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White Mountains Insurance

320 hedge funds and large institutions have $4.38B invested in White Mountains Insurance in 2025 Q1 according to their latest regulatory filings, with 26 funds opening new positions, 102 increasing their positions, 107 reducing their positions, and 27 closing their positions.

New
Increased
Maintained
Reduced
Closed

more funds holding in top 10

Funds holding in top 10:

more ownership

Funds ownership:

less funds holding

Funds holding:

less capital invested

Capital invested by funds: $ → $

4% less first-time investments, than exits

New positions opened: 26 | Existing positions closed: 27

5% less repeat investments, than reductions

Existing positions increased: 102 | Existing positions reduced: 107

Holders
320
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
126
$1.31M
127
$1.17M
128
$1.17M
129
$1.17M
130
$1.16M
131
$1.16M
132
$1.14M
133
$1.12M
134
$1.11M
135
$1.11M
136
$1.1M
137
$1.07M
138
$1.06M
139
$1.06M
140
$1.01M
141
$992K
142
$973K
143
$963K
144
$946K
145
$936K
146
$907K
147
$896K
148
$877K
149
$845K
150
$836K