AHL Aspen Insurance Holdings Limited Ordinary Shares

Aspen Insurance Holdings Limited (the �Company�) (NYSE:AHL) today announced that Nathan Warde has joined as President of Aspen Insurance U.S., with immediate effect. In this newly formed role, Nathan reports directly to Chris O�Kane, Aspen�s Chief Executive Officer, and is responsible for leading the Company�s insurance operations in the United States and the strategic development of Aspen�s Excess and Surplus lines (�E&S�) business. Nathan Warde joins Aspen from Arch Capital Group Ltd. where he was Executive Vice President, Worldwide Property, with responsibility for the entire property product including Arch's�E&S operations and Global Property operations in the USA and Europe. He has over 20 years of property and casualty insurance experience. �I am extremely pleased that Nathan has joined our team,� said Chris O�Kane, Chief Executive Officer of Aspen. �He has a strong track-record in E&S underwriting and brings significant expertise to our U.S. insurance operations. I believe that under his leadership we will be able to take our E&S business into its next phase of development and benefit from what I see as excellent opportunities in this market. I look forward to working closely with Nathan to leverage our strategic platform in the U.S. and support the growth of our insurance business in this key geography.� Nathan Warde said, �I have the highest regard for Chris and the Aspen team and look forward to leading the U.S. Insurance focus for the Company. This is an exciting opportunity which I welcome.� Prior to joining Arch in 2002, Nathan Warde worked with Royal Specialty Underwriting, Inc. (RSUI) where he opened a branch office in 1992 and was team leader of an underwriting unit writing in excess of $160 million in premium. Prior to RSUI, Nathan held positions at NRG America and Hartford Insurance Group. He is a Chartered Property Casualty Underwriter (CPCU) and holds the following designations: Associate in Reinsurance (ARe), Associate in Loss Control Management (ALCM), Associate in Marine Insurance Management (AMIM), Associate in Risk Management (ARM) and Certificate in General Insurance. Mr. Warde holds a Bachelor of Arts degree from the University of California with majors in Economics and Political Science. About Aspen Insurance Holdings Limited Aspen is a Bermudian holding company providing 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. For more information about Aspen, please visit the Company�s website at www.aspen.bm. Application of the Safe Harbor of the Private Securities Litigation Reform Act of 1995 This press release contains written, and Aspen's officers may make related oral, "forward-looking statements" within the meaning of the U.S. federal securities laws regarding the appointment of new hires and the direction and growth of the Company. These statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include all statements that do not relate solely to historical or current facts, and can be identified by the use of words such as "expect," "intend," "plan," "believe," "project," "anticipate," "seek," "will," "estimate," "may," "continue," and similar expressions of a future or forward-looking nature. All forward-looking statements rely on a number of assumptions, estimates and data concerning future results and events and are subject to a number of uncertainties and other factors, many of which are outside Aspen's control that could cause actual results to differ materially from such statements. For a detailed description of uncertainties and other factors that could impact the forward-looking statements in this release, please see the "Risk Factors" section in Aspen's Annual Report on Form 10-K for the year ended December 31, 2006, filed with the U.S. Securities and Exchange Commission on February 22, 2007.