Institutional Manager · CIK 0000776867
WHITE MOUNTAINS INSURANCE GROUP LTD
Hanover, NH · File #028-01681
Latest AUM
$261.9M
Positions
2
Top-10 Concentration
100.0%
Filings
12
Sector Allocation
Filing History
View all filings →- 13F HOLDINGS REPORTQ/E Dec 20252 pos · $261.9M
- 13F HOLDINGS REPORTQ/E Sep 20251 pos · $203.2M
- 13F HOLDINGS REPORTQ/E Jun 20251 pos · $195.5M
- 13F HOLDINGS REPORTQ/E Mar 20252 pos · $285.9M
- 13F HOLDINGS REPORTQ/E Dec 20242 pos · $426.2M
- 13F HOLDINGS REPORTQ/E Sep 20242 pos · $543.2M
- 13F HOLDINGS REPORTQ/E Jun 20242 pos · $443.7M
- 13F HOLDINGS REPORTQ/E Mar 20242 pos · $617.2M
- 13F HOLDINGS REPORTQ/E Dec 20232 pos · $440.9M
- 13F HOLDINGS REPORTQ/E Sep 20232 pos · $508.2M
- 13F HOLDINGS REPORTQ/E Jun 20232 pos · $611.1M
- 13F HOLDINGS REPORTQ/E Mar 20232 pos · $502.4M
Top 2 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | MEDIAALPHA INC | MAX | 17,856,614 | $231.2M | 88.28% |
| 2 | SPDR S&P 500 ETF TR | SPY | 45,000 | $30.7M | 11.72% |