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Aspen Insurance Holdings to Present at the Keefe, Bruyette & Woods 2004 Insurance Conference on Sept

01 1 2004

Hamilton, Bermuda: 1 September 2004 -- Aspen Insurance Holdings (NYSE: AHL; BSX: AHL.BH), today announced that Julian Cusack, Chief Financial Officer, is scheduled to present at the Keefe, Bruyette & Woods Insurance Conference on Thursday, September 9, 2004 from 2:45 p.m. to 3:25 p.m. (ET). The event will be held at The Pierre Hotel in New York City.

A live webcast of the presentation can be accessed on Aspen's website at www.aspen.bm. After connecting to the home page, a link will be available to the conference presentation in the Investors section. Slides of the presentation will be posted on the company website for viewing shortly before the presentation begins. An archive of the webcast will be available for one month on Aspen's website starting on September 9.

About Aspen Insurance Holdings Limited

Aspen Insurance Holdings Limited (Aspen) 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 surplus lines insurance in the United States. Aspen's operations are conducted through its wholly owned subsidiaries located in London, Bermuda and the United States: Aspen Insurance UK Limited (Aspen Re), Aspen Insurance Limited (Aspen), Aspen Specialty Insurance Company (Aspen Specialty) and Aspen Re America Inc (Aspen Re America). Aspen's reinsurance segment consists of property reinsurance, casualty reinsurance and specialty reinsurance lines of business. Aspen's insurance segment consists of commercial property, commercial liability and U.S. surplus insurance lines of business. Aspen's principal existing shareholders include The Blackstone Group, Candover Partners Limited, Wellington Underwriting plc and Credit Suisse First Boston Private Equity.

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Investor Contacts:

Aspen Insurance Holdings Limited T +441-297-9382

Noah Fields, Head of Investor Relations

Julian Cusack, Chief Financial Officer

US Contacts:

The Abernathy MacGregor Group T +212-371-5999

Carina Thate

Jason Thompson

UK Contacts:

The Maitland Consultancy T +44 20 7379 5151

Emma Burdett

Brian Hudspith