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WHITE MOUNTAINS INSURANCE GROUP LTD

WHITE MOUNTAINS INSURANCE GROUP LTD is an Investment Adviser institutional filer with the SEC under CIK 776867, reporting 2 portfolio positions, with 19 historical 13F filings on file. Most recent reporting period: 2026-06-30.

A Form 13F reports a manager's US-listed stock and option positions only. It does not include real estate, private funds, bonds, cash or non-US holdings, so a 13F portfolio value is not the firm's total assets under management (AUM).

  • Sector: Fire, Marine & Casualty Insurance
  • State of incorporation: D0
  • Filing type: 13F-HR
  • Latest reporting period: 2026-06-30
  • Last filed: 2026-08-12

Top 2 portfolio positions

The largest reported holdings in WHITE MOUNTAINS INSURANCE GROUP LTD's most recent 13F filing, ranked by reported market value.

  1. MEDIAALPHA INC (MAX)
  2. SPDR S&P 500 ETF TR (SPY)
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