders as are contemplated thereby such that each Lender’s Advances remain consistent with their pro rata percentage of the Revolver Commitments after giving effect to the Specified Commitment Increase.

SECTION 9. No Other Amendment. Except for the supplements set forth in this Agreement, the text of the Credit Agreement shall remain unchanged and in full force and effect. On and after the Effective Date, all references to the Credit Agreement in each of the Loan Documents shall hereafter mean the Credit Agreement, as supplemented by this Agreement. This Agreement is not intended to effect, nor shall it be construed as, a novation. The Credit Agreement and this Agreement shall be construed together as a single agreement. This Agreement shall constitute a Loan Document under the terms of the Credit Agreement. Nothing herein contained

shall waive, annul, vary or affect any provision, condition, covenant or agreement contained in the Credit Agreement, except as herein expressly agreed, nor affect or impair any rights, powers or remedies under the Credit Agreement as hereby supplemented. The Administrative Agent hereby reserves all of its rights and remedies against all parties who may be or may hereafter become secondarily liable for the repayment of the Obligations. The Borrower and the Guarantors promise and agree to perform all of the requirements, conditions, agreements and obligations under the terms of the Credit Agreement as hereby supplemented, such obligations under the Credit Agreement, as supplemented, the Collateral Documents and the other Loan Documents being hereby acknowledged, ratified and reaffirmed by the Borrower and the Guarantors. The Borrower and the Guarantors hereby expressly agree that the Credit Agreement, as supplemented, the Collateral Documents and the other Loan Documents are in full force and effect and hereby expressly reaffirm all Liens granted by the Borrower and the Guarantors under the Loan Documents.

SECTION 10. Counterparts. This Agreement may be executed in multiple counterparts, each of which shall be deemed to be an original and all of which, taken together, shall constitute one and the same agreement. Delivery of an executed counterpart of a signature page of this Agreement by telecopy or electronic means (including pdf) shall be effective as delivery of a manually executed counterpart of this Agreement.

SECTION 11. Governing Law. This Agreement shall be construed in accordance with and governed by the laws of the State of North Carolina.

SECTION 12. Further Assurances. The Loan Parties agree to promptly take such action, upon the request of the Administrative Agent, as is necessary to carry out the intent of this Agreement.

SECTION 13. Consent by Guarantors. The Guarantors consent to the foregoing amendments. The Guarantors promise and agree to perform all of the requirements, conditions, agreements and obligations under the terms of the Credit Agreement, as hereby supplemented, the Collateral Documents and the other Loan Documents to which they are party, said Credit Agreement, as hereby supplemented, the Collateral Documents and such other Loan Documents being hereby acknowledged, ratified and reaffirmed. In furtherance and not in limitation of the foregoing, the Guarantors acknowledge and agree that the Guaranteed Obligations (as defined in the Credit Agreement) include, without limitation, the indebtedness, liabilities and obligations evidenced by the New Note and the Advances made under the Credit Agreement as hereby supplemented.

SECTION 14. Severability. Any provision of this Agreement that is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective only to the extent of such prohibition or unenforceability without invalidating the remainder of such provision or the remaining provisions hereof or thereof or affecting the validity or enforceability of such provision in any other jurisdiction.

SECTION 15. Notices. All notices, requests and other communications to any party to the Loan Documents, as supplemented hereby, shall be given in accordance with the terms of Section 9.01 of the Credit Agreement.

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IN WITNESS WHEREOF, the parties hereto have executed and delivered, or have caused their respective duly authorized officers and representatives to execute and deliver, this Agreement as of the day and year first above written.


NEW LENDER:

SUMITOMO MITSUI BANKING CORPORATION


By:	/S/ SHANE KLEIN	(SEAL)
Name:	Shane Klein
Title:	Managing Director

[SIGNATURE PAGE TO SUPPLEMENT AGREEMENT (SMBC)]


DECREASING LENDER:

FIRST FINANCIAL BANK, N.A.


