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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 %
SAM
26
Southeastern Asset Management
Tennessee
$37.9M 21,094 +2,610 +14%
Brown Advisory
27
Brown Advisory
Maryland
$37.4M 20,854 -1,222 -6%
Select Equity Group
28
Select Equity Group
New York
$32.1M 17,872 -10,127 -36%
Robeco Institutional Asset Management
29
Robeco Institutional Asset Management
Netherlands
$32M 17,822 -1,332 -7%
Victory Capital Management
30
Victory Capital Management
Texas
$31.7M 17,640 +1,549 +10%
Envestnet Asset Management
31
Envestnet Asset Management
Illinois
$31.4M 17,511 +242 +1%
Northern Trust
32
Northern Trust
Illinois
$31.3M 17,405 -817 -4%
EP
33
Elkhorn Partners
Nebraska
$26.8M 14,900 -5 -0%
WCM Investment Management
34
WCM Investment Management
California
$23.4M 13,097 -148 -1%
UBS AM
35
UBS AM
Illinois
$22M 12,276 +989 +9%
STCG
36
Speece Thorson Capital Group
Minnesota
$20.4M 11,383 +224 +2%
HKAM
37
Horizon Kinetics Asset Management
New York
$19.7M 10,971 -374 -3%
Bank of New York Mellon
38
Bank of New York Mellon
New York
$19.5M 10,860 -1,710 -14%
California Public Employees Retirement System
39
California Public Employees Retirement System
California
$18.7M 10,394 -1,141 -10%
Wells Fargo
40
Wells Fargo
California
$17.2M 9,587 +237 +3%
TSW
41
Thompson Siegel & Walmsley
Virginia
$14.9M 8,305 -12 -0.1%
GKIM
42
GW&K Investment Management
Massachusetts
$14.9M 8,272 -195 -2%
AQR Capital Management
43
AQR Capital Management
Connecticut
$14.4M 8,084 -408 -5%
EP
44
Edgestream Partners
New Jersey
$14M 7,809 +4,269 +121%
PL
45
Perpetual Ltd
Australia
$13.9M 7,727 – –
Goldman Sachs
46
Goldman Sachs
New York
$12.4M 6,885 +2,626 +62%
Hotchkis & Wiley Capital Management
47
Hotchkis & Wiley Capital Management
California
$12.3M 6,869 -24 -0.3%
RA
48
Royce & Associates
New York
$11.9M 6,603 -4,985 -43%
American Century Companies
49
American Century Companies
Missouri
$11.4M 6,365 -671 -10%
Jane Street
50
Jane Street
New York
$10.9M 6,071 +5,493 +950%
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