Equity Method Eligible Investments (Tables)

3 Months Ended

Mar. 31, 2025

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, 2025 and December 31, 2024:


	March 31, 2025			December 31, 2024
$ in Millions	Ownership Interest	Carrying Value		Ownership Interest	Carrying Value
Kudu’s Participation Contracts (1)	4.1% - 30.0%	$	1,120.4	4.1% - 30.0%	$	1,008.4
Investment in MediaAlpha	26.5%	165.0		26.6%	201.6
PassportCard/DavidShield	53.8%	150.0		53.8%	150.0
Elementum	26.6%	35.0		26.6%	35.0
Other equity method eligible investments, at fair value	Under 50.0%	233.4		Under 50.0%	243.7

(1) Ownership interest generally references basic ownership interest with the exception of Kudu’s Participation Contracts, which are noncontrolling equity interests in the form of revenue and earnings participation contracts.