OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has removed from under review with positive implications and upgraded the Long-Term Issuer Credit Ratings (Long-Term ICR) to “a+” from “a” and affirmed the Financial Strength Rating of A (Excellent) of Atlantic Specialty Insurance Company (Atlantic Specialty) (New York, NY) and its rated affiliates. Collectively, these companies are referred to as OneBeacon Insurance Group (OneBeacon). Concurrently, A.M. Best has removed from under review with positive
