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White Mountains Insurance Group Ltd

13F filer · CIK 0000776867
Reported Aug 12, 2026
13F portfolio value$394MU.S. long equity reported on 13F
Positions20 new · 0 closed
Net flow last quarter$0Buys minus sells
Top 10 positions weight100.0%Concentration

Holdings

13F · last 4 quarters free
Scroll for earlier quarters
CompanyValue% of portfolio% of companyPOSITION CHANGE qoq %First reported
Q2 2026Reported Aug 12, 20262 positions
MAXMediaAlpha, Inc.$224M57.03%Not reportedNot reportedQ4 2020
SPYSPDR S&P 500 ETF Trust$169M42.97%Not reportedNot reportedQ3 2022
Q1 2026Reported May 12, 20262 positions
MAXMediaAlpha, Inc.$166M52.99%Not reportedNot reportedQ4 2020
SPYSPDR S&P 500 ETF Trust$147M47.01%Not reported+403.3%Q3 2022
Q4 2025Reported Feb 12, 20262 positions
MAXMediaAlpha, Inc.$231M88.28%Not reportedNot reportedQ4 2020
SPYSPDR S&P 500 ETF Trust$30.7M11.72%Not reportedNot reportedQ3 2022
Q3 2025Reported Nov 13, 20251 positions
MAXMediaAlpha, Inc.$203M100.00%Not reportedNot reportedQ4 2020
Premium opens every quarter this fund has filed
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