1 institutions reported holding $52,560 of WINCHESTER BANCORP INC (WSBK) in SEC 13F filings for 2026-06-30. Largest institutional holders: EASTERN BANK ($52,560). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | EASTERN BANK | $52,560 | 4,000 | Added |
Source: SEC Form 13F filings · as of 2026-06-30