Schedule III Supplementary Insurance Information

12 Months Ended

Dec. 31, 2011

Supplementary Insurance Information [Abstract]

Supplementary Insurance Information

Schedule III

ALLIED WORLD ASSURANCE COMPANY HOLDINGS, AG

SUPPLEMENTARY INSURANCE INFORMATION

(Expressed in thousands of United States dollars)

Year Ended December 31, 2011

	Net Deferred Acquisition Costs		Reserve for Losses and Loss Expenses		Unearned Premiums		Net Premiums Earned		Net Investment Income		Losses and Loss Expenses		Amortization  of Deferred Acquisition Costs			Other Operating Expenses		Net Premiums Written
U.S. insurance	$	37,028	$	1,662,480	$	467,392	$	584,303	$	—	$	387,099	$	74,976		$	124,434	$	639,196
International insurance		2,395		2,249,012		304,509		317,006		—		206,593		(2,781	)		84,290		325,094
Reinsurance		60,911		1,313,651		306,511		555,683		—		365,464		95,100			62,932		569,476
Corporate		—		—		—		—		195,948		—		—			—		—
Total	$	100,334	$	5,225,143	$	1,078,412	$	1,456,992	$	195,948	$	959,156	$	167,295		$	271,656	$	1,533,766

Year Ended December 31, 2010

	Net Deferred Acquisition Costs		Reserve for Losses and Loss Expenses		Unearned Premiums		Net Premiums Earned		Net Investment Income		Losses and Loss Expenses		Amortization  of Deferred Acquisition Costs			Other Operating Expenses		Net Premiums Written
U.S. insurance	$	32,778	$	1,431,707	$	392,787	$	518,444	$	—	$	297,517	$	67,797		$	128,556	$	551,063
International insurance		2,279		2,226,725		277,808		338,791		—		160,153		(460	)		94,226		319,083
Reinsurance		61,746		1,220,756		291,608		502,313		—		250,213		92,152			63,775		522,309
Corporate		—		—		—		—		244,143		—		—			—		—
Total	$	96,803	$	4,879,188	$	962,203	$	1,359,548	$	244,143	$	707,883	$	159,489		$	286,557	$	1,392,455

Year Ended December 31, 2009(1)

	Net Deferred Acquisition Costs		Reserve for Losses and Loss Expenses		Unearned Premiums		Net Premiums Earned		Net Investment Income		Losses and Loss Expenses		Amortization  of Deferred Acquisition Costs		Other Operating Expenses		Net Premiums Written
U.S. insurance	$	28,417	$	1,253,711	$	356,437	$	447,491	$	—	$	211,363	$	58,114	$	115,797	$	493,067
International insurance		2,974		2,356,340		302,773		413,170		—		158,062		2,742		84,390		362,893
Reinsurance		56,430		1,151,721		269,409		456,231		—		234,635		87,991		48,405		465,165
Corporate		—		—		—		—		300,675		—		—		—		—
Total	$	87,821	$	4,761,772	$	928,619	$	1,316,892	$	300,675	$	604,060	$	148,847	$	248,592	$	1,321,125

(1) Represents balances of Allied World Assurance Company Holdings, Ltd prior to the redomestication in 2010