WTM icon

White Mountains Insurance

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

New
Increased
Maintained
Reduced
Closed
Holders
318
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
7
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
Puts
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
Brown Advisory
26
Brown Advisory
Maryland
$42.5M
MAA
27
Mraz Amerine & Associates
California
$40M
Robeco Institutional Asset Management
28
Robeco Institutional Asset Management
Netherlands
$36.9M
SAM
29
Southeastern Asset Management
Tennessee
$35.6M
Northern Trust
30
Northern Trust
Illinois
$35.1M
Envestnet Asset Management
31
Envestnet Asset Management
Illinois
$33.3M
Victory Capital Management
32
Victory Capital Management
Texas
$31M
EP
33
Elkhorn Partners
Nebraska
$28.7M
WCM Investment Management
34
WCM Investment Management
California
$25.2M
Bank of New York Mellon
35
Bank of New York Mellon
New York
$24.2M
RA
36
Royce & Associates
New York
$22.3M
California Public Employees Retirement System
37
California Public Employees Retirement System
California
$22.2M
HKAM
38
Horizon Kinetics Asset Management
New York
$21.8M
UBS AM
39
UBS AM
Illinois
$21.7M
STCG
40
Speece Thorson Capital Group
Minnesota
$21.5M
Wells Fargo
41
Wells Fargo
California
$18M
GKIM
42
GW&K Investment Management
Massachusetts
$16.3M
AQR Capital Management
43
AQR Capital Management
Connecticut
$16.2M
TSW
44
Thompson Siegel & Walmsley
Virginia
$16M
NL
45
Nuveen LLC
North Carolina
$15M
PL
46
Perpetual Ltd
Australia
$14.9M
American Century Companies
47
American Century Companies
Missouri
$13.6M
Hotchkis & Wiley Capital Management
48
Hotchkis & Wiley Capital Management
California
$13.3M
APF
49
Alaska Permanent Fund
Alaska
$10.4M
PFC
50
Phocas Financial Corp
California
$10.4M