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WHITE MOUNTAINS INSURANCE GROUP LTD

insuranceUpdated 29 days ago

Managed by White Mountains Insurance Group Ltd • Latest filing Q2 2026

Portfolio value
$393.6M
Q2 2026
Filings
14
Quarterly 13F history
Top-10 concentration
100.0%
Weight of largest holdings
Annualized return
-26.5%
Implied from 13F holdings

Portfolio value history

13F-disclosed portfolio value over 14 quarters

Show data table
PeriodPortfolio value
Q1 2023$611.1M
Q2 2023$508.2M
Q3 2023$440.9M
Q4 2023$392.6M
Q1 2024$617.2M
Q2 2024$443.7M
Q3 2024$543.2M
Q4 2024$426.2M
Q1 2025$285.9M
Q2 2025$195.5M
Q3 2025$203.2M
Q4 2025$261.9M
Q1 2026$313.4M
Q2 2026$393.6M

Top holdings

2 positions as of Q2 2026

View filing
M
1.MAX

MEDIAALPHA INC

Value
$224.5M
Shares
17.86M
% Port
57.03%
S
2.SPY

SPDR S&P 500 ETF TR

Value
$169.1M
Shares
226.5K
% Port
42.97%

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