Winchester Bancorp, Inc.
WSBK- Exchange
- Nasdaq
- Industry
- Savings Institutions, Not Federally Chartered
- SEC CIK
- 0002047235
No open-market purchases or sales by Winchester Bancorp, Inc. insiders were filed in the last 90 days; 21 institutions reported holding it in 13F filings for Q2 2026, worth $9.96M in total; no superinvestor holds it.
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsOpen market, last 90 days
- 0
- 13F holdersQ2 2026, +2 vs. previous quarter
- 21
- 13F valueReported value at the end of Q2 2026
- $9.96M
- Superinvestors holdingAt the end of Q2 2026
- 0
Price chart
Superinvestors holding WSBK, Q2 2026
No superinvestor reported holding WSBK at the end of Q2 2026.
Latest insider trades
Open-market purchases and sales by Winchester Bancorp, Inc. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| May 27, 2026 (view filing) | May 26 | 1 day | Merritt Edward JDirector | PPurchase | +915 | $12.76 | +$11.7K | +4.6%20.9K after | |
| May 22, 2026 (view filing) | May 21 | 1 day | Carroll John APresident & CEO | PPurchase | +50 | $12.75 | +$637.5 | New position50 after | |
| May 8, 2026 (view filing) | May 7 | 1 day | Snow John Ingalls IIIDirector | PPurchase | +1.73K | $12.79 | +$22.1K | +9.6%19.7K after | 2 lots |
| May 6, 2026 (view filing) | May 5 | 1 day | Snow John Ingalls IIIDirector | PPurchase | +6.11K | $12.87 | +$78.6K | +48.9%18.6K after | |
| May 5, 2026 (view filing) | May 1 | 4 days | Boodakian Stephen HarryDirector | PPurchase | +2.50K | $12.93 | +$32.3K | New position2.50K after | |
| Jun 10, 2025 (view filing) | Jun 10 | Same day | Hood William PrestonDirector | PPurchase | +1.05K | $9.21 | +$9.67K | +2.1%51.0K after | |
| May 15, 2025 (view filing) | May 14 | 1 day | Hood William PrestonDirector | PPurchase | +5.00K | $9.58 | +$47.9K | +11.1%50.0K after | 3 lots |
| May 9, 2025 (view filing) | May 7-8 | 2 days | Hood William PrestonDirector | PPurchase | +20.0K | $9.66 | +$193.2K | +80.0%45.0K after | 13 lots |
| May 6, 2025 (view filing) | May 5 | 1 day | Carroll John APresident & CEO | PPurchase | +25.0K | $9.77 | +$244.2K | New position25.0K after | 10 lots |
Top 10 13F holders, Q2 2026
The largest institutional positions in Winchester Bancorp, Inc. at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Mangrove Partners | 186,201 | $2.45M | 0.16% | 00.0% | Unchanged |
| Vanguard Capital Management LLC | 178,941 | $2.35M | 0.00% | −2,572−1.4% | Reduced |
| Northstar Financial Companies, Inc. | 70,000 | $919.8K | 0.62% | 00.0% | Unchanged |
| Integrated Wealth Concepts LLC | 57,000 | $749.0K | 0.00% | 00.0% | Unchanged |
| Oppenheimer & Close, LLC | 50,000 | $657.0K | 0.41% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 31,400 | $412.6K | 0.00% | +400+1.3% | Added |
| Geode Capital Management, LLC | 29,037 | $381.8K | 0.00% | +15,117+108.6% | Added |
| Alliancebernstein L.P. | 24,656 | $313.1K | 0.00% | 00.0% | Unchanged |
| Vanguard Fiduciary Trust Co | 22,708 | $298.4K | 0.00% | +146+0.6% | Added |
| Raymond James Financial Inc | 20,000 | $262.8K | 0.00% | 00.0% | Unchanged |