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White Mountains Insurance
WTM

Overview Fund Activity

319 hedge funds and large institutions have $4.16B invested in White Mountains Insurance in 2025 Q2 according to their latest regulatory filings, with 34 funds opening new positions, 103 increasing their positions, 107 reducing their positions, and 27 closing their positions.

Holders
319
Holders Change
–
Holders Change %
0%
% of All Funds
4.28%
Holding in Top 10
5
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-28.57%
% of All Funds
0.07%
New
34
Increased
103
Reduced
107
Closed
27
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
Norges Bank
1
Norges Bank
Norway
$54.8M
2
Neuberger Berman Group
2
Neuberger Berman Group
New York
$150M
3
CB
3
Cooke & Bieler
Pennsylvania
$138M
4
BFS
4
Bradley Foster & Sargent
Connecticut
$9.92M
5
Jane Street
5
Jane Street
New York
$10.9M

Top Sellers

1
First Trust Advisors
1
First Trust Advisors
Illinois
$10.2M
2
Select Equity Group
2
Select Equity Group
New York
$32.1M
3
Fuller & Thaler Asset Management
3
Fuller & Thaler Asset Management
California
$181M
4
APF
4
Alaska Permanent Fund
Alaska
$0
5
Morgan Stanley
5
Morgan Stanley
New York
$296M
Name Market Value Shares Shares
Change 		Shares
Change %
Renaissance Technologies
326
Renaissance Technologies
New York
– – -600 Closed
TC
327
TownSquare Capital
Utah
– – -357 Closed
SFI
328
Susquehanna Fundamental Investments
Pennsylvania
– – -331 Closed
Two Sigma Investments
329
Two Sigma Investments
New York
– – -300 Closed
VI
330
Vestcor Inc
New Brunswick, Canada
– – -219 Closed
P
331
Pitcairn
Pennsylvania
– – -133 Closed
Principal Financial Group
332
Principal Financial Group
Iowa
– – -125 Closed
HWM
333
HB Wealth Management
Georgia
– – -121 Closed
MF
334
Magnetar Financial
Illinois
– – -118 Closed
GT
335
Glenview Trust
Kentucky
– – -110 Closed
HSA
336
HBK Sorce Advisory
Pennsylvania
– – -108 Closed
BCI
337
Brinker Capital Investments
Pennsylvania
– – -108 Closed
BP
338
Ballentine Partners
Massachusetts
– – -106 Closed
CIS
339
Custom Index Systems
New York
– – -104 Closed
CCM
340
Coldstream Capital Management
Washington
– – -94 Closed
SFG
341
Stonebridge Financial Group
Pennsylvania
– – -60 Closed
QC
342
Quent Capital
New York
– – -56 Closed
HCP
343
Hexagon Capital Partners
Arkansas
– – -17 Closed
CF
344
Corebridge Financial
Texas
– – -17 Closed
BT
345
Banque Transatlantique
France
– – -3 Closed
MG
346
Mather Group
Illinois
– – -1 Closed
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