New Positions
3 managers initiated
Top five by reported value
- M3 Wealth Management, LLC$731.5K
- RENAISSANCE TECHNOLOGIES LLC$276.9K
- ALLIANCEBERNSTEIN L.P.$257.7K
Winchester Bancorp Inc NASDAQ NMS - GLOBAL MARKET:WSBK
Institutional holders, quarter-over-quarter share deltas, and new and closed positions disclosed in Form 13F. Period 2025-12-31 · prior 2025-09-30.
3 new6 added13 reduced3 exited
Total Institutional Holders
22
as of 2025-12-31
Top Holder
MANGROVE PARTNERS
$1.9M
Largest QoQ Increase
M3 Wealth Management, LLC
+70,000 sh
Largest QoQ Decrease
Stilwell Value LLC
-25,000 sh
New Positions(3)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| M3 Wealth Management, LLC | 70,000 | +70,000 | $731.5K | +$731.5K | — |
| RENAISSANCE TECHNOLOGIES LLC | 26,502 | +26,502 | $276.9K | +$276.9K | — |
| ALLIANCEBERNSTEIN L.P. | 24,656 | +24,656 | $257.7K | +$257.7K | — |
Added To(6)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Steward Partners Investment Advisory, LLC | 19,127 | +8,377 | $199.9K | +$97.2K | 77.9% |
| VANGUARD GROUP INC | 71,736 | +2,569 | $749.6K | +$86.3K | 3.7% |
| Integrated Wealth Concepts LLC | 57,000 | +2,000 | $595.6K | +$70.4K | 3.6% |
| GEODE CAPITAL MANAGEMENT, LLC | 26,502 | +2,606 | $276.9K | +$47.8K | 10.9% |
| M3F, Inc. | 143,986 | +61,434 | $1.5K | +$717 | 74.4% |
| BANK OF AMERICA CORP /DE/ | 227 | +2 | $2.4K | +$225 | 0.9% |
Reduced(13)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| MANGROVE PARTNERS | 186,201 | -748 | $1.9M | +$160.4K | -0.4% |
| UBS Group AG | 3 | -7,798 | $31 | -$74.5K | -100.0% |
| Northstar Financial Companies, Inc. | 70,000 | 0 | $731.5K | +$63.0K | 0.0% |
| Oppenheimer & Close, LLC | 50,000 | 0 | $522.5K | +$45.0K | 0.0% |
| CITADEL ADVISORS LLC | 20,999 | -5,439 | $219.4K | -$34.1K | -20.6% |
| RAYMOND JAMES FINANCIAL INC | 20,000 | 0 | $209.0K | +$18.0K | 0.0% |
| EagleClaw Capital Managment, LLC | 16,000 | 0 | $167.2K | +$14.4K | 0.0% |
| LPL Financial LLC | 15,500 | 0 | $162.0K | +$13.9K | 0.0% |
| MILLENNIUM MANAGEMENT LLC | 16,082 | -2,865 | $168.1K | -$13.6K | -15.1% |
| MORGAN STANLEY | 4,000 | 0 | $41.8K | +$3.6K | 0.0% |
| EASTERN BANK | 2,500 | 0 | $26.1K | +$2.3K | 0.0% |
| Tower Research Capital LLC (TRC) | 255 | -100 | $2.7K | -$725 | -28.2% |
| CITIGROUP INC | 1 | 0 | $10 | $0 | 0.0% |
Sold Out(3)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Stilwell Value LLC | 0 | -25,000 | $0 | -$238.8K | — |
| LYNCH & ASSOCIATES/IN | 0 | -13,183 | $0 | -$125.9K | — |
| Benin Management CORP | 0 | -10,000 | $0 | -$95.5K | — |
Top Holders by reported value
Ranked by the dollar value reported on the latest Form 13F. Share counts reflect long positions as of 2025-12-31.
| Manager | Shares | $ Value | Δ Shares | QoQ % |
|---|---|---|---|---|
| MANGROVE PARTNERS | 186,201 | $1.9M | -748 | -0.4% |
| VANGUARD GROUP INC | 71,736 | $749.6K | +2,569 | 3.7% |
| Northstar Financial Companies, Inc. | 70,000 | $731.5K | 0 | 0.0% |
| M3 Wealth Management, LLC | 70,000 | $731.5K | +70,000 | — |
| Integrated Wealth Concepts LLC | 57,000 | $595.6K | +2,000 | 3.6% |
| Oppenheimer & Close, LLC | 50,000 | $522.5K | 0 | 0.0% |
| RENAISSANCE TECHNOLOGIES LLC | 26,502 | $276.9K | +26,502 | — |
| GEODE CAPITAL MANAGEMENT, LLC | 26,502 | $276.9K | +2,606 | 10.9% |
| ALLIANCEBERNSTEIN L.P. | 24,656 | $257.7K | +24,656 | — |
| CITADEL ADVISORS LLC | 20,999 | $219.4K | -5,439 | -20.6% |
| RAYMOND JAMES FINANCIAL INC | 20,000 | $209.0K | 0 | 0.0% |
| Steward Partners Investment Advisory, LLC | 19,127 | $199.9K | +8,377 | 77.9% |
| MILLENNIUM MANAGEMENT LLC | 16,082 | $168.1K | -2,865 | -15.1% |
| EagleClaw Capital Managment, LLC | 16,000 | $167.2K | 0 | 0.0% |
| LPL Financial LLC | 15,500 | $162.0K | 0 | 0.0% |
| MORGAN STANLEY | 4,000 | $41.8K | 0 | 0.0% |
| EASTERN BANK | 2,500 | $26.1K | 0 | 0.0% |
| Tower Research Capital LLC (TRC) | 255 | $2.7K | -100 | -28.2% |
| BANK OF AMERICA CORP /DE/ | 227 | $2.4K | +2 | 0.9% |
| M3F, Inc. | 143,986 | $1.5K | +61,434 | 74.4% |
New & Closed Positions this quarter
Closed Positions
3 managers exited
Top five by prior-quarter value
- Stilwell Value LLC$238.8K
- LYNCH & ASSOCIATES/IN$125.9K
- Benin Management CORP$95.5K
Methodology
Form 13F is the SEC's quarterly disclosure for institutional investment managers exercising discretion over $100 million or more in qualifying U.S. equity securities. Managers must file within 45 days of each calendar quarter end, which is why holdings shown here reflect a snapshot at the period date — not real-time positioning.
Quarter-over-quarter deltas compare each manager's most recently reported share count for WSBK against its prior-quarter count. New positions are entries where the prior count was zero; closed positions are entries where the current count is zero. Amendments (13F-HR/A) replace prior filings for the same period.
Source: SEC EDGAR Form 13F (XML information tables). Dollar values are as reported by the manager and may use mid-quarter pricing conventions. CUSIP-to-ticker resolution is best-effort.