Allied World Assurance Company Holdings Ltd is a holding company. The Company provides property, casualty and specialty insurance and reinsurance solutions to clients around the world. It operates in three segments: North American Insurance, Global Markets Insurance and Reinsurance. It leases space in Australia, Bermuda, Canada, England, Hong Kong, Ireland, Labuan, Singapore and the United States. The North American Insurance segment consists of the Company's direct insurance operations in the United States, Bermuda and Canada. The Global Markets Insurance segment includes all of the Company's direct insurance operations outside of North America. The Reinsurance segment includes the reinsurance of property, general casualty, professional liability, specialty lines and property catastrophe coverage's, including property catastrophe coverage written by other reinsurance companies.