v3.26.1
Equity Method Eligible Investments (Tables)
 3 Months Ended
Mar. 31, 2026
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of significant equity method eligible investments
The following table presents the ownership interests and carrying values of White Mountains’s equity method eligible investments as of March 31, 2026 and December 31, 2025:
March 31, 2026December 31, 2025
$ in MillionsOwnership InterestCarrying ValueOwnership InterestCarrying Value
Kudu’s Participation Contracts (1)
4.1% - 30.0%
$1,352.2 
4.1% - 30.0%
$1,285.0 
Bamboo SPV
27.9%$260.0 27.9%$250.0 
BroadStreet SPV
10.9%$170.1 10.9%$160.0 
PassportCard/DavidShield53.8%$170.0 53.8%$170.0 
Investment in MediaAlpha (2)
28.4%$166.1 27.7%$231.2 
Other equity method eligible investments (3)
Under 50.0%$299.3 Under 50.0%$301.0 
(1) Ownership interest references basic ownership interest with the exception of Kudu’s Participation Contracts, which are generally noncontrolling equity interests in the form of revenue and earnings participation contracts.
(2) MediaAlpha’s ownership interest is based on the total class A and class B common shares outstanding.
(3) Includes certain other unconsolidated entities, private equity funds and an ILS fund.