Aspen Insurance Holdings Limited to Announce Second Quarter 2006 Results on July 26, 2006 and Host Conference Call on July 27, 2006

Hamilton, Bermuda: June 28, 2006 - Aspen Insurance Holdings Limited (Aspen) (NYSE:AHL; BSX:AHL.BH) will release its second quarter 2006 financial results on Wednesday, July 26, 2006, following the closing of the U.S. markets.  The Company will hold a conference call to discuss its financial results on Thursday, July 27, 2006 at 8:30 a.m. (Eastern Time).

The conference call will be webcast live on the €˜Investor Relations' section 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. 

Chris O'Kane, Chief Executive Officer, and Julian Cusack, Chief Financial Officer, will review Aspen's second quarter 2006 financial results.  Following their review, questions will be taken from registered analysts and investors.  The conference call is expected to last approximately one hour. 

Investors may participate in the live conference call by dialing 877-412-8086 (toll-free domestic U.S.) or 973-582-2842 (international); conference ID: 7559625.  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 approximately two hours following the live call on July 27, 2006, and can be accessed at 877-519-4471 (toll-free domestic U.S.) or 973-341-3080 (international); digital pin: 7559625. A replay will also be available for 10 days via Aspen's website at www.aspen.bm.

About Aspen Insurance Holdings Limited

Aspen Insurance Holdings Limited was established in June 2002.  Aspen is a Bermudian holding company that provides property and casualty reinsurance in the global market, property and liability insurance principally in the United Kingdom and the United States and specialty insurance and reinsurance consisting mainly of marine and energy and aviation worldwide. Aspen's operations are conducted through its wholly-owned subsidiaries located in London, Bermuda and the United States: Aspen Insurance UK Limited, Aspen Insurance Limited and Aspen Specialty Insurance Company. Aspen has four operating segments: property reinsurance, casualty reinsurance, specialty insurance and reinsurance and property and casualty insurance. Aspen's principal existing founding shareholders include The Blackstone Group, Candover Partners Limited and Credit Suisse First Boston Private Equity.  For more information about Aspen, please visit the Company's website at www.aspen.bm.  

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Aspen Insurance Holdings Limited                      T  441-297-9382

Noah Fields, Head of Investor Relations