AHL Aspen Insurance Holdings Limited Ordinary Shares

Aspen Insurance Holdings Limited (�Aspen�) (NYSE:AHL) will release its second quarter 2008 financial results on Wednesday, July 30, 2008, following the close of U.S. markets. The Company will hold a conference call to discuss its financial results on Thursday, July 31, 2008 at 8:30 a.m. (Eastern Time). Conference Call Participation Details - July 31, 2008 at 8:30 a.m. (EST) � Participant Dial-In Numbers: +1 (888) 459-5609 (US Toll Free) +1 (973) 321-1024 (International) Conference ID: 51488921 Please call to register at least 10 minutes before the conference call begins. 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. Replay Details � A replay of the call will be available for 10 days via telephone and Internet starting two hours following the end of the live call. Replay Access: +1 (800) 642-1687 (US Toll Free) +1 (706) 645-9291 (International) www.aspen.bm Replay ID: 51488921 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. 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