MNSB Institutional Ownership & Shareholders
MAINSTREET BANCSHARES INC (MNSB) is currently held by 96 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $99.92M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Banc Funds Co Llc is currently the largest disclosed institutional shareholder of MNSB tracked by InsiderSet, reporting ownership valued at approximately $13.47M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $11.62M, representing an estimated loss of -13.73% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 68% of the total disclosed MNSB value among the investors covered in this analysis. Major shareholders include Banc Funds Co Llc, Blackrock, Inc., Alliancebernstein L.P., and several other long-term asset managers with concentrated positions in MAINSTREET BANCSHARES INC (MNSB).
This page ranks the largest institutional MNSB shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
96
Total Reported Value
$99.92M
Largest Holder
Banc Funds Co Llc
Largest Position
$13.47M
Insider Transactions (90d)
2
Latest Filing Quarter
Q2 2026
New Institutional Positions
107
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Banc Funds Co Llc | 2.23% | 545,679 | $13,472,815 | $11,622,963 | -$1,849,852 | -13.73% | |
| Blackrock, Inc. | 0.00% | 404,037 | $9,975,675 | $8,605,988 | -$1,369,687 | -13.73% | |
| Alliancebernstein L.P. | 0.00% | 418,393 | $9,288,325 | $8,911,771 | -$376,554 | -4.05% | |
| Wellington Management Group Llp | 0.00% | 336,961 | $8,319,567 | $7,177,269 | -$1,142,298 | -13.73% | |
| Vanguard Capital Management Llc | 0.00% | 262,466 | $6,480,286 | $5,590,526 | -$889,760 | -13.73% | |
| Dimensional Fund Advisors Lp | 0.00% | 205,014 | $5,061,763 | $4,366,798 | -$694,965 | -13.73% | |
| Acadian Asset Management Llc | 0.01% | 183,245 | $4,518,000 | $3,903,119 | -$614,882 | -13.61% | |
| First Manhattan Co. Llc. | 0.01% | 161,731 | $3,993,138 | $3,444,870 | -$548,268 | -13.73% | |
| Geode Capital Management, Llc | 0.00% | 152,196 | $3,758,183 | $3,241,775 | -$516,408 | -13.74% | |
| Marshall Wace, Llp | 0.00% | 120,194 | $2,967,589 | $2,560,132 | -$407,457 | -13.73% | |
| State Street Corp | 0.00% | 109,465 | $2,702,691 | $2,331,605 | -$371,087 | -13.73% | |
| American Century Companies Inc | 0.00% | 101,604 | $2,508,603 | $2,164,165 | -$344,438 | -13.73% | |
| Bridgeway Capital Management, Llc | 0.03% | 66,551 | $1,643,144 | $1,417,536 | -$225,608 | -13.73% | |
| Cresset Asset Management, Llc | 0.01% | 59,040 | $1,457,697 | $1,257,552 | -$200,145 | -13.73% | |
| Citadel Advisors Llc | 0.00% | 58,344 | $1,440,513 | $1,242,727 | -$197,786 | -13.73% | |
| Northern Trust Corp | 0.00% | 48,150 | $1,188,824 | $1,025,595 | -$163,229 | -13.73% | |
| Fourthstone Llc | 0.84% | 47,432 | $1,185,994 | $1,010,302 | -$175,692 | -14.81% | |
| Vanguard Portfolio Management Llc | 0.00% | 42,813 | $1,057,053 | $911,917 | -$145,136 | -13.73% | |
| Trexquant Investment Lp | 0.01% | 39,525 | $975,872 | $841,883 | -$133,990 | -13.73% | |
| Vanguard Fiduciary Trust Co | 0.00% | 39,018 | $963,354 | $831,083 | -$132,271 | -13.73% | |
| Squarepoint Ops Llc | 0.00% | 37,233 | $919,283 | $793,063 | -$126,220 | -13.73% | |
| Empowered Funds, Llc | 0.00% | 37,171 | $917,752 | $791,742 | -$126,010 | -13.73% | |
| Strs Ohio | 0.00% | 34,200 | $846,108 | $728,460 | -$117,648 | -13.90% | |
| Ubs Group Ag | 0.00% | 33,102 | $817,288 | $705,073 | -$112,215 | -13.73% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 30,385 | $750,206 | $647,201 | -$103,006 | -13.73% | |
| Aqr Capital Management Llc | 0.00% | 29,408 | $726,083 | $626,390 | -$99,693 | -13.73% | |
| Morgan Stanley | 0.00% | 24,316 | $600,377 | $517,931 | -$82,446 | -13.73% | |
