Aspen Re Management Change

Aspen Insurance Holdings Limited (“Aspen” or the “Company”) (NYSE:AHL) announced today that Brian Boornazian has decided to retire as Chairman of its reinsurance segment, Aspen Re, and as Chief Executive Officer of Aspen Re, Americas, with effect from the end of April.

Chris O’Kane, Group Chief Executive Officer, said: “I would like to thank Brian for his outstanding service to Aspen over the last 14 years. Under his leadership and with his sharp focus on execution, we have grown our reinsurance business significantly and enhanced our highly-respected position in our chosen markets. He has also made a significant contribution to our executive management capabilities and I know that I speak for everyone at Aspen in wishing him every success in the future.

“We have an outstanding team at Aspen Re under the leadership of Thomas Lillelund and Emil Issavi and are well positioned to sustain the long-standing success of the business moving forward.”

Thomas Lillelund, Chief Executive Officer of Aspen Re, added: “I would like to add my thanks to Brian for his valuable advice and wise counsel as we worked together closely to grow our reinsurance business over the last few years.”

Mr. Boornazian’s role as Chairman of Aspen Re and Chief Executive Officer of Aspen Re, Americas, will not be replaced. Emil Issavi will continue to lead Aspen’s reinsurance business in the Americas in his capacity as President and Chief Underwriting Officer of Aspen Re.

Brian Boornazian commented: “I am immensely proud of what we have achieved during my time at Aspen and to see our reinsurance segment develop into the outstanding business that it is today. I would like to thank my colleagues and friends within Aspen for their huge support over many years and to wish them much success in the future.”

NOTES TO EDITORS:

About Brian Boornazian

Mr. Boornazian was appointed Chairman of Aspen Re and Chief Executive Officer of Aspen Re, North America, in August 2012. He was subsequently appointed Chief Executive Officer of Aspen Re, Americas, in May 2017, in addition to his role as Chairman. Prior to this, Mr. Boornazian had been the Chief Executive Officer of Aspen Re from January 2010 to August 2012 and President of Aspen Re from June 2008 until January 2010. Before that, he had been Head of Reinsurance from May 2006 until June 2008. Mr. Boornazian joined Aspen in January 2004.

Before joining Aspen, Mr. Boornazian was at XL Re America, where he acted in several capacities including Senior Vice President, Chief Property Officer responsible for property facultative and treaty, as well as marine, and the Chief Marketing Officer. He began his career in 1982 at Gen Re and also held senior positions at NAC Re, Cologne Re of America and Guy Carpenter.

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 Australia, Bermuda, Canada, Ireland, Singapore, Switzerland, the United Arab Emirates, the United Kingdom and the United States. For the year ended December 31, 2017, Aspen reported $12.9 billion in total assets, $6.7 billion in gross reserves, $2.9 billion in total shareholders’ equity and $3.4 billion in gross written premiums. Its operating subsidiaries have been assigned a rating of “A” by Standard & Poor’s Financial Services LLC (“S&P”), an “A” (“Excellent”) by A.M. Best Company Inc. (“A.M. Best”) and an “A2” by Moody’s Investors Service, Inc. (“Moody’s”).

Application of the Safe Harbor of the Private Securities Litigation Reform Act of 1995

This press release may contain written “forward-looking statements” within the meaning of the U.S. federal securities laws. 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,” “do not believe,” “project,” “anticipate,” “seek,” “will,” “estimate,” “may,” “likely,” “continue,” “assume,” “objective,” “aim,” “guidance,” “outlook,” “trends,” “future,” “could,” “would,” “should,” “target,” “on track” 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 press release, please see the “Risk Factors” section in Aspen’s Annual Report on Form 10-K for the year ended December 31, 2017 as filed with the U.S. Securities and Exchange Commission. Aspen undertakes no obligation to update or revise publicly any forward-looking statements, whether as a result of new information, future events or otherwise.

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