Aspen Insurance Holdings Limited, through its subsidiaries, engages in insurance and reinsurance businesses worldwide. Its Insurance segment offers property and casualty insurance, including U.S. and the United Kingdom commercial property and construction business, commercial liability, U.S. specialty casualty, excess casualty, environmental liability, and programs business; and marine and energy liability, onshore and offshore energy physical damage, marine hull, specie, inland marine and ocean risks, and aviation insurance products. This segment also provides financial and professional lines insurance products against financial and corporate risks, professional liability, management liability, credit and political risks, accident and specialty risks, and surety risks. The company’s Reinsurance segment offers property catastrophe reinsurance; other property reinsurance, such as property, engineering and construction, risks excess of loss and proportional treaty reinsurance, and facultative or single risk reinsurance; and casualty reinsurance, including the United States (U.S.) treaty, international treaty, and casualty facultative reinsurance. This segment also provides specialty reinsurance comprising credit and surety, agriculture, marine, aviation, terrorism, engineering, and other specialty lines. The company distributes its products primarily through brokers and reinsurance intermediaries. Aspen Insurance Holdings Limited was founded in 2002 and is based in Hamilton, Bermuda.