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Companies / Financials / Winchester Bancorp, Inc.
WSBK

Winchester Bancorp, Inc.

FinancialsBanks & Brokers
Ticker WSBKWINCHESTER, MAFiscal year ends DecemberBook value per share $13.32Diluted shares 9.0M

Winchester Bancorp, Inc. (Nasdaq: WSBK) is the bank holding company for Winchester Savings Bank, a Massachusetts-chartered savings bank that gathers deposits and makes loans in eastern Massachusetts. Its lending includes one- to four-family residential mortgages, multifamily and commercial real estate loans,… From the company’s description.

In fiscal 2026, Winchester Bancorp, Inc. reported revenue of $26.26M, up 36.0% from fiscal 2025, and net income of $4.42M. Its pre-tax margin was 21.8%. Over the twelve months to Sep 30, 2026, revenue was $28.15M.

Fiscal year 2026 · ends 12-31Changes are against fiscal 2025The amber dot is the latest twelve months, to 2026-09-30
Sales & profitability
$26.26MFY2026
+36.0% year over year
Last 12 mo $28.15M
21.78%FY2026
+29.7 percentage points
Last 12 mo 21.51%
$4.42MFY2026
+605.8% year over year
Last 12 mo $4.73M
3.67%FY2026
+4.4 percentage points
Last 12 mo 3.95%
Cash & financing
$5.40MFY2026
+118.9% year over year
Last 12 mo $6.21M
$5.40MFY2026
+118.9% year over year
Last 12 mo $6.21M
8.03FY2026
Was 7.16× a year earlier
Last 12 mo 8.46
9.0MFY2026
−3.0% year over year
Last 12 mo 9.0M

Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.

What Winchester Bancorp, Inc. does

In the company’s own words

Winchester Bancorp, Inc. (Nasdaq: WSBK) is the bank holding company for Winchester Savings Bank, a Massachusetts-chartered savings bank that gathers deposits and makes loans in eastern Massachusetts. Its lending includes one- to four-family residential mortgages, multifamily and commercial real estate loans, construction loans, home equity loans and lines of credit, and smaller volumes of commercial business and consumer loans; it also invests in securities. Customers include local residents, households, property owners and small businesses. The Bank operates a main office and four full-service branches in the Boston-area communities of Winchester, Arlington, Danvers and Woburn. Winchester Savings Bank, chartered in 1871, is the company’s sole subsidiary; Winchester Bancorp was formed in 2024 and became the Bank’s holding company following a mutual holding company reorganization completed in 2025. At June 30, 2026, the company had $1.1 billion in assets and $809.2 million in deposits, and employed 71 full-time and eight part-time or seasonal employees. Its website is www.winchestersavings.com.

Company details
Sector
Financials
Industry (SIC)
Banks & Brokers
Headquarters
WINCHESTER, MA
Fiscal year end
December
CIK
2047235
SIC
6036

Financial performance, year by year

Fiscal 2025–2026 · USD
$-3.78M$4.93M$13.64M$22.35M$31.06M20252026Last 12 moLast 12 monthsLast 12 months

The full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.

Ownership

Who owns Winchester Bancorp, Inc. — and what changed

Funds as of 2026Q2 · superinvestors as of 2026-06-30

7
funds hold it
0 of 35
superinvestors hold it
$2.63M
held by funds, at market
2.2%
of shares held by funds

Largest fund holders · Winchester Bancorp, Inc.’s weight in each

VANGUARD TOTAL STOCK MARKET INDEX FUND
VTI · VANGUARD INDEX FUNDS
0.00%of fund net assets
VANGUARD EXTENDED MARKET INDEX FUND
VXF · VANGUARD INDEX FUNDS
0.00%of fund net assets
iShares Micro-Cap ETF
IWC · iShares Trust
0.01%of fund net assets
Fidelity Series Total Market Index Fund
FCFMX · Fidelity Concord Street Trust
—of fund net assets
VANGUARD BALANCED INDEX FUND
VBINX · VANGUARD VALLEY FORGE FUNDS
0.00%of fund net assets

Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.

Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.

Could not be determined for this company: bond issues.

Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.

Connected research

Put this business in context.

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  • “How do Winchester Bancorp, Inc. and its peers compare on margins and cash generation over ten years?”
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