SCHEDULE I SUMMARY OF INVESTMENTS-OTHER THAN INVESTMENTS IN RELATED PARTIES

12 Months Ended

Dec. 31, 2018

SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract]

SCHEDULE I SUMMARY OF INVESTMENTS-OTHER THAN INVESTMENTS IN RELATED PARTIES

WHITE MOUNTAINS INSURANCE GROUP, LTD.

SUMMARY OF INVESTMENTS—OTHER THAN

INVESTMENTS IN RELATED PARTIES

At December 31, 2018

Millions	Cost		Carrying Value		Fair Value
Fixed maturity investments:
U.S. Government and government agencies and authorities	$	154.0	$	153.2	$	153.2
Debt securities issued by corporations	519.0		510.5		510.5
States, municipalities and political subdivisions	279.0		280.3		280.3
Mortgage and asset-backed securities	136.1		133.5		133.5
Total fixed maturity investments	1,088.1		1,077.5		1,077.5
Short-term investments	214.2		214.2		214.2
Common equity securities:
Exchange traded funds	681.8		675.3		675.3
Banks, trust and insurance companies	11.8		13.5		13.5
Industrial, miscellaneous and other	211.1		236.8		236.8
Total common equity securities	904.7		925.6		925.6
Other long-term investments	330.3		325.6		325.6
Total investments	$	2,537.3	$	2,542.9	$	2,542.9