Winchester Bancorp Ownership | Who Owns Winchester Bancorp?

Winchester Bancorp Ownership Summary

Winchester Bancorp is owned by 4.48% institutional investors, 59.26% insiders, and 36.26% retail investors. Mangrove partners is the largest institutional shareholder, holding 2.08% of WSBK shares. Vanguard Morn Total Stk Mkt Idx Investor is the top mutual fund, with 1.47% of its assets in Winchester Bancorp shares.

WSBK Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Winchester Bancorp	4.48%	59.26%	36.26%
Sector	Financial Services Stocks	746.79%	13.83%	-660.62%
Industry	Regional Banks Stocks	38.12%	12.89%	48.99%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Mangrove partners	186.20K	2.08%	$2.45M
Vanguard capital management	178.94K	1.99%	$2.35M
Integrated wealth concepts	82.00K	0.91%	$1.08M
Northstar financial companies	70.00K	0.78%	$919.80K
Oppenheimer & close	50.00K	0.56%	$657.00K
Renaissance	31.40K	0.35%	$412.60K
Geode capital management	29.04K	0.32%	$381.81K
Alliancebernstein	24.66K	0.27%	$313.13K
Vanguard fiduciary trust	22.71K	0.25%	$298.38K
Raymond james financial	20.00K	0.22%	$262.80K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Northstar financial companies	70.00K	0.62%	$919.80K
Oppenheimer & close	50.00K	0.41%	$657.00K
Mangrove partners	186.20K	0.16%	$2.45M
Sachetta	8.00K	0.05%	$105.12K
Rfg - bristol wealth advisors	10.16K	0.03%	$133.48K
Eagleclaw capital managment	16.00K	0.03%	$210.24K
Integrated wealth concepts	82.00K	0.01%	$1.08M
Steward partners investment advisory	19.13K	0.00%	$251.33K
Eastern bank	4.00K	0.00%	$52.56K
Renaissance	31.40K	0.00%	$412.60K

Top Buyers

Holder	Shares	% Assets	Change
Integrated wealth concepts	82.00K	0.01%	25.00K
Geode capital management	29.04K	-	15.12K
Blackrock funding, inc. /de	14.20K	-	14.20K
Rfg - bristol wealth advisors	10.16K	0.03%	10.16K
Sachetta	8.00K	0.05%	8.00K

Top Sellers

Holder	Shares	% Assets	Change
M3f	-	-	-24.59K
Citadel advisors	-	-	-21.00K
Millennium management	-	-	-11.54K
Morgan stanley	-	-	-4.00K
Vanguard capital management	178.94K	0.00%	-2.57K

New Positions

Holder	Shares	% Assets	Change	Value
Blackrock funding, inc. /de	14.20K	-	14.20K	$186.61K
Rfg - bristol wealth advisors	10.16K	0.03%	10.16K	$133.48K
Sachetta	8.00K	0.05%	8.00K	$105.12K
Royal bank of canada	2.00K	-	2.00K	$26.00K
Advisor group	16.00	-	16.00	$210.00

Sold Out

Holder	Change
Citigroup	-1.00
Morgan stanley	-4.00K
Millennium management	-11.54K
Citadel advisors	-21.00K
M3f	-24.59K

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	10	-54.55%	401,917	-52.23%	4	5.09%	3	-66.67%	1	-80.00%
Dec 31, 2025	22	-	841,277	18.78%	9	15.03%	9	-	5	-28.57%
Sep 30, 2025	22	22.22%	708,264	14.19%	7	17.56%	9	-50.00%	7	-
Jun 30, 2025	18	-	620,236	-	6	-	18	-	-	-

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Morn Total Stk Mkt Idx Investor	132.14K	1.47%	-
Vanguard Total Stock Mkt Idx Inv	132.14K	1.47%	-
Vanguard Institutional Extnd Mkt Idx Tr	44.53K	0.50%	-
Fidelity Extended Market Index	15.45K	0.17%	15.45K
iShares Micro-Cap ETF	13.18K	0.15%	-176.00
Fidelity Series Total Market Index	6.07K	0.07%	-337.00
Spartan Extended Market Index Pool F	3.91K	0.04%	-
NT Ext Equity Mkt Index Fund - Lending	3.69K	0.04%	-
Northern Trust Extended Eq Market Idx	3.69K	0.04%	-
NT Ext Equity Mkt Index Fund - NL	3.58K	0.04%	1.47K

Recent Insider Transactions

Date	Name	Role	Activity	Value
May 26, 2026	Merritt Edward J	-	Buy	$11.68K
May 21, 2026	Carroll John A	President & CEO	Buy	$637.50
May 07, 2026	Snow John Ingalls III	-	Buy	$2.55K
May 07, 2026	Snow John Ingalls III	-	Buy	$19.50K
May 05, 2026	Snow John Ingalls III	-	Buy	$78.64K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	6	-
2025 Q2	1	-

WSBK Ownership FAQ

Who Owns Winchester Bancorp?

Winchester Bancorp shareholders are primarily institutional investors at 4.48%, followed by 59.26% insiders and 36.26% retail investors. The average institutional ownership in Winchester Bancorp's industry, Regional Banks Stocks, is 38.12%, which Winchester Bancorp falls below.

Who owns the most shares of Winchester Bancorp?

Winchester Bancorp’s largest shareholders are Mangrove partners (186.2K shares, 2.08%), Vanguard capital management (178.94K shares, 1.99%), and Integrated wealth concepts (82K shares, 0.91%). Together, they hold 4.98% of Winchester Bancorp’s total shares outstanding.

Does Blackrock own Winchester Bancorp?

BlackRock is not among the top 10 institutional shareholders of Winchester Bancorp.

Who is Winchester Bancorp’s biggest shareholder by percentage of total assets invested?

Northstar financial companies is Winchester Bancorp’s biggest shareholder by percentage of total assets invested, with 0.62% of its assets in 70K Winchester Bancorp shares, valued at 919.8K$.

Who is the top mutual fund holder of Winchester Bancorp shares?

Vanguard Morn Total Stk Mkt Idx Investor is the top mutual fund holder of Winchester Bancorp shares, with 1.47% of its total shares outstanding invested in 132.14K Winchester Bancorp shares.

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