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Winchester Bancorp (WSBK) Institutional Ownership

Winchester Bancorp logo
$13.00 +0.03 (+0.23%)
Closing price 08/14/2026 04:00 PM Eastern
Extended Trading
$12.99 -0.01 (-0.08%)
As of 08/14/2026 07:34 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Winchester Bancorp (NASDAQ:WSBK)

Number of
Institutional Buyers
(last 12 months)
10
Total
Institutional Inflows
(last 12 months)
$2.72M
Number of
Institutional Sellers
(last 12 months)
4
Total
Institutional Outflows
(last 12 months)
$1.78M
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WSBK Institutional Buying and Selling by Quarter

Winchester Bancorp Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
8/7/2026 BlackRock Inc.14,202$187K0.0%N/A0.153%
8/6/2026 Northstar Financial Companies Inc.70,000$920K0.6%N/A0.753%
7/1/2026 Eastern Bank4,000$53K0.0%+60.0%0.043%
5/14/2026 Renaissance Technologies LLC31,000$394K0.0%+17.0%0.333%
4/28/2026 M3F Inc.24,586$312K0.1%-82.9%0.264%
2/18/2026Millennium Management LLC16,082$168K0.0%-15.1%0.173%
2/13/2026 Integrated Wealth Concepts LLC57,000$596K0.0%+3.6%0.613%
2/12/2026 Renaissance Technologies LLC26,502$277K0.0%N/A0.285%
2/12/2026 Steward Partners Investment Advisory LLC19,127$200K0.0%+77.9%0.206%
2/9/2026 Geode Capital Management LLC26,502$277K0.0%+10.9%0.285%
2/9/2026 M3 Wealth Management LLC70,000$732K0.6%N/A0.753%
11/17/2025Millennium Management LLC18,947$182K0.0%-18.6%0.204%
11/17/2025Citadel Advisors LLC26,438$254K0.0%-36.9%0.284%
11/14/2025Mangrove Partners IM LLC186,949$1.79M0.1%+10.6%2.010%
11/12/2025 M3F Inc.82,552$788K0.2%+39.2%0.888%
10/7/2025 Lynch & Associates IN13,183$126K0.0%-27.5%0.142%
8/15/2025Bank of America Corp DE10,211$91K0.0%N/A0.110%
8/14/2025Raymond James Financial Inc.20,000$179K0.0%N/A0.215%
8/13/2025 M3F Inc.59,323$531K0.1%N/A0.638%
8/8/2025 EagleClaw Capital Managment LLC16,000$143K0.0%N/A0.172%
8/8/2025 Geode Capital Management LLC20,992$188K0.0%N/A0.226%
7/30/2025 Benin Management CORP10,500$94K0.0%N/A0.113%


WSBK Institutional Ownership - Frequently Asked Questions

During the previous two years, 17 institutional investors and hedge funds held shares of Winchester Bancorp. The most heavily invested institutionals were Mangrove Partners IM LLC ($1.79M), Northstar Financial Companies Inc. ($920K), M3 Wealth Management LLC ($732K), Integrated Wealth Concepts LLC ($596K), Renaissance Technologies LLC ($394K), M3F Inc. ($312K), and Geode Capital Management LLC ($277K).Learn more on Winchester Bancorp's institutional investors.

Of the 14 institutional investors that purchased Winchester Bancorp's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: M3F Inc. ($82.55K), Northstar Financial Companies Inc. ($70K), M3 Wealth Management LLC ($70K), Renaissance Technologies LLC ($31K), Geode Capital Management LLC ($23.60K), Raymond James Financial Inc. ($20K), and Mangrove Partners IM LLC ($17.85K).

Institutional investors have bought a total of 240,765 shares in the last 24 months. This purchase volume represents approximately $2.72M in transactions.

The following institutional investors have sold Winchester Bancorp stock in the last 24 months: M3F Inc. ($119.40K), Citadel Advisors LLC ($15.49K), Millennium Management LLC ($7.19K), and Lynch & Associates IN ($5K).

Institutional investors have sold a total of 147,080 shares in the last 24 months. This volume of shares sold represents approximately $1.78M in transactions.


Related Companies

Institutional ownership data for NASDAQ:WSBK is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 8/7/2026. New 13F filings are added each quarter as they're published.
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