WM
Schedule 13D filing
White Mountains Insurance Group Ltd disclosed a 35.1% stake in MAX
White Mountains Insurance Group Ltd reported owning 35.1% of MediaAlpha, Inc. (MAX) (17,856,614 shares) in a Schedule 13D filed Oct 31, 2026.
A 13D means the holder may push for changes at the company.
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From a public Schedule 13D, linked above. Not investment advice, and not a recommendation to buy or sell.