SCHEDULE IV REINSURANCE

12 Months Ended

Dec. 31, 2022

SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]

Schedule IV - Reinsurance

WHITE MOUNTAINS INSURANCE GROUP, LTD.

REINSURANCE

Column A	Column B		Column C		Column D		Column E		Column F
$ in Millions Premiums Earned	Gross Amount		Ceded to Other Companies		Assumed from Other Companies		Net Amount		Percentage of Amount Assumed to Net
Year ended:
December 31, 2022
HG Global/BAM	$	28.6	$	—	$	4.7	$	33.3	14.1	%
Ark	655.5		(280.8)		668.7		1,043.4		64.1
December 31, 2021
HG Global/BAM	23.2		—		3.7		26.9		13.8
Ark	556.0		(249.1)		330.4		637.3		51.8
December 31, 2020
HG Global/BAM	19.4		—		3.4		22.8		14.9

Schedules of the Registrant should be read in conjunction with the Consolidated Financial Statements and Notes.