AHL Aspen Insurance Holdings Limited Ordinary Shares

Aspen Insurance Holdings Limited (the �Company�) (NYSE:AHL) today announced that its Board of Directors declared a quarterly cash dividend on its ordinary shares of US$0.15 per ordinary share. The dividend is payable on August 27, 2008 to the holders of record as of the close of trading on August 12, 2008. The Company�s Board of Directors also declared a cash dividend on its Perpetual Preferred Income Equity Replacement Securities (�Perpetual PIERS�) of US$0.703125 per Perpetual PIER. The dividend is payable on October 1, 2008 to the holders of record as of the close of business on September 15, 2008. The Company�s Board of Directors declared a dividend on the 7.401% Perpetual Non-Cumulative Preference Shares (�Perpetual Preference Shares�) of US$0.462563 per Perpetual Preference Share, payable on October 1, 2008 to the holders of record as of the close of business on September 15, 2008. About Aspen Insurance Holdings Limited Aspen provides reinsurance and insurance coverage to clients in various domestic and global markets through wholly-owned subsidiaries and offices in Bermuda, France, Ireland, the United States, the United Kingdom, Switzerland and Singapore. For the year ended December 31, 2007, Aspen reported gross written premiums of $1.8 billion, net income of $489.0 million and total assets of $7.2 billion. For more information about Aspen, please visit www.aspen.bm.