AM Best upgrades W. R. Berkley and subsidiaries’ Issuer Credit Ratings
AM Best announces that it has upgraded the Long Term Issuer Rating (Long Term ICR) of securities issued by WR Berkley Corporation (WR Berkley) from ‘a-‘ (Excellent) to ‘a’ (Excellent), as well as all related Long-Term Issue Ratings (Long-Term IR) and Indicative Long-Term IR. AM Best also upgraded the Long-Term ICR to “aa” (Superior) from…