A.M. Best has upgraded the financial strength rating (FSR) to A+ (Superior) from A (Excellent) and the issuer credit ratings (ICR) to “aa-“ from “a+” of Transatlantic Reinsurance Company, TransRe Zurich Ltd., TransRe London Limited, Fair American Insurance and Reinsurance Company and Fair American Select Insurance Company. The outlook of each rating has been revised to stable from positive.