Winchester Bancorp, Inc./MD/ - WSBK

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2026 · Compare: Q4 2025
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
MANGROVE PARTNERS IM, LLC History No change 186,201 2,364 0.19% 0.16% 1 0 0.0% Q1 2026 May 15, 2026
VANGUARD CAPITAL MANAGEMENT LLC History New 181,513 2,305 0.0% 2 +181,513 New Q1 2026 May 15, 2026
Northstar Financial Companies, Inc. History No change 70,000 889 0.71% 0.58% 3 0 0.0% Q1 2026 May 05, 2026
VANGUARD GROUP INC History No change 71,736 749 0.0% 0.0% 4 0 0.0% Q4 2025 Jan 29, 2026
Integrated Wealth Concepts LLC History No change 57,000 723 0.01% 0.01% 5 0 0.0% Q1 2026 May 15, 2026
Oppenheimer & Close, LLC History No change 50,000 635 0.4% 0.36% 6 0 0.0% Q1 2026 May 12, 2026
RENAISSANCE TECHNOLOGIES LLC History Added to 31,000 393 0.0% 0.0% 7 +4,498 16.97% Q1 2026 May 14, 2026
M3F, Inc. History Reduced 24,586 312 0.08% 0.41% 8 -119,400 -82.92% Q1 2026 Apr 28, 2026
VANGUARD FIDUCIARY TRUST CO History New 22,562 286 0.0% 9 +22,562 New Q1 2026 May 08, 2026
ALLIANCEBERNSTEIN L.P. History No change 24,656 257 0.0% 0.0% 10 0 0.0% Q1 2026 May 15, 2026
RAYMOND JAMES FINANCIAL INC History No change 20,000 254 0.0% 0.0% 11 0 0.0% Q1 2026 May 14, 2026
Steward Partners Investment Advisory, LLC History No change 19,127 242 0.0% 0.0% 12 0 0.0% Q1 2026 May 08, 2026
EagleClaw Capital Managment, LLC History No change 16,000 203 0.03% 0.02% 13 0 0.0% Q1 2026 May 08, 2026
LPL Financial LLC History No change 15,500 196 0.0% 0.0% 14 0 0.0% Q1 2026 May 06, 2026
GEODE CAPITAL MANAGEMENT, LLC History Reduced 13,920 177 0.0% 0.0% 15 -12,582 -47.48% Q1 2026 May 15, 2026
MILLENNIUM MANAGEMENT LLC History Reduced 11,543 146 0.0% 0.0% 16 -4,539 -28.22% Q1 2026 May 15, 2026
MORGAN STANLEY History No change 4,000 50 0.0% 0.0% 17 0 0.0% Q1 2026 May 15, 2026
EASTERN BANK History No change 2,500 31 0.0% 0.0% 18 0 0.0% Q1 2026 Apr 07, 2026
Tower Research Capital LLC (TRC) History Added to 294 3 0.0% 0.0% 19 +39 15.29% Q1 2026 May 15, 2026
UBS Group AG History Added to 129 1 0.0% 20 +126 4200.0% Q1 2026 May 05, 2026
CITADEL ADVISORS LLC History Closed out 0 0 0.0% -20,999 -100.0% Q1 2026 May 15, 2026
BANK OF AMERICA CORP /DE/ History Closed out 0 0 0.0% -227 -100.0% Q1 2026 May 15, 2026
CITIGROUP INC History Closed out 0 0 -1 -100.0% Q1 2026 May 11, 2026