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 July 1, 2008 to the holders of record as of the close of business on June 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 July 1, 2008 to the holders of record as of the close of business on June 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, 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.

-Ends-

Contact:

Aspen Insurance Holdings Limited                           

Tania Kerno, Head of Communications           T 44 20 7184 8855

Noah Fields, Head of Investor Relations               T (441) 297-9382