Allied World Assurance Company Holdings, AG operates as a specialty insurance and reinsurance company in Bermuda, Hong Kong, Ireland, Singapore, Switzerland, the United Kingdom, and the United States. It offers casualty insurance products that provide coverage for specialty type risks, such as professional liability, environmental liability, product liability, inland marine liability, healthcare liability risks, and commercial general liability products, as well as professional liability products, including policies covering directors and officers, employment practices, and fiduciary liability insurance. The company also provides a mix of errors and omissions liability coverages for various service providers comprising law firms, technology companies, insurance companies, insurance agents and brokers, and municipalities; primary and excess liability, and other casualty coverages to the healthcare industry, including hospitals and hospital systems, managed care organizations, and medical facilities, such as home care providers, specialized surgery and rehabilitation centers, and outpatient clinics; and general casualty products for a range of industries consisting of construction, real estate, public entities, retailers, manufacturing, transportation, and finance and insurance services, as well as workers compensation insurance products. In addition, it offers property insurance products covering physical property and business interruption for commercial property risks; and general property products covering risks for retail chains, real estate, manufacturers, hotels and casinos, and municipalities. Further, the company provides the reinsurance of property, general casualty, professional liability, specialty lines, property catastrophe, accident and health, and marine and aviation coverages. Allied World Assurance Company Holdings, AG was founded in 2001 and is headquartered in Baar, Switzerland.