PEMBROKE, Bermuda, August 8, 2010 - Allied World Assurance Company Holdings, Ltd (NYSE: AWH) today reported that the company has repurchased US$250 million of its common shares from certain GS Capital Partners and other investment funds, which are affiliates of The Goldman Sachs Group, Inc. and founding shareholders of Allied World. Allied World has repurchased five million common shares at US$50 per share, representing approximately a 0.5% discount to the company's closing stock price of US$50.23 on August 6, 2010. The repurchase represents approximately 9.4% of the diluted common shares outstanding as of June 30, 2010. Following the repurchase, these affiliates of The Goldman Sachs Group, Inc. hold approximately 3.16 million non-voting shares of Allied World, or approximately 7.2% of the company's total common shares issued and outstanding. The repurchase has been executed separately from the company's US$500 million share repurchase program that was authorized by its Board of Directors in May 2010. This transaction was funded using available cash on hand.

PEMBROKE, Bermuda, August 8, 2010 - Allied World Assurance Company Holdings, Ltd (NYSE: AWH) today reported that the company has repurchased US$250 million of its common shares from certain GS Capital Partners and other investment funds, which are affiliates of The Goldman Sachs Group, Inc. and founding shareholders of Allied World. Allied World has repurchased five million common shares at US$50 per share, representing approximately a 0.5% discount to the company's closing stock price of US$50.23 on August 6, 2010. The repurchase represents approximately 9.4% of the diluted common shares outstanding as of June 30, 2010. Following the repurchase, these affiliates of The Goldman Sachs Group, Inc. hold approximately 3.16 million non-voting shares of Allied World, or approximately 7.2% of the company's total common shares issued and outstanding. The repurchase has been executed separately from the company's US$500 million share repurchase program that was authorized by its Board of Directors in May 2010. This transaction was funded using available cash on hand.