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MNSB

MainStreet Bancshares, Inc.
$24.64 -0.45 (-1.79%) At close · Jul 2
Market Cap
$175.37M
Shares
7,117,438

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 83
Total Value: $93,230,014
Total Shares: 4,199,552

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 83 13F filers · Δ vs Dec 31, 2025
Top Holder
13.2%
Jun 2023 → Mar 2026 · range 13.2% – 17.6%
−3.0 pts
Top 5
51.7%
Jun 2023 → Mar 2026 · range 51.7% – 64.6%
−3.3 pts
Top 10
74.0%
Jun 2023 → Mar 2026 · range 74.0% – 83.4%
−5.4 pts
HHI
702
Jun 2023 → Mar 2026 · range 702 – 994
Broadly held−127

Quarterly Activity

vs Dec 31, 2025
New
14
Increased
25
Decreased
23
Sold Out
7
Unchanged
21
Holder count: +7
Institutional value: -10.8%
Shares held: -18.2%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Small BANC FUNDS CO LLC +108,960 530,941
Large MARSHALL WACE, LLP +61,938 106,225
Large ACADIAN ASSET MANAGEMENT LLC +36,942 133,976
Mega DIMENSIONAL FUND ADVISORS LP +28,282 166,633
Mega STATE STREET CORP +26,649 100,211

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Small Fourthstone LLC −382,990 384,802
Large Cresset Asset Management, LLC −261,136 72,000
Mega ALLIANCEBERNSTEIN L.P. −130,222 554,723
Large RENAISSANCE TECHNOLOGIES LLC −34,600 14,400
Mega CITADEL ADVISORS LLC −15,770 23,518

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 301,487 $6,693,011
Mega AMERICAN CENTURY COMPANIES INC 52,544 $1,166,476
Mega VANGUARD FIDUCIARY TRUST CO 38,951 $864,712
Mid XTX Topco Ltd 10,110 $224,442
Mega Nuveen, LLC 9,161 $203,374

