SCHEDULE IV REINSURANCE

12 Months Ended

Dec. 31, 2021

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, 2021
HG Global/BAM	$	23.2	$	—	$	3.7	$	26.9	13.8	%
Ark	886.4		(249.1)		—		637.3		—
December 31, 2020
HG Global/BAM	19.4		—		3.4		22.8		14.9
December 31, 2019
HG Global/BAM	13.6		—		2.7		16.3		16.6

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