OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has affirmed the Financial Strength Rating (FSR) of A (Excellent) and the Long-Term Issuer Credit Ratings (Long-Term ICR) of “a” of the rated operating subsidiaries of James River Group Holdings, Ltd. (JRG Holdings) [NASDAQ:JRVR]. In addition, A.M. Best has affirmed the Long-Term ICR of “bbb” of JRG Holdings. JRG Holdings is domiciled in Pembroke, Bermuda, while its subsidiaries are based in Pembroke, Richmond, VA, and Raleigh, NC. The outlook of these