LONDON--(BUSINESS WIRE)--A.M. Best has affirmed the financial strength ratings (FSR) of A+ (Superior) and the issuer credit ratings (ICR) of “aa-” of Allianz SE (Allianz) (Germany) and most of its A.M. Best rated subsidiaries. In addition, A.M. Best has upgraded the FSR to A+ (Superior) from A (Excellent) and the ICR to “aa-” from “a” of Fireman’s Fund Insurance Company (Fireman’s Fund) (Novato, CA) and its reinsured affiliates, collectively referred to as FFIC. Furthermore, A.M. Best has upgra