Mainstreet BancsharesMNSB
13F holders, Q1 2026 (March 31)84holders +9
11new positions
5sold out
2famous investors
$21.96avg. 13F price*
At the end of Q1 2026, 84 institutions reported holding Mainstreet Bancshares Inc. (MNSB) in their 13F filings, up 9 from Q4 2025. 11 opened new positions and 5 sold out. The largest holders were Banc Funds Co. LLC ($11.8M), Alliancebernstein L.P. ($11.3M) and Fourthstone LLC ($8.5M). 2 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Mainstreet Bancshares Inc.
- CUSIP
- 56064Y100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 11 | $1.7M |
| Exits | 5 | $515K |
All 13F filers, Q4 2025 → Q1 2026: 376,681 shares bought and 890,173 shares sold, net −513,492 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 84 holders
| Banc Funds Co. LLC | 2.19% | Add +25.8% | 530,941 | $11.8M |
| Alliancebernstein L.P. | 0.00% | Reduce -19.0% | 554,723 | $11.3M |
| Fourthstone LLC | 1.45% | Reduce -49.9% | 384,802 | $8.5M |
| Wellington Management Group LLP | 0.00% | Reduce -1.9% | 352,706 | $7.8M |
| BlackRock, Inc. | 0.00% | Reduce -0.8% | 347,608 | $7.7M |
| Vanguard Capital Management LLC | 0.00% | — | 301,487 | $6.7M |
| First Manhattan Co. Llc. | 0.01% | No change | 188,108 | $4.2M |
| Dimensional Fund Advisors LP | 0.00% | Add +20.4% | 166,633 | $3.7M |
| Geode Capital Management, LLC | 0.00% | Reduce -1.9% | 147,168 | $3.3M |
| Acadian Asset Management LLC | 0.00% | Add +38.1% | 133,976 | $3.0M |
| UBS Group AG | 0.00% | Reduce -0.4% | 113,178 | $2.5M |
| Marshall Wace, LLP | 0.00% | Add +139.9% | 106,225 | $2.4M |
| State Street Corp. | 0.00% | Add +36.2% | 100,211 | $2.2M |
| Cresset Asset Management, LLC | 0.01% | Reduce -78.4% | 72,000 | $1.6M |
| Bridgeway Capital Management, LLC | 0.03% | Add +5.0% | 63,776 | $1.4M |
| American Century Companies Inc. | 0.00% | New | 52,544 | $1.2M |
| Squarepoint Ops LLC | 0.00% | Add +47.8% | 50,874 | $1.1M |
| Mendon Capital Advisors Corp. | 0.41% | No change | 47,312 | $1.1M |
| Northern Trust Corp. | 0.00% | Reduce -3.2% | 46,935 | $1.0M |
| Vanguard Portfolio Management LLC | 0.00% | — | 39,661 | $880K |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 38,951 | $865K |
| Empowered Funds, LLC | 0.00% | Add +9.7% | 34,396 | $764K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Add +22.6% | 33,056 | $734K |
| Morgan Stanley | 0.00% | Reduce -7.9% | 24,380 | $541K |
| Citadel Advisors | 0.00% | Reduce -40.1% | 23,518 | $522K |
| ELCO Management Co., LLC | 0.24% | No change | 22,312 | $495K |
| Creative Planning | 0.00% | Add +0.8% | 22,270 | $494K |
| Daytona Street Capital LLC | 0.31% | No change | 18,000 | $405K |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -13.4% | 17,801 | $395K |
| Trexquant Investment LP | 0.00% | Add +45.0% | 17,039 | $378K |
| Bank of New York Mellon Corp | 0.00% | Reduce -6.7% | 16,826 | $374K |
| Barclays PLC | 0.00% | Reduce -36.6% | 16,513 | $367K |
| Renaissance Technologies | 0.00% | Reduce -70.6% | 14,400 | $320K |
| HighTower Advisors, LLC | 0.00% | Add +9.2% | 13,428 | $298K |
| Goldman Sachs Group Inc. | 0.00% | Add +12.9% | 12,827 | $285K |
| Atlantic Union Bankshares Corp | 0.01% | No change | 12,600 | $280K |
