The Company was incorporated under the laws of Bermuda on 23rd May, 2002 as Exali Reinsurance Holdings Limited and subsequently changed its name to Aspen Insurance Holdings Limited on 22nd November 2002. The Ordinary Shares began trading on the New York Stock Exchange (NYSE) on 4th December, 2003 under the symbol `AHL'. The BSX listing is a secondary listing and is effective from 10th May, 2004.

Aspen provides reinsurance and insurance coverage to clients in various domestic and global markets through wholly-owned subsidiaries and offices in Australia, Bermuda, Canada, France, Germany, Ireland, Singapore, Switzerland, the United Arab Emirates, the United Kingdom and the United States. For the year ended December 31, 2015, Aspen reported $11.0 billion in total assets, $4.9 billion in gross reserves, $3.4 billion in total shareholders’ equity and $3.0 billion in gross written premiums. Its operating subsidiaries have been assigned a rating of “A” by Standard & Poor’s Financial Services LLC, an “A” (“Excellent”) by A.M. Best Company Inc. and an “A2” by Moody’s Investor Service, Inc.