Allied World Assurance Company Holdings, Ltd., through its subsidiaries, operates as a specialty insurance and reinsurance company that underwrites a diversified portfolio of property and casualty lines of business worldwide. The company offers accident and health, casualty, construction and engineering, commercial motor, crisis management, environmental liability, pre-breach cyber risk management services/platform, healthcare liability, management and financial lines, marine, personal lines, professional liability/indemnity, property and energy, worker’s compensation, comprehensive insurance protection, and bespoke insurance products, as well as insurance solutions to protect small and medium-sized enterprises. It also provides reinsurance solutions comprising facultative, general casual treaty, marine and aviation treaty, professional liability treaty, property lines treaty, and specialty lines treaty products. The company was formerly known as Allied World Switzerland. The company was incorporated in 2001 and is based in Pembroke, Bermuda. Allied World Assurance Company Holdings, Ltd. operates as a subsidiary of 1102952 B.C. Unlimited Liability Company.