Michaela J. Hildreth

White Mountains Insurance Group Ltd

Assets Managed

$313.369M

Holdings

Last Quarter

2026 - Q1

Filed Date

18d ago

Growth Rate

19.64%(2Q avg: 24.27%)

Sustained Growth

3 quarters

Portfolio positions

This chart displays the top 10 holdings in White Mountains Insurance Group Ltd's 2026 - Q1 portfolio, based on their 13F SEC filing, out of a total of 2 positions.

Assets under management

The assets under management (AUM) of White Mountains Insurance Group Ltd over the past 10 years (40 quarters) show continuous growth in total asset value over the last 3 quarters. As of the latest 13F SEC filing for 2026 - Q1, they manage 313.369M in assets, with a quarterly growth rate of 19.64% and a 2-quarter average growth rate of 24.27%. The portfolio is managed by Michaela J. Hildreth, and others.

Portfolio holdings

Investment	Portfolio %	Reported Value	Recent Activity
MAX Mediaalpha Inc-class A Recent Activity	53%	$166.067M 17.857M shares@ $9.3 avg price
SPY Spdr S&p 500 Etf Trust Recent Activity Increased 403.34%	47.01%	$147.302M 226,500 shares@ $650.34 avg price	Increased 403.34%

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