MNSB · MainStreet Bancshares, Inc. · Shareholders & Ownership

$24.68 +0.88 (+3.70%)

Russell 2000 member Rebalance outlook locked

Market Cap

$169.48M

7.12M

Volume · Oct 22 97.07K Avg daily vol (3M) 30.98K

Every disclosed holder of MNSB in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns MNSB

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	97	4,071,267	57.17%	Yes
Insiders (Forms 3, 4, 5)	15	691,819	9.72%	Yes
13D/G-only blocks	1	383,763	5.39%	Yes
Remaining	—	1,974,227	27.72%	Rest
Registered funds (N-PORT, not summed)	105	1,142,883	16.05%	No

Shares outstanding: 7,121,076, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of MNSB

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	BANC FUNDS CO LLC 13F CIK 1029311 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	545,679	7.66%	+14,738	Jun 30, 2026	carried, not yet filed for the newest quarter
2	ALLIANCEBERNSTEIN L.P. 13F CIK 1109448 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	418,393	5.88%	-136,330	Jun 30, 2026	carried, not yet filed for the newest quarter
2.1	ALLIANCEBERNSTEIN L.P. 13G CIK 1109448 · Registered investment adviser · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	418,393	5.88%	-136,330	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
3	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	404,037	5.67%	+56,429	Jun 30, 2026	carried, not yet filed for the newest quarter
3.1	BlackRock, Inc. 13G CIK 2012383 · Holding company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	396,555	5.57%	—	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
3.2	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	172,381	2.42%	+26,207	Jun 30, 2026	iShares Trust, not summed
3.3	iShares Russell 2000 Value ETF Fund S000004342 · Registered fund · Jun 30, 2026 iShares Trust, not summed	68,289	0.96%	+12,253	Jun 30, 2026	iShares Trust, not summed
3.4	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	22,189	0.31%	+4,952	Jun 30, 2026	iShares Trust, not summed
3.5	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	12,185	0.17%	0	Jun 30, 2026	Quantitative Master Series LLC, not summed
4	MainStreet Bank 401(k) Retirement Plan 13G CIK 2113205 · Unknown · Dec 31, 2025 Rule 13d-1(b), qualified institution	383,763	5.39%	—	Dec 31, 2025	Rule 13d-1(b), qualified institution
5	WELLINGTON MANAGEMENT GROUP LLP 13F CIK 902219 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	336,961	4.73%	-15,745	Jun 30, 2026	carried, not yet filed for the newest quarter
6	DICK JEFF W Insider CIK 1774665 · Feb 20, 2026 Director, Chairman, President and CEO, issuer-wide	270,817	3.80%	+20,930	Feb 20, 2026	Director, Chairman, President and CEO, issuer-wide
7	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	262,466	3.69%	-39,021	Jun 30, 2026	carried, not yet filed for the newest quarter
8	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	205,014	2.88%	+38,381	Jun 30, 2026	carried, not yet filed for the newest quarter
8.1	U.S. SMALL CAP VALUE PORTFOLIO Fund S000000987 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	53,405	0.75%	+6,022	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
8.2	Dimensional US Small Cap Value ETF Fund S000075151 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	28,948	0.41%	+9,720	Jul 31, 2026	Dimensional ETF Trust, not summed
8.3	U.S. SMALL CAP PORTFOLIO Fund S000000971 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	24,823	0.35%	+452	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
8.4	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	23,277	0.33%	0	Jul 31, 2026	Dimensional ETF Trust, not summed
8.5	U.S. Targeted Value Portfolio Fund S000000970 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	15,557	0.22%	+1,315	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
9	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	192,048	2.70%	-37,784	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
10	ACADIAN ASSET MANAGEMENT LLC 13F CIK 916542 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	183,245	2.57%	+49,269	Jun 30, 2026	carried, not yet filed for the newest quarter
