OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has upgraded the Long-Term Issuer Credit Rating (Long-Term ICR) to “bbb+” from “bbb” and affirmed the Financial Strength Rating (FSR) of B++ (Good) of Spartan Insurance Company (Spartan) (Pearland, TX). The outlook of the FSR has been revised to positive from stable, while the outlook of the Long-Term ICR remains positive. The rating actions reflect the continuation of Spartan’s favorable operating performance, minimal liabilities and continued surplus