WSBK — WINCHESTER BANCORP INC
As of Q2 2026, 4 SEC-registered investment managers reported holding WSBK (WINCHESTER BANCORP INC) in their latest 13F filings, with a combined reported value of $981.26K across 74.66K shares. That is +23.2% by share count (+14.06K shares) versus the previous quarter, while reported value moved +27.5%. Ownership is concentrated: the five largest holders account for 100.0% of reported value and the top ten for 100.0%.
Compared with the prior quarter, 1 opened new positions, 2 added to existing stakes, 1 trimmed, 2 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.
WSBK is classified in the Financials sector.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.
Q2 2026 — 4 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Renaissance Technologies history | 31.40K | $412.60K | 0.00% | Add |
| Geode Capital Management history | 29.04K | $381.81K | 0.00% | Add |
| BlackRock Inc history | 14.20K | $186.61K | 0.00% | New |
| UBS Group AG history | 18 | $237 | 0.00% | Reduce |
Q1 2026 — 5 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Renaissance Technologies history | 31.00K | $393.70K | 0.00% | Add |
| Geode Capital Management history | 13.92K | $177.02K | 0.00% | Reduce |
| Millennium Management history | 11.54K | $146.60K | 0.00% | Reduce |
| Morgan Stanley history | 4.00K | $50.80K | 0.00% | Hold |
| UBS Group AG history | 129 | $1.64K | 0.00% | Add |
Q4 2025 — 9 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Vanguard Group history | 71.74K | $749.64K | 0.00% | Add |
| Renaissance Technologies history | 26.50K | $276.95K | 0.00% | New |
| Geode Capital Management history | 26.50K | $276.94K | 0.00% | Add |
| Citadel Advisors history | 21.00K | $219.44K | 0.00% | Reduce |
| Millennium Management history | 16.08K | $168.06K | 0.00% | Reduce |
| Morgan Stanley history | 4.00K | $41.80K | 0.00% | Hold |
| Bank of America Corp history | 227 | $2.37K | 0.00% | Add |
| UBS Group AG history | 3 | $31 | 0.00% | Reduce |
| Citigroup Inc history | 1 | $10 | 0.00% | Hold |
Q3 2025 — 8 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Vanguard Group history | 69.17K | $663.31K | 0.00% | Hold |
| Citadel Advisors history | 26.44K | $253.54K | 0.00% | Reduce |
| Geode Capital Management history | 23.90K | $229.16K | 0.00% | Add |
| Millennium Management history | 18.95K | $181.70K | 0.00% | Reduce |
| UBS Group AG history | 7.80K | $74.50K | 0.00% | Reduce |
| Morgan Stanley history | 4.00K | $38.20K | 0.00% | New |
| Bank of America Corp history | 225 | $2.15K | 0.00% | Reduce |
| Citigroup Inc history | 1 | $10 | 0.00% | New |
Q2 2025 — 6 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Vanguard Group history | 68.98K | $617.39K | 0.00% | New |
| Citadel Advisors history | 41.93K | $375.26K | 0.00% | New |
| Millennium Management history | 23.27K | $208.28K | 0.00% | New |
| Geode Capital Management history | 20.99K | $187.88K | 0.00% | New |
| UBS Group AG history | 13.11K | $117.30K | 0.00% | New |
| Bank of America Corp history | 10.21K | $91.39K | 0.00% | New |
New Positions (Q2 2026)
- BlackRock Inc 14.20K sh · $186.61K
Fully Exited (vs previous quarter)
- Millennium Management sold 11.54K sh · $146.60K
- Morgan Stanley sold 4.00K sh · $50.80K
Fund Position History — shares by quarter (top 10 funds)
| Fund | Q2 2026 | Q1 2026 | Q4 2025 | Q3 2025 | Q2 2025 |
|---|---|---|---|---|---|
| Renaissance Technologies | 31.40K | 31.00K | 26.50K | — | — |
| Geode Capital Management | 29.04K | 13.92K | 26.50K | 23.90K | 20.99K |
| BlackRock Inc | 14.20K | — | — | — | — |
| UBS Group AG | 18 | 129 | 3 | 7.80K | 13.11K |
| Citadel Advisors | — | — | 21.00K | 26.44K | 41.93K |
| Morgan Stanley | — | 4.00K | 4.00K | 4.00K | — |
| Bank of America Corp | — | — | 227 | 225 | 10.21K |
| Citigroup Inc | — | — | 1 | 1 | — |
| Millennium Management | — | 11.54K | 16.08K | 18.95K | 23.27K |
| Vanguard Group | — | — | 71.74K | 69.17K | 68.98K |
▲ Bought Low (fund opened/added, stock rose ≥5% next quarter) ▼ Sold High (fund reduced, stock fell ≥5% next quarter)
Drag / scroll to zoom · Default shows the most recent year · Annotations come from quarterly fund actions in 13F filings · Hover a marker for details