13F

Stock

Winchester Bancorp Inc

Ticker not mapped · held by 19 managers

Reported value

$9.16M

Holders

19

+0 new · −3 exited

Holders’ est. mark

$1.11M

Price effect on 17 books still in the name

Largest holder

$2.36M

MANGROVE PARTNERS IM, LLC

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
MANGROVE PARTNERS IM, LLC186.2K$2.36M$419KAdded$419K
VANGUARD CAPITAL MANAGEMENT LLC181.5K$2.31MHeld
Northstar Financial Companies, Inc.70K$889K$157.5KAdded$157.5K
Integrated Wealth Concepts LLC57K$723.9K$128.3KAdded$128.3K
Oppenheimer & Close, LLC50K$635K$112.5KAdded$112.5K
Renaissance Technologies31K$393.7K$59.6KAdded$116.8K
VANGUARD FIDUCIARY TRUST CO22.6K$286.5KHeld
ALLIANCEBERNSTEIN L.P.24.7K$257.7K$0Held
RAYMOND JAMES FINANCIAL INC20K$254K$45KAdded$45K
Steward Partners Investment Advisory, LLC19.1K$242.9K$43KAdded$43K
EagleClaw Capital Managment, LLC16K$203.2K$36KAdded$36K
LPL Financial LLC15.5K$196.8K$34.9KAdded$34.9K
GEODE CAPITAL MANAGEMENT, LLC13.9K$177K$31.6KCut−$99.9K
MILLENNIUM MANAGEMENT LLC11.5K$146.6K$26KCut−$21.5K
MORGAN STANLEY4K$50.8K$9KAdded$9K
EASTERN BANK2.5K$31.8K$5.63KAdded$5.63K
Tower Research Capital LLC (TRC)294$3.73K$574Added$1.07K
UBS Group AG129$1.64K$7Added$1.61K
M3F, Inc.24.6K$312$55Cut−$1.19K

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.