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Allied World Assurance Holdings, Ltd (Holdings) is a specialty insurance and reinsurance company that underwrites a portfolio of property and casualty insurance and reinsurance lines of business. The Company writes direct property and casualty insurance, as well as reinsurance through its operations in Bermuda, the United States, Ireland and the United Kingdom. Holdings' operates in three business segments: property insurance, casualty insurance and reinsurance. The property segment includes the insurance of physical property and business interruption coverage for commercial property and energy-related risks. The casualty segment specializes in insurance products providing coverage for general and product liability, professional liability and healthcare liability risks. The reinsurance segment includes the reinsurance of property, general casualty, professional lines, specialty lines and catastrophe coverages written by other insurance companies.