Aspen Insurance Holdings Limited, through its subsidiaries, engages in insurance and reinsurance businesses in the United States and internationally. The company's Aspen Insurance segment offers property and casualty insurance products, including U.S. and U.K. commercial property, commercial liability, U.S. primary casualty, excess casualty, environmental liability, and railroad liability products; and marine, aviation, and energy insurance products, such as marine and energy liability, onshore and offshore energy physical damage, marine hull, specie, inland and ocean marine, and aviation insurance products. This segment also provides financial and professional lines insurance products comprising financial and corporate risks, professional liability, management liability, credit and political risks, crisis management, accident and health, surety risks, and technology liability insurance products. The company's Aspen Reinsurance segment offers property catastrophe reinsurance products; other property reinsurance products; casualty reinsurance products, including U.S. treaty, international treaty, and casualty facultative reinsurance products; and specialty reinsurance products comprising credit and surety, agriculture, marine, aviation, terrorism, engineering, cyber, and other specialty lines. Aspen Insurance Holdings Limited distributes its products primarily through brokers and reinsurance intermediaries. The company was founded in 2002 and is headquartered in Hamilton, Bermuda.