Vault-13

WINCHESTER BANCORP INC WSBK

COM · Common Stock · CUSIP 97269D103

21 institutional holders +2 vs Q1 2026
784,121784.1k shares reported held*
8.4% of all shares outstanding*
$10.3mreported value*
5 new 5 added 3 reduced 3 sold out net bought ≈ $441.4k (+33.6k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 9.3m as of 2026-05-13, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $13.13.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

0102030Q2 25: 19Q3 25: 22Q4 25: 21Q1 26: 19Q2 26: 2121Q2 25Q3 25Q4 25Q1 26Q2 26
Numbers
QuarterHolders
Q2 202519
Q3 202522
Q4 202521
Q1 202619
Q2 202621

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
10010Q3 25: 9 bought or addedQ3 25: 7 cut or sold outQ3 25Q4 25: 8 bought or addedQ4 25: 8 cut or sold outQ4 25Q1 26: 3 bought or addedQ1 26: 6 cut or sold outQ1 26Q2 26: 10 bought or addedQ2 26: 6 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q3 202597
Q4 202588
Q1 202636
Q2 2026106

Biggest buyers

Integrated Wealth Concepts LLC Added +25,000+25.0k
GEODE CAPITAL MANAGEMENT, LLC Added +15,117+15.1k
BlackRock, Inc. New +14,202+14.2k
RFG - Bristol Wealth Advisors, LLC New +10,158+10.2k
Sachetta, LLC New +8,000+8.0k
ROYAL BANK OF CANADA New +2,000+2.0k
EASTERN BANK Added +1,500+1.5k
RENAISSANCE TECHNOLOGIES LLC Added +400+400
VANGUARD FIDUCIARY TRUST CO Added +146+146
OSAIC HOLDINGS, INC. New +16+16

Biggest sellers

M3F, Inc. Sold out -24,586-24.6k
MILLENNIUM MANAGEMENT LLC Sold out -11,543-11.5k
MORGAN STANLEY Sold out -4,000-4.0k
VANGUARD CAPITAL MANAGEMENT LLC Reduced -2,572-2.6k
Tower Research Capital LLC (TRC) Reduced -137-137
UBS Group AG Reduced -111-111

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Winchester Bancorp, MHC 13D · may seek influence new · filed 2025-05-14
Stated purposeWhile the Reporting Person intends to exercise its rights as majority stockholder of the Issuer, neither the Reporting Person nor any of the Insiders currently has any plans or proposals which relate to or would result in: (a) the acquisition by any person of additional securities of the Issuer or the disposition of securities of the Issuer; (b) an extraordinary corporate transaction, such as a merger, reorganization or liquidation, involving the Issuer or any of its subsidiaries; (c) a sale or transfer of a material amount of assets of the Issuer or any of its subsidiaries; (d) any change in the present Board of Directors or management of the Issuer, including any plans or proposals to change the number or term of directors or to fill any existing vacancies on the Board; (e) any material… Full filing
55.0% new 5.1m≈ $67.2m 2025-05-14

Insider purchases and sales since 1 Apr 2026

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
404Q4 24: 0 buyingQ4 24: 0 sellingQ1 25: 0 buyingQ1 25: 0 sellingQ1 25Q2 25: 2 buyingQ2 25: 0 sellingQ3 25: 0 buyingQ3 25: 0 sellingQ3 25Q4 25: 0 buyingQ4 25: 0 sellingQ1 26: 0 buyingQ1 26: 0 sellingQ1 26Q2 26: 4 buyingQ2 26: 0 sellingQ3 26: 0 buyingQ3 26: 0 sellingQ3 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20240—0——
Q1 20250—0——
Q2 20252$495.0k0——
Q3 20250—0——
Q4 20250—0——
Q1 20260—0——
Q2 20264$145.3k0——
Q3 20260—0——
DateInsiderTradeSharesPrice ValueTheir holding
2026-05-26 Merritt Edward J Director · By IRA Bought 915 $12.76 $11.7k915 shares +5%
2026-05-21 Carroll John A President & CEO, director · By Spouse as custodian for child Bought 50 $12.75 $63850 shares new
2026-05-07 Snow John Ingalls III Director Bought 1,725 $12.79 $22.1k1.7k shares +10%
2026-05-05 Snow John Ingalls III Director Bought 6,110 $12.87 $78.6k6.1k shares +49%
2026-05-01 Boodakian Stephen Harry Director · By IRA Bought 2,500 $12.93 $32.3k2.5k shares new

Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 MANGROVE PARTNERS IM, LLC 0.16% of their portfolio Greenwich, CT 186,201186.2k $2.4m $2.4m 0.16% Unchanged
2 VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 178,941178.9k $2.4m $2.4m 0.00% Reduced -2.6k -2,572
3 Integrated Wealth Concepts LLC 0.01% of their portfolio WALTHAM, MA 82,00082.0k $1.1m $1.1m 0.01% Added +25.0k +25,000
4 Northstar Financial Companies, Inc. 0.62% of their portfolio CONSHOHOCKEN, PA 70,00070.0k $919.8k $919.8k 0.62% Unchanged
5 Oppenheimer & Close, LLC 0.41% of their portfolio NEW YORK, NY 50,00050.0k $657.0k $657.0k 0.41% Unchanged
6 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 31,40031.4k $412.6k $412.6k 0.00% Added +400 +400
7 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 29,03729.0k $381.8k $381.8k 0.00% Added +15.1k +15,117
8 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 24,65624.7k $313.1k $313.1k 0.00% Unchanged
9 VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio MALVERN, PA 22,70822.7k $298.4k $298.4k 0.00% Added +146 +146
10 RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio ST. PETERSBURG, FL 20,00020.0k $262.8k $262.8k 0.00% Unchanged
11 Steward Partners Investment Advisory, LLC 0.00% of their portfolio STAMFORD, CT 19,12719.1k $251.3k $251.3k 0.00% Unchanged
12 EagleClaw Capital Managment, LLC 0.03% of their portfolio BOSTON, MA 16,00016.0k $210.2k $210.2k 0.03% Unchanged
13 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 15,50015.5k $203.7k $203.7k 0.00% Unchanged
14 BlackRock, Inc. 0.00% of their portfolio New York, NY 14,20214.2k $186.6k $186.6k 0.00% New
15 RFG - Bristol Wealth Advisors, LLC 0.03% of their portfolio TAUNTON, MA 10,15810.2k $133.5k $133.5k 0.03% New
16 Sachetta, LLC 0.05% of their portfolio LYNNFIELD, MA 8,0008.0k $105.1k $105.1k 0.05% New
17 EASTERN BANK 0.00% of their portfolio BOSTON, MA 4,0004.0k $52.6k $52.6k 0.00% Added +1.5k +1,500
18 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 2,0002.0k $26.0k $26.0k 0.00% New
19 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 157157 $2.1k $2.1k 0.00% Reduced -137 -137
20 UBS Group AG 0.00% of their portfolio ZURICH, V8 1818 $237 $237 0.00% Reduced -111 -111
21 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 1616 $210 $210 0.00% New