WHITE MOUNTAINS INSURANCE GROUP, LTD.

SUPPLEMENTAL INFORMATION FOR PROPERTY AND CASUALTY INSURANCE UNDERWRITERS⁽⁴⁾

(Millions)



Column A	Column B		Column C		Column D			Column E		Column F		Column G		Column H					Column I			Column J		Column K
Affiliation with registrant	Deferred acquisition costs		Reserves for Unpaid Claims and Claims Adjustment Expenses		Discount, if any, deducted in Column C			Unearned Premiums		Earned Premiums		Net investment income		Claims and Claims Adjustment Expenses Incurred Related to					Amortization of deferred policy acquisition costs			Paid Claims and Claims Adjustment Expenses		Premiums written
Millions	Deferred acquisition costs		Reserves for Unpaid Claims and Claims Adjustment Expenses		Discount, if any, deducted in Column C			Unearned Premiums		Earned Premiums		Net investment income		Current Year ⁽¹⁾		Prior Year			Amortization of deferred policy acquisition costs			Paid Claims and Claims Adjustment Expenses		Premiums written
OneBeacon⁽²⁾:
2015	$	100.7	$	1,389.8	$	1.1	⁽¹⁾	$	560.3	$	1,176.2	$	45.9	$	702.5	$	(1.8	)	$	(213.8	)	$	677.5	$	1,136.6
2014	103.2		1,342.2		1.0		⁽¹⁾	588.3		1,177.1		43.4		725.3		89.8			(203.3		)	608.6		1,216.9
2013	103.7		1,054.3		3.0		⁽¹⁾	544.9		1,120.4		43.0		622.1		—			(208.9		)	540.7		1,088.6
Other operations⁽³⁾:
2015	$	—	$	6.0	$	—		$	2.1	$	8.7	$	.2	$	10.4	$	(2.2	)	$	—		$	10.4	$	10.1
2014	—		7.8		—			0.8		6.1		.2		6.7		2.2			—			14.8		5.9
2013	—		—		—			—		—		—		—		—			—			—		—

⁽¹⁾

The amounts shown represent OneBeacon’s discount on its long-term workers compensation loss and LAE reserves, as such liabilities constitute unpaid but settled claims under which the payment pattern and ultimate costs are fixed and determinable on an individual basis. OneBeacon discounts these reserves using a discount rate which is determined based on the facts and circumstances applicable at the time the claims are settled (2.5%, 2.5% and 3.5% as of December 31, 2015, 2014 and 2013).


⁽²⁾	The amounts shown excludes balances reclassified to held for sale in the consolidated balance sheets related to the Runoff Transaction as of December 31, 2013. See Note 22 - “Discontinued Operations”.


⁽³⁾	The Other operations amounts shown relate to SSIE. SSIE’s results are attributed to non-controlling interests.

⁽⁴⁾ Schedule excludes amounts related to Sirius Group for all periods presented. See Note 22 - “Discontinued Operations”.

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