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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
226
$283K
227
$283K
228
$281K
229
$275K
230
$273K
231
$272K
232
$264K
233
$264K
234
$258K
235
$258K
236
$256K
237
$254K
238
$241K
239
$241K
240
$241K
241
$239K
242
$233K
243
$233K
244
$227K
245
$223K
246
$223K
247
$223K
248
$212K
249
$208K
250
$208K