11	FIRST MANHATTAN CO. LLC. 13F CIK 728083 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	161,731	2.27%	-26,377	Jun 30, 2026	carried, not yet filed for the newest quarter
12	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	152,196	2.14%	+5,028	Jun 30, 2026	carried, not yet filed for the newest quarter
13	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	120,194	1.69%	+13,969	Jun 30, 2026	carried, not yet filed for the newest quarter
14	CHMELIK THOMAS J Insider CIK 1774482 · Feb 20, 2026 Director, Senior EVP, issuer-wide	117,756	1.65%	-2,799	Feb 20, 2026	Director, Senior EVP, issuer-wide
15	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	109,465	1.54%	+9,254	Jun 30, 2026	carried, not yet filed for the newest quarter
15.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	2,400	0.03%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
15.2	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	163	0.00%	0	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
16	AMERICAN CENTURY COMPANIES INC 13F CIK 748054 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	101,604	1.43%	+49,060	Jun 30, 2026	carried, not yet filed for the newest quarter
17	Brockett Charles C. Insider CIK 1629138 · Nov 24, 2025 Director, issuer-wide	93,942	1.32%	—	Nov 24, 2025	Director, issuer-wide
18	Avantis U.S. Small Cap Value ETF Fund S000066459 · Registered fund · May 31, 2026 American Century ETF Trust, not summed	72,102	1.01%	+34,164	May 31, 2026	American Century ETF Trust, not summed
19	BRIDGEWAY CAPITAL MANAGEMENT, LLC 13F CIK 1107261 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	66,551	0.93%	+2,775	Jun 30, 2026	carried, not yet filed for the newest quarter
19.1	Omni Small-Cap Value Fund Fund S000033567 · Registered fund · Jun 30, 2026 Bridgeway Funds, Inc., not summed	20,380	0.29%	0	Jun 30, 2026	Bridgeway Funds, Inc., not summed
19.2	Ultra-Small Company Fund Fund S000004423 · Registered fund · Jun 30, 2026 Bridgeway Funds, Inc., not summed	9,000	0.13%	0	Jun 30, 2026	Bridgeway Funds, Inc., not summed
20	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	63,120	0.89%	-237	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
21	Cresset Asset Management, LLC 13F CIK 1761013 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	59,040	0.83%	-12,960	Jun 30, 2026	carried, not yet filed for the newest quarter
22	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	58,344	0.82%	+34,826	Jun 30, 2026	carried, not yet filed for the newest quarter
23	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	48,150	0.68%	+1,215	Jun 30, 2026	carried, not yet filed for the newest quarter
23.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	3,265	0.05%	0	Jun 30, 2026	Northern Funds, not summed
24	Fourthstone LLC 13F CIK 1767803 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	47,432	0.67%	-337,370	Jun 30, 2026	carried, not yet filed for the newest quarter
24.1	Fourthstone LLC 13G CIK 1767803 · Registered investment adviser · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	47,432	0.67%	-337,370	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
25	Hersiburane Abdulhamid Insider CIK 1818494 · Feb 20, 2026 President, MainSteet Bank, issuer-wide	44,659	0.63%	-6,672	Feb 20, 2026	President, MainSteet Bank, issuer-wide
26	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	42,813	0.60%	+3,152	Jun 30, 2026	carried, not yet filed for the newest quarter
27	Vari Richard Alexander Insider CIK 1788697 · Jun 4, 2026 Chief Financial Officer, issuer-wide	39,914	0.56%	+2,655	Jun 4, 2026	Chief Financial Officer, issuer-wide
28	Trexquant Investment LP 13F CIK 1633445 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	39,525	0.56%	+22,486	Jun 30, 2026	carried, not yet filed for the newest quarter
29	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	39,018	0.55%	+67	Jun 30, 2026	carried, not yet filed for the newest quarter
30	Squarepoint Ops LLC 13F CIK 1642575 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	37,233	0.52%	-13,641	Jun 30, 2026	carried, not yet filed for the newest quarter
