 OLDWICK, N.J.--BUSINESS WIRE--AM Best has upgraded the Financial Strength Rating FSR to A Superior from A Excellent and the Long-Term Issuer Credit Ratings Long-Term ICRs to aa- from a of Old Republic National Title Insurance Company Tampa, FL and American Guaranty Title Insurance Company Oklahoma City, OK collectively referred to as Old Republic Title Insurance Group ORTIG. Concurrently, AM Best has affirmed the FSR of A Superior and the Long-Term ICRs of aa- of me 