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WSBK

Winchester Bancorp
WSBK

19 hedge funds and large institutions have $9.48M invested in Winchester Bancorp in 2026 Q1 according to their latest regulatory filings, with 2 funds opening new positions, 3 increasing their positions, 3 reducing their positions, and 3 closing their positions.

New
Increased
Maintained
Reduced
Closed

18% more capital invested

Capital invested by funds: $8.06M → $9.48M (+$1.42M)

0% more repeat investments, than reductions

Existing positions increased: 3 | Existing positions reduced: 3

0.22% less ownership

Funds ownership: 8.3% → 8.07% (-0.22%)

10% less funds holding

Funds holding: 21 → 19 (-2)

33% less first-time investments, than exits

New positions opened: 2 | Existing positions closed: 3

Holders
19
Holders Change
-2
Holders Change %
-9.52%
% of All Funds
0.23%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
2
Increased
3
Reduced
3
Closed
3
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
Renaissance Technologies
Renaissance Technologies
New York
+$54.7K
2
UBS Group
UBS Group
Switzerland
+$1.53K
3
TRCT
Tower Research Capital (TRC)
New York
+$474

Top Sellers

Rank Fund Capital Flow
1
MI
M3F Inc
Utah
-$1.45M
2
Citadel Advisors
Citadel Advisors
Florida
-$219K
3
Geode Capital Management
Geode Capital Management
Massachusetts
-$153K
4
Millennium Management
Millennium Management
New York
-$55.2K
5
Bank of America
Bank of America
North Carolina
-$2.37K
Name Holding Trade Value Shares
Change 		Change in
Stake
MP
1
Mangrove Partners
Connecticut
$2.36M – – –
VCM
2
Vanguard Capital Management
Pennsylvania
$2.31M +$2.21M +181,513 New
NFC
3
Northstar Financial Companies
Pennsylvania
$889K – – –
IWC
4
Integrated Wealth Concepts
Massachusetts
$724K – – –
OC
5
Oppenheimer & Close
New York
$635K – – –
Renaissance Technologies
6
Renaissance Technologies
New York
$394K +$54.7K +4,498 +17%
MI
7
M3F Inc
Utah
$312K -$1.45M -119,400 -83%
VFT
8
Vanguard Fiduciary Trust
Pennsylvania
$287K +$274K +22,562 New
AllianceBernstein
9
AllianceBernstein
Tennessee
$258K – – –
Raymond James Financial
10
Raymond James Financial
Florida
$254K – – –
SPIA
11
Steward Partners Investment Advisory
New York
$243K – – –
ECM
12
EagleClaw Capital Management
Massachusetts
$203K – – –
LPL Financial
13
LPL Financial
California
$197K – – –
Geode Capital Management
14
Geode Capital Management
Massachusetts
$177K -$153K -12,582 -47%
Millennium Management
15
Millennium Management
New York
$147K -$55.2K -4,539 -28%
Morgan Stanley
16
Morgan Stanley
New York
$50.8K – – –
EB
17
Eastern Bank
Massachusetts
$31.8K – – –
TRCT
18
Tower Research Capital (TRC)
New York
$3.73K +$474 +39 +15%
UBS Group
19
UBS Group
Switzerland
$1.64K +$1.53K +126 +4,200%
Citadel Advisors
20
Citadel Advisors
Florida
– -$219K -20,999 Closed
Bank of America
21
Bank of America
North Carolina
– -$2.37K -227 Closed
Citigroup
22
Citigroup
New York
– -$10 -1 Closed

WSBK Hedge Fund Activity: Q1 2026 in Review

19 of the 8,128 institutional investors tracked by Wall St. Rank reported a position in Winchester Bancorp (WSBK) for Q1 2026, worth a combined $9.48M — up 18% from $8.06M a quarter earlier.

Sellers outnumbered buyers: 3 funds closed out of WSBK and 2 opened new positions — a net loss of 1 holder — while 3 trimmed existing stakes and 3 added.

The largest buyer was Renaissance Technologies, adding an estimated $54.7K. The largest seller was M3F Inc, cutting an estimated $1.45M.

  • 19 institutional investors held Winchester Bancorp (WSBK) as of Q1 2026, down from 21 in Q4 2025.
  • Funds reported $9.48M of Winchester Bancorp stock for Q1 2026, up 18% quarter-over-quarter.
  • 2 funds opened new Winchester Bancorp positions in Q1 2026 and 3 closed out, a net change of -1 holder.
  • The largest Winchester Bancorp buyer in Q1 2026 was Renaissance Technologies, an estimated $54.7K added.
  • The largest Winchester Bancorp seller in Q1 2026 was M3F Inc, an estimated $1.45M sold.

Based on aggregated 13F filings for Q1 2026.