WSBK · Winchester Bancorp, Inc./MD/ · Shareholders & Ownership
Market Cap
$120.28M
Shares
9.30M
Volume · Oct 20
3162
Avg daily vol (3M)
7853
Every disclosed holder of WSBK in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns WSBK
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 776,463 | 8.35% |
| Insiders (Forms 3, 4, 5) | 5,458,727 | 58.73% |
| 13D/G-only blocks | 0 | 0.00% |
| Remaining | 3,060,186 | 32.92% |
| Registered funds (N-PORT, not summed) | 200,896 | 2.16% |
Shares outstanding: 9,295,376, the issuer's latest cover-page count restated onto today's split basis.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of WSBK
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
|
5,112,457 | ||
| 1.1 |
|
5,112,457 | ||
| 2 |
MANGROVE PARTNERS IM, LLC
13F
CIK 1535392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
186,201 | ||
| 3 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
178,941 | ||
| 4 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
132,140 | ||
| 5 |
Northstar Financial Companies, Inc.
13F
CIK 2059828 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
70,000 | ||
| 6 |
Integrated Wealth Concepts LLC
13F
CIK 1737109 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
57,000 | ||
| 7 |
|
51,050 | ||
| 8 |
Oppenheimer & Close, LLC
13F
CIK 1591377 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
50,000 | ||
| 9 |
|
50,000 | ||
| 10 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
44,528 | ||
| 11 |
|
44,510 | ||
| 12 |
|
35,000 | ||
| 13 |
RENAISSANCE TECHNOLOGIES LLC
13F
CIK 1037389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
31,400 | ||
| 14 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
29,037 | ||
| 15 |
RFG - Bristol Wealth Advisors, LLC
13F
CIK 2055104 · Registered investment adviser · Sep 30, 2026
|
27,500 | ||
| 16 |
|
25,560 | ||
| 17 |
|
25,000 | ||
| 18 |
ALLIANCEBERNSTEIN L.P.
13F
CIK 1109448 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
24,656 | ||
| 19 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
22,708 | ||
| 20 |
|
22,235 | ||
| 21 |
|
20,915 | ||
| 22 |
|
20,000 | ||
| 23 |
|
20,000 | ||
| 24 |
RAYMOND JAMES FINANCIAL INC
13F
CIK 720005 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
20,000 | ||
| 25 |
Steward Partners Investment Advisory, LLC
13F
CIK 1723397 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
19,127 | ||
| 26 |
EagleClaw Capital Managment, LLC
13F
CIK 1607636 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
16,000 | ||
| 27 |
LPL Financial LLC
13F
CIK 1403438 · Broker-dealer · Jun 30, 2026
carried, not yet filed for the newest quarter
|
15,500 | ||
| 28 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
14,202 | ||
| 28.1 |
iShares Micro-Cap ETF
Fund
S000004439 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
13,357 | ||
| 29 |
|
10,000 | ||
| 30 |
Sachetta, LLC
13F
CIK 2010574 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
8,000 | ||
| 31 |
|
7,500 | ||
| 32 |
|
7,000 | ||
| 33 |
Fidelity Series Total Market Index Fund
Fund
S000065248 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
6,410 | ||
| 34 |
|
5,000 | ||
| 35 |
EASTERN BANK
13F
CIK 1126395 · Unknown · Sep 30, 2026
|
4,000 | ||
| 36 |
|
2,500 | ||
| 37 |
VANGUARD BALANCED INDEX FUND
Fund
S000002560 · Registered fund · Jun 30, 2026
VANGUARD VALLEY FORGE FUNDS, not summed
|
2,273 | ||
| 38 |
ROYAL BANK OF CANADA
13F
CIK 1000275 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,000 | ||
| 39 |
Fidelity Total Market Index Fund
Fund
S000006026 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
924 | ||
| 40 |
1290 VT Micro Cap Portfolio
Fund
S000044688 · Registered fund · Jun 30, 2026
EQ Advisors Trust, not summed
|
845 | ||
| 41 |
Victory Extended Market Index Fund
Fund
S000012941 · Registered fund · Jul 31, 2026
Victory Portfolios III, not summed
|
419 | ||
| 42 |
Tower Research Capital LLC (TRC)
13F
CIK 1533421 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
157 | ||
| 43 |
|
18 | ||
| 44 |
OSAIC HOLDINGS, INC.
13F
CIK 1677044 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
16 |
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.