OLDWICK, N.J.–(BUSINESS WIRE)–A.M. Best has upgraded the Financial Strength Rating to B++ (Good) from B+ (Good) and the Long-Term Issuer Credit Ratings to “bbb” from “bbb-” of Wisconsin Reinsurance Corporation and its wholly owned subsidiary, 1st Auto & Casualty Insurance Company (1st Auto), collectively known as Wisconsin Reinsurance Group (WRG). All companies are domiciled in Madison, WI. The outlook of these Credit Ratings (ratings) has been revised to stable from positive. The rating