AM Best Upgrades Union Mutual Rating to Excellent with Stable Outlook May 4, 2021 AM Best has upgraded the financial strength rating to A (excellent) from A- (excellent) and the long-term issuer credit ratings to “a” from “a-” of Union Mutual Fire Insurance Company, the lead property/casualty company and its wholly owned subsidiary, New England Guaranty Insurance Company Inc., as well as its mutual affiliate, Community Mutual Insurance Company, which are collectively referred to as Union Mutual of Vermont Companies. Union Mutual Fire and New England Guaranty are domiciled in Montpelier, Vermont, while Community Mutual is domiciled in Latham, New York. The outlook of these credit ratings was revised to stable from positive.