AHL Aspen Insurance Holdings Limited Ordinary Shares

Aspen Insurance Holdings Limited (�Aspen�) (NYSE:AHL) today announced that it will host its 2008 Investor Day on Thursday, May 15, 2008 from 8:30 a.m. to 3:00 p.m. (ET) in New York City. Aspen�s senior management will conduct presentations on corporate strategy, underwriting fundamentals, risk management, and provide a detailed review of the Company�s product groups. All presentations, including question and answer sessions, will be webcast live. This will be available via Aspen�s website (www.aspen.bm) in the �Presentations� page of the �Investor Relations� section. The slide presentations for the Investor Day will also be posted on the �Presentations� page of the �Investor Relations� section of the website. The webcast will be archived and a replay will be available for approximately four weeks following the live presentation. 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, and Switzerland. 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. Aspen's Ratings Aspen Insurance UK Limited Aspen Insurance Limited A (Strong) Standard & Poor's A (Strong) Standard & Poor's A (Excellent) A.M. Best A (Excellent) A.M. Best A2 (Good) Moody's A2 (Good) Moody's � Aspen Specialty Insurance Company A- (Excellent) A.M. Best