MainStreet Bancshares, Inc. (MNSB) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

8,254,438Shares Outstanding

799,525Shares held by institutions

$17,813,417Value of institutional holdings

46.14%Institutional ownership %

16.62%Shares Changed QoQ

50No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

MainStreet Bancshares, Inc. (NASDAQ:MNSB) currently has 53 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

The percentage of MainStreet Bancshares owned by institutions changed from 60.9% in September 2025 to 38.7% in December 2025, marking a slight down trend.
Institutional share ownership changed by 8.25% QoQ, while the number of institutional owners saw no change YoY.
The latest 13F cycle for MainStreet Bancshares reveals that of 53 total investors, 25 funds grew their exposure, whereas 15 reduced theirs and 13 made no changes.
The aggregate institutional position in MainStreet Bancshares now stands at 2.91Mn shares as of December 2025, after investors increased their holdings (up by 221.64K shares quarter on quarter which is down 967.86K shares year over year).
Fourthstone LLC's holding of 767.79K shares as of December 31, 2025 makes it the primary institutional investor in MainStreet Bancshares, owning 10.22% of the stock.
Among the most significant buyers of MainStreet Bancshares during December 2025 were Fourthstone LLC (257.86K), Squarepoint Ops LLC (34.42K), MARSHALL WACE, LLP (31.83K), DIMENSIONAL FUND ADVISORS LP (19.22K), Daytona Street Capital LLC (18.00K).
Leading sellers of MainStreet Bancshares stock in December 2025 included BANC FUNDS CO LLC (151.39K), UBS Group AG (21.14K), GOLDMAN SACHS GROUP INC (15.28K), Bank of New York Mellon Corp (6.30K), GEODE CAPITAL MANAGEMENT, LLC (2.80K).
The top 10 institutional holders of MainStreet Bancshares for the quarter ending December 2025 included Fourthstone LLC (767.79K), BANC FUNDS CO LLC (421.98K), VANGUARD GROUP INC (379.28K), BlackRock, Inc. (350.34K), GEODE CAPITAL MANAGEMENT, LLC (149.97K), DIMENSIONAL FUND ADVISORS LP (138.35K), UBS Group AG (113.68K), ACADIAN ASSET MANAGEMENT LLC (97.03K), STATE STREET CORP (73.56K), RENAISSANCE TECHNOLOGIES LLC (49.00K).

53 Institutional Holders

799,525 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
Fourthstone LLC	31 Dec, 2025	767,792	257,859	50.57%	$15,632,245.00
BANC FUNDS CO LLC	31 Dec, 2025	421,981	-151,392	-26.40%	$8,591,533.00
VANGUARD GROUP INC	31 Dec, 2025	379,278	-1,014	-0.27%	$7,722,101.00
BlackRock, Inc.	31 Dec, 2025	350,338	17,115	5.14%	$7,132,882.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	149,969	-2,803	-1.83%	$3,053,709.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	138,351	19,224	16.14%	$2,816,878.00
UBS Group AG	31 Dec, 2025	113,676	-21,145	-15.68%	$2,314,443.00
ACADIAN ASSET MANAGEMENT LLC	31 Dec, 2025	97,034	11,125	12.95%	$1,971.00
STATE STREET CORP	31 Dec, 2025	73,562	582	0.80%	$1,497,722.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	49,000	-388	-0.79%	$997,640.00
MARSHALL WACE, LLP	31 Dec, 2025	44,287	31,833	255.60%	$901,683.00
Squarepoint Ops LLC	31 Dec, 2025	34,424	34,424	0.00%	$700,873.00
Empowered Funds, LLC	31 Dec, 2025	31,362	2,755	9.63%	$638,530.00
Connor, Clark & Lunn Investment Management Ltd.	31 Dec, 2025	26,971	9,067	50.64%	$549,130.00
MORGAN STANLEY	31 Dec, 2025	26,465	1,066	4.20%	$538,828.00
BARCLAYS PLC	31 Dec, 2025	26,048	3,707	16.59%	$530,338.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	20,565	0	0.00%	$418,703.00
Bank of New York Mellon Corp	31 Dec, 2025	18,039	-6,298	-25.88%	$367,275.00
Daytona Street Capital LLC	31 Dec, 2025	18,000	18,000	0.00%	$366,480.00
Atlantic Union Bankshares Corp	31 Dec, 2025	12,600	0	0.00%	$256,536.00

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