Winchester BancorpWSBK
13F holders, Q2 2026 (June 30)21holders +2
5new positions
3sold out
1famous investor
$13.13avg. 13F price*
At the end of Q2 2026, 21 institutions reported holding Winchester Bancorp Inc. (WSBK) in their 13F filings, up 2 from Q1 2026. 5 opened new positions and 3 sold out. The largest holders were Mangrove Partners Im, LLC ($2.4M), Vanguard Capital Management LLC ($2.4M) and Northstar Financial Companies, Inc. ($920K). One famous investor held it Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Winchester Bancorp Inc.
- CUSIP
- 97269D103
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 5 | $451K |
| Exits | 3 | $509K |
All 13F filers, Q1 2026 → Q2 2026: 51,539 shares bought and 42,949 shares sold, net +8,590 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 21 holders
| Mangrove Partners Im, LLC | 0.16% | No change | 186,201 | $2.4M |
| Vanguard Capital Management LLC | 0.00% | Reduce -1.4% | 178,941 | $2.4M |
| Northstar Financial Companies, Inc. | 0.62% | No change | 70,000 | $920K |
| Integrated Wealth Concepts LLC | 0.00% | No change | 57,000 | $749K |
| Oppenheimer & Close, LLC | 0.41% | No change | 50,000 | $657K |
| Renaissance Technologies | 0.00% | Add +1.3% | 31,400 | $413K |
| Geode Capital Management, LLC | 0.00% | Add +108.6% | 29,037 | $382K |
| Alliancebernstein L.P. | 0.00% | No change | 24,656 | $313K |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +0.7% | 22,708 | $298K |
| Raymond James Financial Inc. | 0.00% | No change | 20,000 | $263K |
| Steward Partners Investment Advisory, LLC | 0.00% | No change | 19,127 | $251K |
| EagleClaw Capital Managment, LLC | 0.03% | No change | 16,000 | $210K |
| LPL Financial LLC | 0.00% | No change | 15,500 | $204K |
| BlackRock, Inc. | 0.00% | New | 14,202 | $187K |
| RFG - Bristol Wealth Advisors, LLC | 0.03% | New | 10,158 | $133K |
| Sachetta, LLC | 0.05% | New | 8,000 | $105K |
| Eastern Bank | 0.00% | Add +60.0% | 4,000 | $53K |
| Royal Bank of Canada | 0.00% | New | 2,000 | $26K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -46.6% | 157 | $2K |
| UBS Group AG | 0.00% | Reduce -86.0% | 18 | $237 |
| Osaic Holdings, Inc. | 0.00% | New | 16 | $210 |
"% of holder's portfolio" is WSBK's weight in each manager's 13F, not the share of Winchester Bancorp Inc. the manager owns.