OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has downgraded the Financial Strength Rating to A- (Excellent) from A (Excellent) and the Long-Term Issuer Credit Rating to “a-” from “a” of 21st Century National Insurance Company (21st Century National) (headquartered in Boston, MA), following the announcement of its acquisition by Plymouth Rock Assurance Corporation (PRAC) on April 1, 2018. Additionally, A.M. Best has placed these Credit Ratings (ratings) under review with developing implications. Th