31	Empowered Funds, LLC 13F CIK 1592828 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	37,171	0.52%	+2,775	Jun 30, 2026	carried, not yet filed for the newest quarter
31.1	EA Bridgeway Omni Small-Cap Value ETF Fund S000078089 · Registered fund · Jun 30, 2026 EA Series Trust, not summed	37,171	0.52%	+2,775	Jun 30, 2026	EA Series Trust, not summed
32	GREEN DARRELL Insider CIK 1775101 · Jul 1, 2026 Director, issuer-wide	35,556	0.50%	+851	Jul 1, 2026	Director, issuer-wide
33	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · May 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	34,945	0.49%	+253	May 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
34	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	33,102	0.46%	-80,076	Jun 30, 2026	carried, not yet filed for the newest quarter
35	Connor, Clark & Lunn Investment Management Ltd. 13F CIK 1596800 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	30,385	0.43%	-2,671	Jun 30, 2026	carried, not yet filed for the newest quarter
36	AQR CAPITAL MANAGEMENT LLC 13F CIK 1167557 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	29,408	0.41%	+29,408	Jun 30, 2026	carried, not yet filed for the newest quarter
37	RUST PATSY I Insider CIK 1774659 · Apr 3, 2026 Director, issuer-wide	28,630	0.40%	+534	Apr 3, 2026	Director, issuer-wide
38	STRS OHIO 13F CIK 820478 · Pension or benefit plan · Jun 30, 2026 carried, not yet filed for the newest quarter	26,100	0.37%	+25,600	Jun 30, 2026	carried, not yet filed for the newest quarter
39	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	24,316	0.34%	-64	Jun 30, 2026	carried, not yet filed for the newest quarter
40	HRT FINANCIAL LP 13F CIK 1475597 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	24,284	0.34%	+24,284	Jun 30, 2026	carried, not yet filed for the newest quarter
41	MENDON CAPITAL ADVISORS CORP 13F CIK 1177043 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	23,370	0.33%	-23,942	Jun 30, 2026	carried, not yet filed for the newest quarter
42	GSA CAPITAL PARTNERS LLP 13F CIK 1362033 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	23,242	0.33%	+23,242	Jun 30, 2026	carried, not yet filed for the newest quarter
43	Creative Planning 13F CIK 1540235 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	22,793	0.32%	+523	Jun 30, 2026	carried, not yet filed for the newest quarter
44	R Squared Ltd 13F CIK 1896148 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	20,799	0.29%	+20,799	Jun 30, 2026	carried, not yet filed for the newest quarter
45	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	19,444	0.27%	+1,643	Jun 30, 2026	carried, not yet filed for the newest quarter
45.1	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	16,444	0.23%	+1,643	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
45.2	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	3,000	0.04%	0	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
46	Daytona Street Capital LLC 13F CIK 2101936 · Unknown · Sep 30, 2026	18,000	0.25%	0	Sep 30, 2026
47	Nuveen, LLC 13F CIK 1871926 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	17,867	0.25%	+8,706	Jun 30, 2026	carried, not yet filed for the newest quarter
47.1	Nuveen Small Cap Blend Index Fund Fund S000005367 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	9,161	0.13%	0	Jul 31, 2026	TIAA-CREF Funds, not summed
48	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	17,416	0.24%	+590	Jun 30, 2026	carried, not yet filed for the newest quarter
49	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	16,699	0.23%	+16,699	Jun 30, 2026	carried, not yet filed for the newest quarter
50	AUER GROWTH Fund S000020493 · Registered fund · May 31, 2026 Unified Series Trust, not summed	16,000	0.22%	0	May 31, 2026	Unified Series Trust, not summed

17 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 172 holders

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Key facts CIK 1693577 CUSIP 56064Y100 13F (30d) 12 filings 12 filers Visit website Investor relations