WHITE MOUNTAINS INSURANCE GROUP, LTD.

SUPPLEMENTAL INFORMATION FOR PROPERTY AND CASUALTY INSURANCE UNDERWRITERS

(Millions)



Column A	Column B		Column C		Column D			Column E		Column F		Column G		Column H					Column I		Column J		Column K
	Deferred acquisition costs⁽⁴⁾		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⁽⁴⁾ costs		Paid Claims and Claims Adjustment Expenses		Premiums written
Affiliation with registrant	Deferred acquisition costs⁽⁴⁾		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 ⁽²⁾			Amortization of deferred policy acquisition⁽⁴⁾ costs		Paid Claims and Claims Adjustment Expenses		Premiums written
OneBeacon⁽³⁾:
2014	$	103.2	$	1,342.2	$	1.0	⁽¹⁾	$	588.3	$	1,177.1	$	41.7	$	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		41.1		622.1		—			208.9		540.7		1,088.6
2012	123.9		1,000.0		4.6		⁽¹⁾	573.8		1,132.0		53.6		657.4		(7.4		)	249.4		565.1		1,179.2
Sirius Group:
2014	$	69.9	$	1,809.8	$	0.7	⁽²⁾	$	338.6	$	873.9	$	41.1	$	443.2	$	(98.0	)	$	193.6	$	544.9	$	882.5
2013	69.3		2,025.0		1.7		⁽²⁾	343.3		866.4		30.3		466.8		(48.4		)	166.5		628.1		876.6
2012	71.4		2,168.9		2.4		⁽²⁾	350.2		931.6		65.0		578.4		(34.5		)	180.8		741.2		947.7
Other operations⁽⁵⁾:
2014	$	—	$	7.8	$	—		$	—	$	0.8	$	0.2	$	6.7	$	2.2		$	—	$	14.8	$	5.9
2013	—		—		—			—		—		—		—		—			—		—		—
2012	—		—		—			—		—		—		—		—			—		—		—

⁽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%, 3.5% and 3.5% as of December 31, 2014, 2013 and 2012).


⁽²⁾	The amount shown represents unamortized fair value adjustments to reserves for unpaid claims and claims adjustment expenses made in purchase accounting as a result of White Mountains’s purchase of Sirius International during 2004.


⁽³⁾	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 and 2012. See Note 22 - “Discontinued Operations”.


⁽⁴⁾	In 2012, the Company adopted ASU 2010-26, Accounting for Costs Associated with Acquiring or Renewing Insurance Contracts (ASC 944). See Note 1 - “Summary of Significant Accounting Policies”.


⁽⁵⁾	The Other operations amounts shown relate to SSIE. SSIE’s results are attributed to non-controlling interests.

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