White Mountains Insurance Group Ltd.
In its 13F for Q1 2025 (holdings as of March 31, 2025, filed May 12, 2025), White Mountains Insurance Group Ltd. reported 2 stock positions worth $285.9 million. Its top holding was Mediaalpha Class A (MAX) at 57.7% of the portfolio, followed by SS SPDR S&P 500 ETF Trust-US (SPY, 42.3%). Compared with Q4 2024, it reduced 1. The biggest sale was SS SPDR S&P 500 ETF Trust-US (SPY, shares −44%).
- Most Recent 13F
- Q2 2026
- Location
- Hanover, NH
- CIK
- 0000776867
- Portfolio Value
- $285.9M (Q1 2025)
- SEC Filing
- 0001104659-25-047309 ↗ filed May 12, 2025
Holdings Value
Holdings 2 stocks · $285.9M
Portfolio Sells Q4 2024 → Q1 2025
| SPY SS SPDR S&P 500 ETF Trust-US | Reduce -43.6% | 42.30% | −10.40 |
Portfolio Buys Q4 2024 → Q1 2025
| None this quarter. | |||