OLDWICK, N.J.--(BUSINESS WIRE)--A.M. Best has affirmed the financial strength rating (FSR) of A (Excellent) and the issuer credit ratings (ICR) of "a+" of the pooled members of Western World Insurance Group (Western World). Western World is ultimately owned by Validus Holdings Ltd. (Validus) (Hamilton, Bermuda) [NYSE:VR]. Validus completed its acquisition of Western World on Oct. 2, 2014. Validus' flagship company is Validus Reinsurance Ltd., which maintains the FSR of A (Excellent) and an ICR