DOSSIER · 13F-HR · Q1 2026
WHITE MOUNTAINS INSURANCE GROUP LTD
WHITE MOUNTAINS INSURANCE's pension fund based in Boston, MA — $313M in tracked AUM across 2 positions as of Q1 2026.
WM
WHITE MOUNTAINS INSURANCE·Boston, MA·Pension Fund
CIK 0000776867 · last filed Mar 31, 2026
AI Analysis · Q1 2026 · Q1 2026
Portfolio Overview
White Mountains Insurance Group Ltd (WTM) presents a highly concentrated and specialized investment portfolio as of the third quarter of 2025. With a total market value of approximately $203.21 million, the portfolio is characterized by extreme concentration, comprising only a single holding. This represents a slight increase of 3.9% in total value compared to the previous quarter's $195.53 million. The lack of diversification—evidenced by a count of just one security—ind...
Quarter at a glance — Q1 2026
Position-change comparison pending.
No quarter-over-quarter changes available.
Top 10 holdings
By portfolio weight as of Q1 2026.
Filing history
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