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White Mountains Insurance
WTM

Overview Fund Activity

319 hedge funds and large institutions have $4.38B invested in White Mountains Insurance in 2025 Q1 according to their latest regulatory filings, with 28 funds opening new positions, 101 increasing their positions, 106 reducing their positions, and 27 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
319
Holders Change
-3
Holders Change %
-0.93%
% of All Funds
4.33%
Holding in Top 10
7
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+16.67%
% of All Funds
0.1%
New
28
Increased
101
Reduced
106
Closed
27
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
FMI
Fiduciary Management Inc
Wisconsin
+$43.7M
2
CB
Cooke & Bieler
Pennsylvania
+$39.6M
3
Neuberger Berman Group
Neuberger Berman Group
New York
+$22M
4
T. Rowe Price Investment Management
T. Rowe Price Investment Management
Maryland
+$9.07M
5
Victory Capital Management
Victory Capital Management
Texas
+$8.75M

Top Sellers

1
Wellington Management Group
Wellington Management Group
Massachusetts
-$47.2M
2
Morgan Stanley
Morgan Stanley
New York
-$13.6M
3
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management
California
-$7.67M
4
RRAM
River Road Asset Management
Kentucky
-$5.3M
5
KBC Group
KBC Group
Belgium
-$3.73M
Name Holding Trade Value Shares
Change 		Shares
Change %
Luther King Capital Management (LKCM)
126
Luther King Capital Management (LKCM)
Texas
$1.17M -$77K -40 -6%
AI
127
Atria Investments
North Carolina
$1.17M -$46.2K -24 -4%
MAM
128
Martingale Asset Management
Massachusetts
$1.17M +$38.5K +20 +3%
Renaissance Technologies
129
Renaissance Technologies
New York
$1.16M – – –
Handelsbanken Fonder
130
Handelsbanken Fonder
Sweden
$1.16M – – –
MPPLM
131
Midwest Professional Planners Ltd (MPPL)
Wisconsin
$1.14M +$21.2K +11 +2%
EI
132
Ethic Inc
New York
$1.12M +$98.9K +52 +10%
Jane Street
133
Jane Street
New York
$1.11M +$560K +291 +101%
ANTB
134
AMG National Trust Bank
Colorado
$1.11M +$3.85K +2 +0.3%
Fidelity Investments
135
Fidelity Investments
Massachusetts
$1.1M -$241K -125 -18%
Manulife (Manufacturers Life Insurance)
136
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$1.07M +$57.8K +30 +6%
ET
137
Equitable Trust
Tennessee
$1.06M +$139K +72 +15%
RFC
138
Regions Financial Corp
Alabama
$1.06M – – –
VOYA Investment Management
139
VOYA Investment Management
Georgia
$1.01M +$55.8K +29 +6%
BIP
140
Brandes Investment Partners
California
$992K +$166K +86 +20%
KK
141
KLP Kapitalforvaltning
Norway
$973K -$193K -100 -17%
PIM
142
Parker Investment Management
California
$963K – – –
CSC
143
Cove Street Capital
California
$946K -$1.11M -576 -54%
STA
144
Summit Trail Advisors
New York
$936K +$374K +194 +66%
RAM
145
Resona Asset Management
Japan
$907K – – –
Franklin Resources
146
Franklin Resources
California
$896K +$84.7K +44 +10%
CPIG
147
Chicago Partners Investment Group
Illinois
$877K +$66.1K +37 +8%
PNC Financial Services Group
148
PNC Financial Services Group
Pennsylvania
$845K -$185K -96 -18%
HCM
149
Hengehold Capital Management
Ohio
$836K +$202K +105 +32%
SWM
150
Sendero Wealth Management
Texas
$807K +$356K +185 +79%
4 5
6
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