SightfileU.S. market data from official filings

WINCHESTER BANCORP INC (WSBK)

Name: WINCHESTER BANCORP INC (WSBK) — Institutional ownership, SEC filings and insider activity
Creator: Sightfile
License: https://www.sec.gov/privacy#dissemination

Institutional ownership, SEC filings and insider activity

Sector: Financials · SEC CIK 0002047235 · EDGAR filings · Updated 2026-05-27

WINCHESTER BANCORP INC (WSBK) has reported institutional ownership of 8.1%, with 19 institutional managers holding positions valued at $9.48M per the latest 13F reporting period.

Institutional ownership

8.1%

Institutional managers

Reported 13F value

$9.48M

Insider activity

27 trans.

$495.0K net buying

Latest updates

2026-05-27 — Insider transaction reported (Form 4)
2026-05-22 — Insider transaction reported (Form 4)
2026-05-13 — Quarterly report (10-Q) filed
2026-05-08 — Insider transaction reported (Form 4)
2026-05-06 — Insider transaction reported (Form 4)
2026-05-05 — Insider transaction reported (Form 4)

Institutional ownership overview

According to SEC 13F filings tracked by Sightfile, WINCHESTER BANCORP INC has 19 institutional holders and institutional ownership of 8.1%.

Insider activity

Insiders reported 27 transactions (27 buys, 0 sells) across 16 reporting insiders, with a net reported value of $495.0K.

Related companies

ELLINGTON CREDIT COMPANY (EARN) · AMPLIFY COMMODITY TRUST (BDRY) · INVESCO GALAXY ETHEREUM ETF (QETH) · Coastal Carolina Bancshares, Inc. (CCNB) · HORIZON SPACE ACQUISITION II C (HSPT) · SACHEM CAPITAL CORP (SACH)

See full history, cross-references and alerts on Sightfile

Sightfile provides information only — not investment advice, recommendations, or an assessment of any security. Data is derived from official public sources (SEC EDGAR and U.S. government agencies), may contain errors or delays, and should be verified against the source filing before relying on it.
Data sources: SEC EDGAR (filings, 13F, FTD), aggregated by Sightfile. Page updated 2026-05-27.