WINCHESTER, MA
WINCHESTER BANCORP, INC./MD/WSBK— Latest position per institution from SEC 13F filings
15
Institutional holders
917.78K
Total shares held
11.33M
Estimated value
45.89K
Avg. position size
MANGROVE PARTNERS IM, LLC
CIK 1535392
Shares
186.20K
Value
2.45M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
178.94K
Value
2.35M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
71.74K
Value
749.64K
Filed
Dec 31, 2025
NORTHSTAR FINANCIAL COMPANIES, INC.
CIK 2059828
Shares
70K
Value
919.80K
Filed
Jun 30, 2026
INTEGRATED WEALTH CONCEPTS LLC
CIK 1737109
Shares
57K
Value
748.98K
Filed
Jun 30, 2026
OPPENHEIMER & CLOSE, LLC
CIK 1591377
Shares
50K
Value
657K
Filed
Jun 30, 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
Shares
31.40K
Value
412.60K
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
29.04K
Value
381.81K
Filed
Jun 30, 2026
RFG - BRISTOL WEALTH ADVISORS, LLC
CIK 2055104
Shares
27.50K
Value
355.02K
Filed
Sep 30, 2026
STILWELL VALUE LLC
CIK 1397076
Shares
25K
Value
238.75K
Filed
Sep 30, 2025
ALLIANCEBERNSTEIN L.P.
CIK 1109448
Shares
24.66K
Value
313.13K
Filed
Jun 30, 2026
M3F, INC.
CIK 1511291
Shares
24.59K
Value
312.00
Filed
Mar 31, 2026
VANGUARD FIDUCIARY TRUST CO
CIK 933478
Shares
22.71K
Value
298.38K
Filed
Jun 30, 2026
CITADEL ADVISORS LLC
CIK 1423053
Shares
21K
Value
219.44K
Filed
Dec 31, 2025
RAYMOND JAMES FINANCIAL INC
CIK 720005
Shares
20K
Value
262.80K
Filed
Jun 30, 2026
STEWARD PARTNERS INVESTMENT ADVISORY, LLC
CIK 1723397
Shares
19.13K
Value
251.33K
Filed
Jun 30, 2026
EAGLECLAW CAPITAL MANAGMENT, LLC
CIK 1607636
Shares
16K
Value
210.24K
Filed
Jun 30, 2026
LPL FINANCIAL LLC
CIK 1403438
Shares
15.50K
Value
203.67K
Filed
Jun 30, 2026
BLACKROCK, INC.
CIK 2012383
Shares
14.20K
Value
186.61K
Filed
Jun 30, 2026
LYNCH & ASSOCIATES/IN
CIK 1108965
Shares
13.18K
Value
125.90K
Filed
Sep 30, 2025
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | MANGROVE PARTNERS IM, LLC | 1535392 | 186.20K | 2.45M | Jun 30, 2026 |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 178.94K | 2.35M | Jun 30, 2026 |
| 3 | VANGUARD GROUP INC | 102909 | 71.74K | 749.64K | Dec 31, 2025 |
| 4 | NORTHSTAR FINANCIAL COMPANIES, INC. | 2059828 | 70K | 919.80K | Jun 30, 2026 |
| 5 | INTEGRATED WEALTH CONCEPTS LLC | 1737109 | 57K | 748.98K | Jun 30, 2026 |
| 6 | OPPENHEIMER & CLOSE, LLC | 1591377 | 50K | 657K | Jun 30, 2026 |
| 7 | RENAISSANCE TECHNOLOGIES LLC | 1037389 | 31.40K | 412.60K | Jun 30, 2026 |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 29.04K | 381.81K | Jun 30, 2026 |
| 9 | RFG - BRISTOL WEALTH ADVISORS, LLC | 2055104 | 27.50K | 355.02K | Sep 30, 2026 |
| 10 | STILWELL VALUE LLC | 1397076 | 25K | 238.75K | Sep 30, 2025 |
| 11 | ALLIANCEBERNSTEIN L.P. | 1109448 | 24.66K | 313.13K | Jun 30, 2026 |
| 12 | M3F, INC. | 1511291 | 24.59K | 312.00 | Mar 31, 2026 |
| 13 | VANGUARD FIDUCIARY TRUST CO | 933478 | 22.71K | 298.38K | Jun 30, 2026 |
| 14 | CITADEL ADVISORS LLC | 1423053 | 21K | 219.44K | Dec 31, 2025 |
| 15 | RAYMOND JAMES FINANCIAL INC | 720005 | 20K | 262.80K | Jun 30, 2026 |
| 16 | STEWARD PARTNERS INVESTMENT ADVISORY, LLC | 1723397 | 19.13K | 251.33K | Jun 30, 2026 |
| 17 | EAGLECLAW CAPITAL MANAGMENT, LLC | 1607636 | 16K | 210.24K | Jun 30, 2026 |
| 18 | LPL FINANCIAL LLC | 1403438 | 15.50K | 203.67K | Jun 30, 2026 |
| 19 | BLACKROCK, INC. | 2012383 | 14.20K | 186.61K | Jun 30, 2026 |
| 20 | LYNCH & ASSOCIATES/IN | 1108965 | 13.18K | 125.90K | Sep 30, 2025 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.