MainStreet Bancshares, Inc. (MNSB) — Institutional Holders, Q2 2026
97 institutional investment managers reported a MNSB position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $99.3M. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
MNSB in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- BlackRockAdded · +56,429 sh+$1.4M
- ACADIAN ASSET MANAGEMENTAdded · +49,269 sh+$1.2M
- AMERICAN CENTURY COMPANIESAdded · +49,060 sh+$1.2M
- DIMENSIONAL FUND ADVISORSAdded · +38,381 sh+$947.6K
- CITADEL ADVISORSAdded · +34,826 sh+$859.9K
Biggest sellers
- FourthstoneTrimmed · -337,370 sh-$8.3M
- ALLIANCEBERNSTEIN L.P.Trimmed · -136,330 sh-$3.4M
- UBS Group AGTrimmed · -80,076 sh-$2.0M
- VANGUARD CAPITAL MANAGEMENTTrimmed · -39,021 sh-$963.4K
- FIRST MANHATTANTrimmed · -26,377 sh-$651.2K
MNSB 13F holders ranked 1–97 of 97
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | BANC FUNDS#1 · 545,679 sh | 545,679 | $13.5M | 2.23% | +2.8% |
| 2 | BlackRock#2 · 404,037 sh | 404,037 | $10.0M | <0.01% | +16.2% |
| 3 | ALLIANCEBERNSTEIN L.P.#3 · 418,393 sh | 418,393 | $9.3M | <0.01% | -24.6% |
| 4 | WELLINGTON MANAGEMENT GROUP LLP#4 · 336,961 sh | 336,961 | $8.3M | <0.01% | -4.5% |
| 5 | VANGUARD CAPITAL MANAGEMENT#5 · 262,466 sh | 262,466 | $6.5M | <0.01% | -12.9% |
| 6 | DIMENSIONAL FUND ADVISORS#6 · 205,014 sh | 205,014 | $5.1M | <0.01% | +23.0% |
| 7 | ACADIAN ASSET MANAGEMENT#7 · 183,245 sh | 183,245 | $4.5M | <0.01% | +36.8% |
| 8 | FIRST MANHATTAN#8 · 161,731 sh | 161,731 | $4.0M | 0.01% | -14.0% |
| 9 | GEODE CAPITAL MANAGEMENT#9 · 152,196 sh | 152,196 | $3.8M | <0.01% | +3.4% |
| 10 | MARSHALL WACE, LLP#10 · 120,194 sh | 120,194 | $3.0M | <0.01% | +13.2% |
| 11 | STATE STREET#11 · 109,465 sh | 109,465 | $2.7M | <0.01% | +9.2% |
| 12 | AMERICAN CENTURY COMPANIES#12 · 101,604 sh | 101,604 | $2.5M | <0.01% | +93.4% |
| 13 | BRIDGEWAY CAPITAL MANAGEMENT#13 · 66,551 sh | 66,551 | $1.6M | 0.03% | +4.4% |
| 14 | Cresset Asset Management#14 · 59,040 sh | 59,040 | $1.5M | <0.01% | -18.0% |
| 15 | CITADEL ADVISORS#15 · 58,344 sh | 58,344 | $1.4M | <0.01% | +148.1% |
| 16 | NORTHERN#16 · 48,150 sh | 48,150 | $1.2M | <0.01% | +2.6% |
| 17 | Fourthstone#17 · 47,432 sh | 47,432 | $1.2M | 0.84% | -87.7% |
| 18 | VANGUARD PORTFOLIO MANAGEMENT#18 · 42,813 sh | 42,813 | $1.1M | 0.00% | +7.9% |
| 19 | Trexquant Investment#19 · 39,525 sh | 39,525 | $975.9K | <0.01% | +132.0% |
| 20 | VANGUARD FIDUCIARY#20 · 39,018 sh | 39,018 | $963.4K | <0.01% | +0.2% |
| 21 | Squarepoint Ops#21 · 37,233 sh | 37,233 | $919.3K | <0.01% | -26.8% |
| 22 | Empowered Funds#22 · 37,171 sh | 37,171 | $917.8K | <0.01% | +8.1% |
| 23 | UBS Group AG#23 · 33,102 sh | 33,102 | $817.3K | <0.01% | -70.8% |
| 24 | Connor, Clark & Lunn Investment Management Ltd.#24 · 30,385 sh | 30,385 | $750.2K | <0.01% | -8.1% |
| 25 | AQR CAPITAL MANAGEMENT#25 · 29,408 sh | 29,408 | $726.1K | <0.01% | New |
| 26 | STRS OHIO#26 · 26,100 sh | 26,100 | $644.4K | <0.01% | +5120.0% |
