Mainstreet Bancshares, Inc.: which funds bought and sold

Institutions that bought and sold Mainstreet Bancshares shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 58 institutions that filed 13F reports for both quarters added to or opened positions in Mainstreet Bancshares, and 23 cut or closed them. Together they sold a net 163K shares, −3.9% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 58K shares (+3.7%); index fund managers were net buyers of 38K shares (+3.6%). 16 opened a new position and 3 sold out entirely.

Bought, Q2 2026 58 institutions, 16 of them new holders Sold, Q2 2026 23 institutions, 3 of them sold out

Net change, all compared −163K shares (−3.9%)

Net change, active managers +58K shares (+3.7%), 13 bought, 5 sold

Buyers versus sellers

institutions compared, 98

58 bought 17 23 sold

Active managers and hedge funds 13 bought · 5 sold · +58K

Index fund managers 8 bought · 1 sold · +38K

Other institutions 37 bought · 17 sold · −259K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	+56K +16.2%	404K	$10M
Acadian Asset Management LLC Active manager	+49K +36.8%	183K	$4.5M
American Century Companies Inc Active manager	+49K +93.4%	102K	$2.5M
Dimensional Fund Advisors LP	+38K +23.0%	205K	$5.1M
Citadel Advisors LLC Hedge fund	+35K +148.1%	58K	$1.4M
AQR Capital Management LLC Hedge fund	+29K New position	29K	$726,083
Strs Ohio	+26K +5120.0%	26K	$644,409
HRT Financial LP	+24K New position	24K	$599,000
Gsa Capital Partners LLP	+23K New position	23K	$574,000
Trexquant Investment LP Hedge fund	+22K +132.0%	40K	$975,872
R Squared Ltd	+21K New position	21K	$513,528
Two Sigma Investments, LP Hedge fund	+17K New position	17K	$412,298
Banc Funds Co LLC	+15K +2.8%	546K	$13.5M
Los Angeles Capital Management LLC Active manager	+14K New position	14K	$355,561
Marshall Wace, LLP Hedge fund	+14K +13.2%	120K	$3M
Point72 Asset Management, L.P. Hedge fund	+10K New position	10K	$258,949
Sei Investments Co	+9,915 New position	9,915	$244,803
Quadrature Capital Ltd Hedge fund	+9,707 New position	9,707	$239,666
State Street Corp Index funds	+9,254 +9.2%	109K	$2.7M
Russell Investments Group, Ltd.	+9,066 +1166.8%	9,843	$242,784

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Acadian Asset Management LLC Active manager	+49K +36.8%	183K	$4.5M
American Century Companies Inc Active manager	+49K +93.4%	102K	$2.5M
Citadel Advisors LLC Hedge fund	+35K +148.1%	58K	$1.4M
AQR Capital Management LLC Hedge fund	+29K New position	29K	$726,083
Trexquant Investment LP Hedge fund	+22K +132.0%	40K	$975,872
Two Sigma Investments, LP Hedge fund	+17K New position	17K	$412,298
Los Angeles Capital Management LLC Active manager	+14K New position	14K	$355,561
Marshall Wace, LLP Hedge fund	+14K +13.2%	120K	$3M
Point72 Asset Management, L.P. Hedge fund	+10K New position	10K	$258,949
Quadrature Capital Ltd Hedge fund	+9,707 New position	9,707	$239,666

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Fourthstone LLC	−337K −87.7%	47K	$1.2M
Alliancebernstein L.P. Active manager	−136K −24.6%	418K	$9.3M
UBS Group AG	−80K −70.8%	33K	$817,288
Vanguard Capital Management LLC Index funds	−39K −12.9%	262K	$6.5M
First Manhattan Co. Llc. Active manager	−26K −14.0%	162K	$4M
Mendon Capital Advisors Corp	−24K −50.6%	23K	$577,005
Wellington Management Group LLP Active manager	−16K −4.5%	337K	$8.3M
Squarepoint Ops LLC Hedge fund	−14K −26.8%	37K	$919,283
Cresset Asset Management, LLC	−13K −18.0%	59K	$1.5M
Renaissance Technologies LLC Hedge fund	−3,400 −23.6%	11K	$271,590
Connor, Clark & Lunn Investment Management Ltd.	−2,671 −8.1%	30K	$750,206
Goldman Sachs Group Inc	−2,199 −17.1%	11K	$262,405
Us Bancorp	−1,000 Sold out	0	—
Barclays PLC	−651 −3.9%	16K	$391,634
Tower Research Capital LLC (TRC)	−475 −43.4%	619	$15,283
Mirae Asset Global Etfs Holdings Ltd.	−441 −13.1%	2,916	$71,996
Spire Wealth Management	−305 −4.6%	6,257	$154,485
California State Teachers Retirement System	−294 −77.2%	87	$2,148
Sterling Capital Management LLC	−102 −45.7%	121	$2,987
Farther Finance Advisors, LLC	−79 −84.0%	15	$370

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Alliancebernstein L.P. Active manager	−136K −24.6%	418K	$9.3M
First Manhattan Co. Llc. Active manager	−26K −14.0%	162K	$4M
Wellington Management Group LLP Active manager	−16K −4.5%	337K	$8.3M
Squarepoint Ops LLC Hedge fund	−14K −26.8%	37K	$919,283
Renaissance Technologies LLC Hedge fund	−3,400 −23.6%	11K	$271,590

New positions

largest by value

Institution	Shares	Value June 30, 2026
AQR Capital Management LLCHedge fund	29K	$726,083
HRT Financial LP	24K	$599,000
Gsa Capital Partners LLP	23K	$574,000
R Squared Ltd	21K	$513,528
Two Sigma Investments, LPHedge fund	17K	$412,298
Los Angeles Capital Management LLCActive manager	14K	$355,561
Point72 Asset Management, L.P.Hedge fund	10K	$258,949
Sei Investments Co	9,915	$244,803
Quadrature Capital LtdHedge fund	9,707	$239,666
Occudo Quantitative Strategies LP	8,970	$221,469

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Us Bancorp	1,000	$22,200
Mai Capital Management	10	$222
Root Financial Partners, LLC	7	$155

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 95
Ten largest holders: 68.8%
Index fund managers: 26.7%
Active managers and hedge funds: 40.1%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	13	5	5	0	+58K	+3.7%
Index fund managers	8	1	0	0	+38K	+3.6%
Other institutions	37	17	11	3	−259K	−16.1%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Mainstreet Bancshares.

Only managers that filed a holdings report for both quarters are compared (98 here). 1 other holder is left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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