By:	/S/ MARELYN SHEDD	(SEAL)
Name:	Marelyn Shedd
Title:	President – Abilene Region

[SIGNATURE PAGE TO SUPPLEMENT AGREEMENT (SMBC)]


BORROWER:

MAIN STREET CAPITAL CORPORATION


By:	/S/ BRENT D. SMITH		(SEAL)
Name:	Brent D. Smith
Title:	Chief Financial Officer and Treasurer


GUARANTORS:

MAIN STREET CAPITAL PARTNERS, LLC


By:	/S/ BRENT D. SMITH		(SEAL)
Name:	Brent D. Smith
Title:	Chief Financial Officer and Treasurer

MAIN STREET EQUITY INTERESTS, INC.


By:	/S/ BRENT D. SMITH		(SEAL)
Name:	Brent D. Smith
Title:	Chief Financial Officer and Treasurer

MS INTERNATIONAL HOLDINGS, INC.


By:	/S/ BRENT D. SMITH		(SEAL)
Name:	Brent D. Smith
Title:	Chief Financial Officer and Treasurer


MAIN STREET CA LENDING, LLC


By:	/S/ BRENT D. SMITH	(SEAL)
Name:	Brent D. Smith
Title:	Chief Financial Officer and Treasurer

[SIGNATURE PAGE TO SUPPLEMENT AGREEMENT (SMBC)]


TRUIST BANK,
as Administrative Agent


By:	/S/ HAYS WOOD	(SEAL)
Name:	Hays Wood
Title:	Director

[SIGNATURE PAGE TO SUPPLEMENT AGREEMENT (SMBC)]

Exhibit A

Schedule 2.01

Revolver Commitments


Lender	Revolver Commitment
Truist Bank	$130,000,000
Frost Bank	$75,000,000
Royal Bank of Canada	$55,000,000
Sumitomo Mitsui Banking Corporation	$55,000,000
Hancock Whitney Bank	$50,000,000
ZB, N.A. dba Amegy Bank	$50,000,000
Texas Capital Bank, N.A.	$40,000,000
Cadence Bank, N.A.	$35,000,000
Trustmark National Bank	$35,000,000
BancorpSouth Bank	$35,000,000
Comerica Bank	$30,000,000
Raymond James Bank, N.A.	$30,000,000
BOKF, NA dba Bank of Texas	$25,000,000
Woodforest National Bank	$25,000,000
City National Bank	$25,000,000
Veritex Community Bank	$25,000,000
First National Bank of Pennsylvania	$25,000,000
Mutual of Omaha Bank	$25,000,000
First Financial Bank, N.A.	$10,000,000
Total	$780,000,000

Exhibit 31.1

I, Dwayne L. Hyzak, certify that:

1. I have reviewed this quarterly report on Form 10-Q for the quarterly period ended September 30, 2020 of Main Street Capital Corporation (the “registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated this November 6, 2020.


By:	/s/ DWAYNE L. HYZAK
	Dwayne L. Hyzak
	Chief Executive Officer

Exhibit 31.2

I, Brent D. Smith, certify that:

1. I have reviewed this quarterly report on Form 10-Q for the quarterly period ended September 30, 2020 of Main Street Capital Corporation (the “registrant”);

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated this November 6, 2020.

By:	/s/ BRENT D. SMITH
	Brent D. Smith
	Chief Financial Officer and Treasurer

Exhibit 32.1

Certification of Chief Executive Officer

Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350)

In connection with the Quarterly Report of Main Street Capital Corporation (the “Registrant”) on Form 10-Q for the quarter ended September 30, 2020 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, Dwayne L. Hyzak, the Chief Executive Officer of the Registrant, hereby certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.


	/s/ DWAYNE L. HYZAK
	Name:	Dwayne L. Hyzak
	Date:	November 6, 2020

Exhibit 32.2

Certification of Chief Financial Officer

Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350)

In connection with the Quarterly Report of Main Street Capital Corporation (the “Registrant”) on Form 10-Q for the quarter ended September 30, 2020 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, Brent D. Smith, the Chief Financial Officer of the Registrant, hereby certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.


	/s/ BRENT D. SMITH
	Name:	Brent D. Smith
	Date:	November 6, 2020