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White Mountains Insurance
325 hedge funds and large institutions have $4.17B invested in White Mountains Insurance in 2025 Q2 according to their latest regulatory filings, with 33 funds opening new positions, 103 increasing their positions, 112 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
Funds holding: →
less ownership
Funds ownership: →
less repeat investments, than reductions
Existing positions increased: | Existing positions reduced:
6% less capital invested
Capital invested by funds: $4.44B → $4.17B (-$277M)
29% less funds holding in top 10
Funds holding in top 10: 7 → 5 (-2)
Holders
325
Holding in Top 10
5
Calls
–
Puts
–
Top Buyers
| 1 | +$47.7M | |
| 2 | +$39.4M | |
| 3 | +$9.82M | |
| 4 |
Jane Street
New York
|
+$9.77M |
| 5 |
HF
HRT Financial
New York
|
+$9.05M |
Top Sellers
| 1 | -$30.7M | |
| 2 | -$18M | |
| 3 | -$16.2M | |
| 4 |
APF
Alaska Permanent Fund
Juneau,
Alaska
|
-$10.4M |
| 5 |
Morgan Stanley
New York
|
-$9.9M |