Winchester Bancorp, Inc./MD/ SEC filings WSBK
Winchester Bancorp, Inc./MD/ has 66 filings in SEC EDGAR's recent list, going back to Dec 12, 2024. Its latest annual report, Form ARS, was filed on Sep 28, 2026 for the period ended Jun 30, 2026. The latest quarterly report (Form 10-Q) was filed on Nov 4, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 28, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| S-8 | Employee stock plan registration | Nov 4, 2026 | — |
| 10-Q | Quarterly report | Nov 4, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations
|
Oct 28, 2026 | Oct 28, 2026 |
| 8-K |
Current report
Other events
|
Sep 30, 2026 | Sep 30, 2026 |
| DEF 14A | Proxy statement | Sep 28, 2026 | Sep 28, 2026 |
| ARS | Annual report to shareholders | Sep 28, 2026 | Jun 30, 2026 |
| 10-K | Annual report | Sep 16, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations, Bylaw or fiscal year change
|
Jul 30, 2026 | Jul 30, 2026 |
| 4 | Insider transaction | May 27, 2026 | May 26, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 21, 2026 |
| 10-Q | Quarterly report | May 13, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | May 8, 2026 | May 7, 2026 |
| 4 | Insider transaction | May 6, 2026 | May 5, 2026 |
| 4 | Insider transaction | May 5, 2026 | May 1, 2026 |
| 8-K |
Current report
Results of operations
|
Apr 29, 2026 | Apr 29, 2026 |
| 10-Q | Quarterly report | Feb 11, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Jan 28, 2026 | Jan 28, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Nov 13, 2025 | Nov 12, 2025 |
| 10-Q | Quarterly report | Nov 12, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Oct 22, 2025 | Oct 22, 2025 |
| DEF 14A | Proxy statement | Oct 10, 2025 | Nov 12, 2025 |
| ARS | Annual report to shareholders | Oct 10, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Other events
|
Sep 17, 2025 | Sep 17, 2025 |
| 10-K | Annual report | Sep 17, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Jul 30, 2025 | Jul 30, 2025 |
| 4 | Insider transaction | Jun 10, 2025 | Jun 10, 2025 |
| 4 | Insider transaction | May 15, 2025 | May 14, 2025 |
| 3 | Initial insider ownership | May 14, 2025 | Apr 30, 2025 |
| SCHEDULE 13D | Ownership over 5% (active) | May 14, 2025 | — |
| 10-Q | Quarterly report | May 12, 2025 | Mar 31, 2025 |
| 4 | Insider transaction | May 9, 2025 | May 7, 2025 |
| 3 | Initial insider ownership | May 7, 2025 | Apr 30, 2025 |
| 3 | Initial insider ownership | May 7, 2025 | Apr 30, 2025 |
| 3 | Initial insider ownership | May 7, 2025 | Apr 30, 2025 |
| 8-K |
Current report
Other events
|
May 6, 2025 | Apr 30, 2025 |
| 4 | Insider transaction | May 6, 2025 | May 5, 2025 |
| CERT | Filing | May 1, 2025 | — |
| 3 | Initial insider ownership | Apr 30, 2025 | Apr 30, 2025 |
| 3 | Initial insider ownership | Apr 30, 2025 | Apr 30, 2025 |
| 3 | Initial insider ownership | Apr 30, 2025 | Apr 30, 2025 |
| 3 | Initial insider ownership | Apr 30, 2025 | Apr 30, 2025 |
| 3 | Initial insider ownership | Apr 30, 2025 | Apr 30, 2025 |
| 3 | Initial insider ownership | Apr 30, 2025 | Apr 30, 2025 |
| 3 | Initial insider ownership | Apr 30, 2025 | Apr 30, 2025 |
| 3 | Initial insider ownership | Apr 30, 2025 | Apr 30, 2025 |
| 3 | Initial insider ownership | Apr 30, 2025 | Apr 30, 2025 |
| 3 | Initial insider ownership | Apr 30, 2025 | Apr 30, 2025 |
| 3 | Initial insider ownership | Apr 30, 2025 | Apr 30, 2025 |
| 3 | Initial insider ownership | Apr 30, 2025 | Apr 30, 2025 |
| 8-A12B | Winchester bancorp, inc. form 8-a april 30, 2025 | Apr 30, 2025 | — |
| 8-K |
Current report
Results of operations
|
Apr 30, 2025 | Apr 30, 2025 |
| 8-K |
Current report
Other events
|
Apr 30, 2025 | Apr 29, 2025 |
| 10-Q | Quarterly report | Mar 27, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Other events
|
Mar 21, 2025 | Mar 21, 2025 |
| 8-K |
Current report
Other events
|
Mar 20, 2025 | Mar 20, 2025 |
| 424B3 | Prospectus | Mar 20, 2025 | — |
| 424B3 | Prospectus | Feb 21, 2025 | — |
| 8-K |
Current report
Material agreement
|
Feb 18, 2025 | Feb 11, 2025 |
| EFFECT | Filing | Feb 11, 2025 | — |
| CORRESP | Letter to the SEC | Feb 7, 2025 | — |
| CORRESP | Letter to the SEC | Feb 7, 2025 | — |
| S-1/A | Amended registration statement | Feb 6, 2025 | — |
| CORRESP | Letter to the SEC | Jan 28, 2025 | — |
| S-1/A | Amended registration statement | Jan 28, 2025 | — |
| UPLOAD | Letter from the SEC | Jan 8, 2025 | — |
| S-1 | Registration statement | Dec 12, 2024 | — |
Showing 66 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Savings Institutions, Not Federally Chartered (SIC 6036)
- Listed as
- WSBK (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- MD
- Headquarters
- Winchester, MA
- SEC filer status
- Non-accelerated filer, Smaller reporting company, Emerging growth company
- SEC CIK
- 2047235
Other Savings Institutions, Not Federally Chartered companies
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All 40 Savings Institutions, Not Federally Chartered companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.