Winchester BancorpWSBK
13F holders, Q2 2025 (June 30)18holders
2famous investors
$8.95avg. 13F price*
At the end of Q2 2025, 18 institutions reported holding Winchester Bancorp Inc. (WSBK) in their 13F filings. The largest holders were Mangrove Partners Im, LLC ($1.5M), Vanguard Group Inc. ($617K) and M3F, Inc. ($531K). 2 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Winchester Bancorp Inc.
- CUSIP
- 97269D103
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 19 | $5.6M |
| Exits | 0 | $0 |
Ownership 18 holders
| Mangrove Partners Im, LLC | 0.17% | New | 169,098 | $1.5M |
| Vanguard Group Inc. | 0.00% | New | 68,982 | $617K |
| M3F, Inc. | 0.15% | New | 59,323 | $531K |
| Integrated Wealth Concepts LLC | 0.00% | New | 55,000 | $492K |
| Oppenheimer & Close, LLC | 0.34% | New | 50,000 | $448K |
| Citadel Advisors | 0.00% | New | 41,929 | $375K |
| Stilwell Value LLC | 0.17% | New | 25,000 | $224K |
| Millennium Management | 0.00% | New | 23,271 | $208K |
| Geode Capital Management, LLC | 0.00% | New | 20,992 | $188K |
| Raymond James Financial Inc. | 0.00% | New | 20,000 | $179K |
| Lynch & Associates | 0.03% | New | 18,183 | $163K |
| EagleClaw Capital Managment, LLC | 0.02% | New | 16,000 | $143K |
| LPL Financial LLC | 0.00% | New | 15,500 | $139K |
| UBS Group AG | 0.00% | New | 13,106 | $117K |
| Benin Management CORP | 0.02% | New | 10,500 | $94K |
| Bank of America Corp. | 0.00% | New | 10,211 | $91K |
| Steward Partners Investment Advisory, LLC | 0.00% | New | 2,500 | $22K |
| Tower Research Capital LLC (TRC) | 0.00% | New | 641 | $6K |
"% of holder's portfolio" is WSBK's weight in each manager's 13F, not the share of Winchester Bancorp Inc. the manager owns.