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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1163348	Allied World Assurance Co Holdings Ag	AWH	Fire, Marine & Casualty Insurance (6331)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1428511	Gordon W. Knight	Allied World Assurance Co. Holdings, Ag Lindenstrasse 8 Baar/Zug V8 CH-67340	President, Awacus & Awnac	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Shares	Disposition	2012-02-28	1,600	$66.40	38,476	No	4	S	Direct
Common Shares	Disposition	2012-02-28	1,008	$66.40	37,468	No	4	F	Direct
Common Shares	Disposition	2012-02-29	8,400	$66.44	29,068	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	S	Direct
No	4	F	Direct
No	4	S	Direct

Footnotes

Represents a weighted average sale price: the sales prices range from $66.40 to $66.41. Upon request, the full sale information regarding the number of shares sold at each price increment will be provided to the U.S. Securities and Exchange Commission, the issuer or a security holder of the issuer.
Exclusively represents shares withheld by the Company with respect to the payment of withholding tax liability incurred upon the vesting of Restricted Stock Units.
Represents a weighted average sale price: the sales prices range from $66.40 to $66.60. Upon request, the full sale information regarding the number of shares sold at each price increment will be provided to the U.S. Securities and Exchange Commission, the issuer or a security holder of the issuer.