Allied World Assurance Company Holdings assures its clients that everything is well insured. In the US its insurance products include general property/casualty coverage as well as specialty products such as environmental, health care, and professional liability coverage targeted to small and mid-market clients. Its Bermuda-based international insurance operations serve larger companies based in North America but doing business abroad, while its European and Asian offices serve non-US based companies. Its Allied World Reinsurance business provides a mix of reinsurance coverage to US insurance companies. Allied World's 2011 plans to merge with reinsurer Transatlantic Holding were terminated by mutual agreement.