| XTX Topco Ltd | 0.00% | New | 10,110 | $224K |
| Arrowstreet Capital, Limited Partnership | 0.00% | Reduce -15.1% | 9,732 | $216K |
| Nuveen, LLC | 0.00% | New | 9,161 | $203K |
| Caldwell Sutter Capital, Inc. | 0.08% | No change | 8,818 | $196K |
| Osaic Holdings, Inc. | 0.00% | No change | 6,709 | $149K |
| Spire Wealth Management | 0.01% | No change | 6,562 | $146K |
| Hughes Financial Services, LLC | 0.02% | No change | 5,440 | $121K |
| Rhumbline Advisers | 0.00% | Reduce -2.7% | 5,116 | $114K |
| Deutsche Bank AG | 0.00% | No change | 5,026 | $112K |
| New York State Common Retirement Fund | 0.00% | No change | 3,484 | $77K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +2.1% | 3,357 | $75K |
| JPMorgan Chase & Co. | 0.00% | Reduce -39.9% | 2,875 | $63K |
| BNP Paribas Financial Markets | 0.00% | Add +63.0% | 2,787 | $62K |
| Cassaday & Co Wealth Management LLC | 0.00% | New | 2,730 | $61K |
| Wells Fargo & Company | 0.00% | Reduce -67.2% | 2,582 | $57K |
| Vanguard Global Advisers, LLC | 0.00% | — | 2,563 | $57K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 1,763 | $39K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +98.2% | 1,094 | $24K |
| Steward Partners Investment Advisory, LLC | 0.00% | No change | 1,050 | $23K |
| US Bancorp \de | 0.00% | No change | 1,000 | $22K |
| First United Bank & Trust | 0.01% | No change | 790 | $18K |
| Russell Investments Group, Ltd. | 0.00% | Add +16.5% | 777 | $17K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 718 | $16K |
| Legal & General Group Plc | 0.00% | No change | 636 | $14K |
| State of Alaska, Department of Revenue | 0.00% | No change | 596 | $13K |
| Royal Bank of Canada | 0.00% | Reduce -54.5% | 550 | $13K |
| Rockefeller Capital Management L.P. | 0.00% | Add +0.5% | 556 | $12K |
| Toth Financial Advisory Corp. | 0.00% | Add +0.4% | 542 | $12K |
| STRS Ohio | 0.00% | New | 500 | $11K |
| FMR LLC | 0.00% | Add +3.1% | 472 | $10K |
| Federated Hermes, Inc. | 0.00% | Reduce -39.1% | 455 | $10K |
| California State Teachers Retirement System | 0.00% | Reduce -11.8% | 381 | $8K |
| Citigroup Inc. | 0.00% | Add +100.0% | 320 | $7K |
| Sterling Capital Management LLC | 0.00% | Reduce -42.2% | 223 | $5K |
| Cwm, LLC | 0.00% | Add +58.7% | 173 | $4K |
| Farther Finance Advisors, LLC | 0.00% | No change | 94 | $2K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | New | 88 | $2K |
| SBI Securities Co., Ltd. | 0.00% | No change | 83 | $2K |
| GAMMA Investing LLC | 0.00% | New | 29 | $644 |
| PNC Financial Services Group, Inc. | 0.00% | Add +62.5% | 26 | $577 |
| Allworth Financial LP | 0.00% | New | 15 | $333 |
| Basecamp Wealth Advisors LLC | 0.00% | New | 14 | $311 |
| MAI Capital Management | 0.00% | Add +100.0% | 10 | $222 |
| Root Financial Partners, LLC | 0.00% | New | 7 | $155 |
| Rothschild Investment LLC | 0.00% | Add +400.0% | 5 | $111 |
| Essential Partners LLC | 0.00% | No change | 4 | $89 |
| Arax Advisory Partners | 0.00% | New | 3 | $67 |
| IFP Advisors, Inc | 0.00% | Reduce -33.3% | 2 | $44 |
"% of holder's portfolio" is MNSB's weight in each manager's 13F, not the share of Mainstreet Bancshares Inc. the manager owns.