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White Mountains Insurance
WTM

Overview Fund Activity

322 hedge funds and large institutions have $4.17B invested in White Mountains Insurance in 2025 Q2 according to their latest regulatory filings, with 34 funds opening new positions, 103 increasing their positions, 110 reducing their positions, and 27 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
322
Holders Change
+3
Holders Change %
+0.94%
% of All Funds
4.32%
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
110
Closed
27
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
Neuberger Berman Group
Neuberger Berman Group
New York
$150M
2
CB
Cooke & Bieler
Pennsylvania
$138M
3
BFS
Bradley Foster & Sargent
Connecticut
$9.92M
4
Jane Street
Jane Street
New York
$10.9M
5
HF
HRT Financial
New York
$9.13M

Top Sellers

1
First Trust Advisors
First Trust Advisors
Illinois
$10.2M
2
Select Equity Group
Select Equity Group
New York
$32.1M
3
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management
California
$181M
4
APF
Alaska Permanent Fund
Alaska
$0
5
Morgan Stanley
Morgan Stanley
New York
$296M
Name Holding Trade Value Shares
Change 		Shares
Change %
Vanguard Group
1
Vanguard Group
Pennsylvania
$447M -$1.7M -946 -0.4%
Morgan Stanley
2
Morgan Stanley
New York
$296M -$10M -5,567 -3%
Dimensional Fund Advisors
3
Dimensional Fund Advisors
Texas
$280M -$1.55M -864 -0.6%
BlackRock
4
BlackRock
New York
$203M -$6.54M -3,641 -3%
RRAM
5
River Road Asset Management
Kentucky
$196M +$406K +227 +0.2%
Fuller & Thaler Asset Management
6
Fuller & Thaler Asset Management
California
$181M -$16.4M -9,108 -8%
Boston Partners
7
Boston Partners
Massachusetts
$160M +$7.46M +4,158 +5%
Neuberger Berman Group
8
Neuberger Berman Group
New York
$150M +$48.2M +26,835 +47%
WCM
9
Wallace Capital Management
Texas
$142M -$1.61M -895 -1%
CB
10
Cooke & Bieler
Pennsylvania
$138M +$39.7M +22,129 +40%
FMI
11
Fiduciary Management Inc
Wisconsin
$128M -$569K -317 -0.4%
LCOV
12
London Company of Virginia
Virginia
$124M -$697K -388 -0.6%
T. Rowe Price Investment Management
13
T. Rowe Price Investment Management
Maryland
$113M +$853K +475 +0.8%
State Street
14
State Street
Massachusetts
$103M +$4.12M +2,297 +4%
Geode Capital Management
15
Geode Capital Management
Massachusetts
$76.4M +$616K +343 +0.8%
RP
16
Reinhart Partners
Wisconsin
$74.9M -$1.41M -784 -2%
Bank of America
17
Bank of America
North Carolina
$70.8M -$2.96M -1,646 -4%
Lord, Abbett & Co
18
Lord, Abbett & Co
New Jersey
$57.9M -$1.12M -624 -2%
Raymond James Financial
19
Raymond James Financial
Florida
$55.1M -$1.88M -1,047 -3%
Norges Bank
20
Norges Bank
Norway
$54.8M +$54.8M +30,494 New
Allspring Global Investments
21
Allspring Global Investments
North Carolina
$53M +$8.46M +4,728 +19%
CS
22
Cannell & Spears
New York
$50.9M -$576K -321 -1%
Wellington Management Group
23
Wellington Management Group
Massachusetts
$44.3M -$1.41M -787 -3%
Charles Schwab
24
Charles Schwab
California
$43.4M -$939K -523 -2%
MAA
25
Mraz Amerine & Associates
California
$38.7M +$984K +548 +3%
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