AHL Aspen Insurance Holdings Limited Ordinary Shares

Aspen Insurance Holdings Limited (�Aspen�) (NYSE:AHL) will release its first quarter 2008 financial results on Wednesday, April 30, 2008, following the close of U.S. markets. The Company will hold a conference call to discuss its financial results on Thursday, May 1, 2008 at 8:30 a.m. (Eastern Time). The conference call will be webcast live in the �presentations� section of the Investor Relations page of Aspen's website, which is located at www.aspen.bm. The earnings press release and a detailed financial supplement will be posted to the website, as well as a brief slide presentation which may be used for reference during the earnings call. Investors may participate in the live conference call by dialing 888-459-5609 (toll-free domestic U.S.) or 973-321-1024 (international); conference ID: 40596535. Please call to register at least 10 minutes before the conference call begins. A replay of the call will be available for 10 days via telephone starting two hours following the end of the live call and can be accessed at 800-642-1687 (toll-free domestic U.S.) or 706-645-9291 (international); digital pin: 40596535. A replay will also be available for 10 days via Aspen�s website at www.aspen.bm. Aspen will hold its 2008 Investor Day in New York City on May 15th. For more information contact Noah Fields at noah.fields@aspen.bm. 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