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
— MainStreet Bank 401(k) Retirement Plan 383,763 $7,813,414
Mega VANGUARD GROUP INC 379,278 $7,722,098
Micro Provident Wealth Management, LLC 10,932 $222,575
Mega BANK OF AMERICA CORP /DE/ 8,110 $165,118
Large MetLife Investment Management, LLC 4,079 $83,048
Filter: New 14 Increased 25 Reduced 23 Sold out 7 Unchanged 21
Showing 83 of 83
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega ALLIANCEBERNSTEIN L.P. $12,314,850 13.21% 554,723
Small BANC FUNDS CO LLC $11,786,890 12.64% 530,941
Small Fourthstone LLC $8,542,604 9.16% 384,802
Mega WELLINGTON MANAGEMENT GROUP LLP $7,830,073 8.40% 352,706
Mega BlackRock, Inc. $7,716,896 8.28% 347,608
Mega VANGUARD CAPITAL MANAGEMENT LLC $6,693,011 7.18% 301,487
Large FIRST MANHATTAN CO. LLC. $4,175,997 4.48% 188,108
Mega DIMENSIONAL FUND ADVISORS LP $3,699,252 3.97% 166,633
Mega GEODE CAPITAL MANAGEMENT, LLC $3,267,129 3.50% 147,168
Large ACADIAN ASSET MANAGEMENT LLC $2,974,267 3.19% 133,976
Mega UBS Group AG $2,512,551 2.70% 113,178
Large MARSHALL WACE, LLP $2,358,194 2.53% 106,225
Mega STATE STREET CORP $2,224,684 2.39% 100,211
Large Cresset Asset Management, LLC $1,598,400 1.71% 72,000
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $1,415,827 1.52% 63,776
Mega AMERICAN CENTURY COMPANIES INC $1,166,476 1.25% 52,544
Large Squarepoint Ops LLC $1,129,402 1.21% 50,874
Small MENDON CAPITAL ADVISORS CORP $1,050,326 1.13% 47,312
Mega NORTHERN TRUST CORP Bank $1,041,956 1.12% 46,935
Mega VANGUARD FIDUCIARY TRUST CO Bank $864,712 0.93% 38,951
Large Empowered Funds, LLC $763,591 0.82% 34,396
Large Connor, Clark & Lunn Investment Management Ltd. $733,843 0.79% 33,056
Mega MORGAN STANLEY $541,233 0.58% 24,380
Mega CITADEL ADVISORS LLC $522,098 0.56% 23,518
Small ELCO Management Co., LLC $495,326 0.53% 22,312
Large Creative Planning $494,394 0.53% 22,270
Small Daytona Street Capital LLC $399,600 0.43% 18,000
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $395,182 0.42% 17,801
Large Trexquant Investment LP $378,265 0.41% 17,039
Mega Bank of New York Mellon Corp Bank $373,536 0.40% 16,826
Mega BARCLAYS PLC $366,588 0.39% 16,513
Large RENAISSANCE TECHNOLOGIES LLC $319,680 0.34% 14,400
Large HighTower Advisors, LLC $298,101 0.32% 13,428
Mega GOLDMAN SACHS GROUP INC $284,759 0.31% 12,827
Mid Atlantic Union Bankshares Corp $279,720 0.30% 12,600
Mid XTX Topco Ltd $224,442 0.24% 10,110
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $216,050 0.23% 9,732
Mega Nuveen, LLC $203,374 0.22% 9,161
Small CALDWELL SUTTER CAPITAL, INC. $195,759 0.21% 8,818
Large OSAIC HOLDINGS, INC. $148,939 0.16% 6,709
Mid Spire Wealth Management $145,676 0.16% 6,562
Micro Hughes Financial Services, LLC $120,768 0.13% 5,440
Mega RHUMBLINE ADVISERS $113,575 0.12% 5,116
Mega DEUTSCHE BANK AG\ Bank $111,577 0.12% 5,026
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $77,344 0.08% 3,484
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $74,525 0.08% 3,357
Mega JPMORGAN CHASE & CO $63,824 0.07% 2,875
Mega BNP PARIBAS ARBITRAGE, SA $61,871 0.07% 2,787
Small Cassaday & Co Wealth Management LLC $60,606 0.07% 2,730
Mega WELLS FARGO & COMPANY/MN $57,319 0.06% 2,582
Mega Vanguard Global Advisers, LLC $56,898 0.06% 2,563
Large Police & Firemen's Retirement System of New Jersey Pension $39,138 0.04% 1,763
Mid Tower Research Capital LLC (TRC) $24,286 0.03% 1,094
Large Steward Partners Investment Advisory, LLC $23,310 0.03% 1,050
Large US BANCORP \DE\ Bank $22,200 0.02% 1,000
Small FIRST UNITED BANK & TRUST Bank $17,538 0.02% 790
Large Russell Investments Group, Ltd. $17,248 0.02% 777
Mid Ameritas Investment Partners, Inc. $15,939 0.02% 718
Mega Legal & General Group Plc $14,119 0.02% 636
Mid State of Alaska, Department of Revenue $13,231 0.01% 596
Large Rockefeller Capital Management L.P. $12,343 0.01% 556
Mega ROYAL BANK OF CANADA Bank $12,210 0.01% 550
Small TOTH FINANCIAL ADVISORY CORP $12,032 0.01% 542
Large STRS OHIO $11,100 0.01% 500
Mega FMR LLC $10,478 0.01% 472
Large FEDERATED HERMES, INC. $10,101 0.01% 455
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $8,458 0.01% 381
Mega CITIGROUP INC $7,103 0.01% 320
Mid Sterling Capital Management LLC $4,950 0.01% 223
Large CWM, LLC $3,840 0.00% 173
Mid Farther Finance Advisors, LLC $2,086 0.00% 94
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $1,953 0.00% 88
Mid SBI Securities Co., Ltd. Broker-Dealer $1,842 0.00% 83
Mid GAMMA Investing LLC $643 0.00% 29
Mega PNC FINANCIAL SERVICES GROUP, INC. $577 0.00% 26
Mid Allworth Financial LP $333 0.00% 15
Small Basecamp Wealth Advisors LLC $310 0.00% 14
Mid MAI Capital Management $222 0.00% 10
Small Root Financial Partners, LLC $155 0.00% 7
Mid ROTHSCHILD INVESTMENT LLC $111 0.00% 5
Small Essential Partners LLC $88 0.00% 4
Mid Arax Advisory Partners $66 0.00% 3
Mid IFP Advisors, Inc $44 0.00% 2
Key facts CIK 1693577 CUSIP 56064Y100 13F (30d) 1 filings 1 filers Visit website Investor relations

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