| Hrt Financial Lp | 0.00% | 24,284 | $599,000 | $517,249 | -$81,751 | -13.65% | |
| Mendon Capital Advisors Corp | 0.20% | 23,370 | $577,005 | $497,781 | -$79,224 | -13.73% | |
| Gsa Capital Partners Llp | 0.04% | 23,242 | $574,000 | $495,055 | -$78,945 | -13.75% | |
| R Squared Ltd | 0.27% | 20,799 | $513,528 | $443,019 | -$70,509 | -13.73% | |
| Charles Schwab Investment Management Inc | 0.00% | 19,444 | $480,072 | $414,157 | -$65,915 | -13.73% | |
| Daytona Street Capital Llc | 0.32% | 18,000 | $453,060 | $383,400 | -$69,660 | -15.38% | |
| Nuveen, Llc | 0.00% | 17,867 | $441,136 | $380,567 | -$60,569 | -13.73% | |
| Bank Of New York Mellon Corp | 0.00% | 17,416 | $430,008 | $370,961 | -$59,047 | -13.73% | |
| Two Sigma Investments, Lp | 0.00% | 16,699 | $412,298 | $355,689 | -$56,609 | -13.73% | |
| Barclays Plc | 0.00% | 15,862 | $391,634 | $337,861 | -$53,773 | -13.73% | |
| Los Angeles Capital Management Llc | 0.00% | 14,401 | $355,561 | $306,741 | -$48,820 | -13.73% | |
| Xtx Topco Ltd | 0.00% | 13,868 | $342,401 | $295,388 | -$47,013 | -13.73% | |
| Atlantic Union Bankshares Corp | 0.01% | 12,600 | $311,094 | $268,380 | -$42,714 | -13.73% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 11,000 | $271,590 | $234,300 | -$37,290 | -13.73% |
| Goldman Sachs Group Inc | 0.00% | 10,628 | $262,405 | $226,376 | -$36,029 | -13.73% | |
| Point72 Asset Management, L.P. | 0.00% | 10,488 | $258,949 | $223,394 | -$35,555 | -13.73% | |
| Elco Management Co., Llc | 0.12% | 10,221 | $252,868 | $217,707 | -$35,161 | -13.90% | |
| Sei Investments Co | 0.00% | 9,915 | $244,803 | $211,190 | -$33,614 | -13.73% | |
| Russell Investments Group, Ltd. | 0.00% | 9,843 | $242,784 | $209,656 | -$33,128 | -13.65% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 9,732 | $240,283 | $207,292 | -$32,991 | -13.73% | |
| Quadrature Capital Ltd | 0.00% | 9,707 | $239,666 | $206,759 | -$32,907 | -13.73% | |
| Occudo Quantitative Strategies Lp | 0.01% | 8,970 | $221,469 | $191,061 | -$30,408 | -13.73% | |
| Caldwell Sutter Capital, Inc. | 0.08% | 8,818 | $217,716 | $187,823 | -$29,893 | -13.73% |
Frequently asked questions about MNSB
Who are the largest institutional holders of MNSB?
The largest institutional holders of MNSB reported in the latest SEC Form 13F filings include Banc Funds Co Llc, Blackrock, Inc., Alliancebernstein L.P., Wellington Management Group Llp, and Vanguard Capital Management Llc. InsiderSet ranks institutional holders by their latest reported MNSB position.
What is MNSB institutional ownership?
This page tracks MNSB positions reported by institutional investment managers through SEC Form 13F. MAINSTREET BANCSHARES INC (MNSB) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own MNSB?
InsiderSet currently tracks 96 institutional managers reporting MNSB holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of MNSB shareholders.
How much MNSB stock do institutions own?
Institutional investment managers disclosed approximately $99.92M in MNSB holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was MNSB institutional ownership last updated?
The latest MNSB institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional MNSB holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its MNSB position after the reporting date.
Are institutions buying or selling MNSB?
Institutional buying and selling can be analyzed by comparing MNSB positions across consecutive 13F reporting periods. InsiderSet's MNSB Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View MNSB ownership changes.
How has MNSB institutional ownership changed over time?
InsiderSet tracks MNSB institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.