White Mountains Insurance
350 hedge funds and large institutions have $4.67B invested in White Mountains Insurance in 2025 Q4 according to their latest regulatory filings, with 53 funds opening new positions, 102 increasing their positions, 127 reducing their positions, and 35 closing their positions.
New
Increased
Maintained
Reduced
Closed
more first-time investments, than exits
New positions opened: | Existing positions closed:
more funds holding in top 10
Funds holding in top 10: →
more capital invested
Capital invested by funds: $ → $
more funds holding
Funds holding: →
2.03% less ownership
Funds ownership: 90.41% → 88.38% (-2%)
20% less repeat investments, than reductions
Existing positions increased: 102 | Existing positions reduced: 127
100% less call options, than puts
Call options by funds: $0 | Put options by funds: $1.9M
Holders
350
Holding in Top 10
8
Calls
–
Puts
$1.9M
Top Buyers
| 1 | +$63.6M | |
| 2 | +$28.6M | |
| 3 | +$22.1M | |
| 4 |
UBS AM
Chicago,
Illinois
|
+$15M |
| 5 |
D.E. Shaw & Co
New York
|
+$11.9M |
Top Sellers
| 1 | -$111M | |
| 2 | -$32.5M | |
| 3 | -$22.5M | |
| 4 |
Vanguard Group
Malvern,
Pennsylvania
|
-$22.1M |
| 5 |
Bank of America
Charlotte,
North Carolina
|
-$19.6M |
