OLDWICK, N.J.--(BUSINESS WIRE)--A.M. Best has placed under review with negative implications the financial strength rating of A (Excellent) and the issuer credit ratings (ICR) of “a” of Ironshore Insurance Ltd. (Bermuda) and its affiliated operating companies: Ironshore Indemnity Inc. (Minneapolis, MN), Ironshore Specialty Insurance Company (Phoenix, AZ) and Ironshore Europe Limited (Ireland) (collectively referred to as Ironshore). Concurrently, A.M. Best also has placed under review with nega