AHL Aspen Insurance Holdings Limited Ordinary Shares

Aspen Insurance Holdings Limited (the �Company�) (NYSE:AHL) today announced the appointment of Matthew Yeldham as Head of International Insurance. This is a new role within the Company. Matt is currently Deputy Chief Underwriting Officer for the Lloyd�s business at Catlin, a position he assumed when Wellington Underwriting plc was acquired by Catlin in 2006. Matt will be responsible for all specialty and insurance products sold outside the United States. Matt joined Wellington in 1992 and began his underwriting career in Lloyd�s Syndicate 672 IC Agnew and Others. He was named Underwriting Director responsible for Casualty and Marine Underwriting in 2001 and became Deputy Chief Underwriting Officer in 2006. Wellington was acquired by Catlin in 2006. Matt will be based in the Company�s London office and will assume his role in October 2007. He will report directly to Aspen�s Chief Executive Officer, Chris O�Kane. Chris O�Kane, CEO of Aspen said: �I have known Matt for many years and am delighted he has chosen to join Aspen. I look forward to working with him again.� Matt Yeldham said: �I have the highest regard for Chris and the Aspen team, and am excited by the opportunity to contribute to Aspen�s growth in the insurance business.� 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. 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.