OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has placed under review with developing implications the Financial Strength Rating (FSR) of A+ (Superior) and the Long Term Issuer Credit Ratings (Long-Term ICR) of “aa-” of Renaissance Reinsurance Ltd. (RenRe), Renaissance Reinsurance U.S. Inc. (RenRe U.S.), RenaissanceRe Specialty U.S. Ltd. (RenRe Specialty U.S. Ltd.), and Renaissance Reinsurance of Europe Unlimited Company (Dublin, Ireland). Additionally, A.M. Best has placed under review with develo