| 27 | MORGAN STANLEY#27 · 24,316 sh | 24,316 | $600.4K | 0.00% | -0.3% |
| 28 | HRT FINANCIAL#28 · 24,284 sh | 24,284 | $599.0K | <0.01% | New |
| 29 | MENDON CAPITAL ADVISORS#29 · 23,370 sh | 23,370 | $577.0K | 0.20% | -50.6% |
| 30 | GSA CAPITAL PARTNERS LLP#30 · 23,242 sh | 23,242 | $574.0K | 0.04% | New |
| 31 | Creative Planning#31 · 22,793 sh | 22,793 | $562.8K | <0.01% | +2.3% |
| 32 | R Squared Ltd#32 · 20,799 sh | 20,799 | $513.5K | 0.27% | New |
| 33 | CHARLES SCHWAB INVESTMENT MANAGEMENT#33 · 19,444 sh | 19,444 | $480.1K | <0.01% | +9.2% |
| 34 | Nuveen#34 · 17,867 sh | 17,867 | $441.1K | <0.01% | +95.0% |
| 35 | Daytona Street Capital#35 · 18,000 sh | 18,000 | $433.0K | — | 0.0% |
| 36 | Bank of New York Mellon#36 · 17,416 sh | 17,416 | $430.0K | <0.01% | +3.5% |
| 37 | TWO SIGMA INVESTMENTS#37 · 16,699 sh | 16,699 | $412.3K | <0.01% | New |
| 38 | BARCLAYS PLC#38 · 15,862 sh | 15,862 | $391.6K | <0.01% | -3.9% |
| 39 | LOS ANGELES CAPITAL MANAGEMENT#39 · 14,401 sh | 14,401 | $355.6K | <0.01% | New |
| 40 | XTX Topco Ltd#40 · 13,868 sh | 13,868 | $342.4K | <0.01% | +37.2% |
| 41 | HighTower Advisors#41 · 13,495 sh | 13,495 | $333.2K | <0.01% | +0.5% |
| 42 | Union Bankshares#42 · 12,600 sh | 12,600 | $311.1K | <0.01% | 0.0% |
| 43 | RENAISSANCE TECHNOLOGIES#43 · 11,000 sh | 11,000 | $271.6K | <0.01% | -23.6% |
| 44 | GOLDMAN SACHS GROUP#44 · 10,628 sh | 10,628 | $262.4K | 0.00% | -17.1% |
| 45 | Point72 Asset Management, L.P.#45 · 10,488 sh | 10,488 | $258.9K | <0.01% | New |
| 46 | ELCO Management#46 · 10,221 sh | 10,221 | $252.4K | — | -54.2% |
| 47 | SEI INVESTMENTS#47 · 9,915 sh | 9,915 | $244.8K | <0.01% | New |
| 48 | Russell Investments Group, Ltd.#48 · 9,843 sh | 9,843 | $242.8K | <0.01% | +1166.8% |
| 49 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#49 · 9,732 sh | 9,732 | $240.3K | <0.01% | 0.0% |
| 50 | Quadrature Capital Ltd#50 · 9,707 sh | 9,707 | $239.7K | <0.01% | New |
| 51 | OCCUDO QUANTITATIVE STRATEGIES#51 · 8,970 sh | 8,970 | $221.5K | 0.01% | New |
| 52 | CALDWELL SUTTER CAPITAL#52 · 8,818 sh | 8,818 | $217.7K | 0.08% | 0.0% |
| 53 | BNP PARIBAS FINANCIAL MARKETS#53 · 7,432 sh | 7,432 | $183.5K | <0.01% | +166.7% |
| 54 | OSAIC#54 · 6,709 sh | 6,709 | $165.6K | <0.01% | 0.0% |
| 55 | Spire Wealth Management#55 · 6,257 sh | 6,257 | $154.5K | <0.01% | -4.6% |
| 56 | RHUMBLINE ADVISERS#56 · 5,518 sh | 5,518 | $136.2K | <0.01% | +7.9% |
| 57 | Hughes Financial Services#57 · 5,440 sh | 5,440 | $134.3K | 0.02% | 0.0% |
| 58 | WELLS FARGO & COMPANY#58 · 5,302 sh | 5,302 | $130.9K | 0.00% | +105.3% |
| 59 | DEUTSCHE BANK AG\#59 · 5,201 sh | 5,201 | $128.4K | 0.00% | +3.5% |
| 60 | NEW YORK STATE COMMON RETIREMENT FUND#60 · 3,484 sh | 3,484 | $86.0K | <0.01% | 0.0% |
| 61 | CITIGROUP#61 · 2,921 sh | 2,921 | $72.1K | 0.00% | +812.8% |
| 62 | MIRAE ASSET GLOBAL ETFS Ltd.#62 · 2,916 sh | 2,916 | $72.0K | <0.01% | -13.1% |
