Aspen Insurance Holdings Ltd is a Bermudian insurance and reinsurance company. Its principal business is marketing and underwriting specialty insurance and reinsurance regularly. It comprises underwriting operations, which include risk-bearing insurance and reinsurance operations; Investing activities, which support underwriting operations; and ACM operations, which earn underwriting, management, and performance fees. It has two segments: Aspen Insurance and Aspen Reinsurance. Aspen Insurance consists of property and casualty insurance, marine, aviation, and energy insurance, and financial and professional lines insurance. Aspen Reinsurance comprises property catastrophe reinsurance, other property reinsurance, casualty reinsurance, and specialty reinsurance.