White Mountains Insurance
364 hedge funds and large institutions have $4.85B invested in White Mountains Insurance in 2026 Q1 according to their latest regulatory filings, with 50 funds opening new positions, 118 increasing their positions, 110 reducing their positions, and 26 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 funds holding
Funds holding: →
more ownership
Funds ownership: →
7% more repeat investments, than reductions
Existing positions increased: 118 | Existing positions reduced: 110
4% more capital invested
Capital invested by funds: $4.67B → $4.85B (+$182M)
Holders
364
Holding in Top 10
10
Calls
–
Puts
–
Top Buyers
| 1 | +$29.9M | |
| 2 | +$25.9M | |
| 3 | +$23.2M | |
| 4 |
Goldman Sachs
New York
|
+$22.5M |
| 5 |
American Century Companies
Kansas City,
Missouri
|
+$15.9M |
Top Sellers
| 1 | -$48.9M | |
| 2 | -$41.6M | |
| 3 | -$27.4M | |
| 4 |
Select Equity Group
New York
|
-$19.6M |
| 5 |
RP
Reinhart Partners
Mequon,
Wisconsin
|
-$14.1M |