| 63 | JPMORGAN CHASE#63 · 2,912 sh | 2,912 | $71.8K | 0.00% | +1.3% |
| 64 | Cassaday & Wealth Management#64 · 2,730 sh | 2,730 | $67.4K | <0.01% | 0.0% |
| 65 | Vanguard Global Advisers#65 · 2,563 sh | 2,563 | $63.3K | 0.00% | 0.0% |
| 66 | Police & Firemen's Retirement System of New Jersey#66 · 1,763 sh | 1,763 | $43.5K | <0.01% | 0.0% |
| 67 | Mirae Asset Global Investments , Ltd.#67 · 1,190 sh | 1,190 | $29.4K | 0.00% | New |
| 68 | Steward Partners Investment Advisory#68 · 1,050 sh | 1,050 | $25.9K | <0.01% | 0.0% |
| 69 | FMR#69 · 953 sh | 953 | $23.5K | 0.00% | +101.9% |
| 70 | FIRST UNITED BANK#70 · 790 sh | 790 | $19.5K | — | 0.0% |
| 71 | ROYAL BANK OF CANADA#71 · 779 sh | 779 | $19.0K | 0.00% | +41.6% |
| 72 | Ameritas Investment Partners#72 · 718 sh | 718 | $17.7K | <0.01% | 0.0% |
| 73 | Legal & General Group Plc#73 · 636 sh | 636 | $15.7K | 0.00% | 0.0% |
| 74 | Tower Research Capital (TRC)#74 · 619 sh | 619 | $15.3K | <0.01% | -43.4% |
| 75 | State of Alaska, Department of Revenue#75 · 596 sh | 596 | $14.0K | — | 0.0% |
| 76 | Rockefeller Capital Management L.P.#76 · 558 sh | 558 | $13.8K | 0.00% | +0.4% |
| 77 | TOTH FINANCIAL ADVISORY#77 · 545 sh | 545 | $13.4K | — | +0.6% |
| 78 | FEDERATED HERMES#78 · 482 sh | 482 | $11.9K | 0.00% | +5.9% |
| 79 | PNC FINANCIAL SERVICES GROUP#79 · 170 sh | 170 | $4.2K | 0.00% | +553.8% |
| 80 | SRS Capital Advisors#80 · 138 sh | 138 | $3.4K | 0.00% | +4500.0% |
| 81 | GAMMA Investing#81 · 124 sh | 124 | $3.1K | — | +327.6% |
| 82 | Allworth Financial#82 · 121 sh | 121 | $3.0K | 0.00% | +706.7% |
| 83 | Sterling Capital Management#83 · 121 sh | 121 | $3.0K | — | -45.7% |
| 84 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#84 · 88 sh | 88 | $2.2K | 0.00% | 0.0% |
| 85 | SBI Securities , Ltd.#85 · 83 sh | 83 | $2.0K | — | 0.0% |
| 86 | Integrated Wealth Concepts#86 · 83 sh | 83 | $2.0K | 0.00% | New |
| 87 | IFP Advisors#87 · 57 sh | 57 | $1.4K | — | +2750.0% |
| 88 | ROTHSCHILD INVESTMENT#88 · 24 sh | 24 | $593.00 | 0.00% | +380.0% |
| 89 | Basecamp Wealth Advisors#89 · 18 sh | 18 | $444.00 | <0.01% | +28.6% |
| 90 | EverSource Wealth Advisors#90 · 17 sh | 17 | $419.00 | 0.00% | New |
| 91 | Farther Finance Advisors#91 · 15 sh | 15 | $370.00 | — | -84.0% |
| 92 | True Wealth Design#92 · 7 sh | 7 | $173.00 | — | New |
| 93 | Essential Partners#93 · 7 sh | 7 | $173.00 | — | +75.0% |
| 94 | Wealth Enhancement Services#94 · 3 sh | 3 | $74.00 | — | New |
| 95 | SJS Investment Consulting#95 · 1 sh | 1 | $25.00 | — | New |
| 96 | Covestor Ltd#96 · 14 sh | 14 | $0.00 | 0.00% | New |
| 97 | CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM#97 · 87 sh | 87 | — | — | -77.2% |
Funds that sold out of MNSB in Q2 2026 (3)
Held MNSB at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| US BANCORP \DE\1,000 sh | 1,000 | $22.2K |
| MAI Capital Management10 sh | 10 | $222.00 |
| Root Financial Partners7 sh | 7 | $155.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.