Oklahoma’s CompSource Mutual Insurance Assigned ‘A’ Rating by AM Best December 11, 2020 The outlook assigned to these ratings is stable. The ratings reflect the monoline workers’ compensation insurer’s balance sheet strength, which AM Best categorizes as strongest, as well as its adequate operating performance, limited business profile and appropriate enterprise risk management. CompSource Mutual’s risk-adjusted capitalization, as measured by Best’s Capital Adequacy Ratio (BCAR), is categorized as strongest. The balance sheet strength assessment also considers the company’s underwriting leverage ratios, which compare favorably with the workers’ comp composite, low reinsurance dependence with a high quality reinsurance panel, and a diverse investment portfolio with investment leverage metrics that are below the WC composite.