AM Best Assigns Credit Ratings to MACM Risk Retention Group, Inc. and Affirms Credit Ratings of Medical Assurance Company of Mississippi

AUGUST 27, 2026 02:00 PM (EDT)

AM Best Assigns Credit Ratings to MACM Risk Retention Group, Inc. and Affirms Credit Ratings of Medical Assurance Company of Mississippi

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FOR IMMEDIATE RELEASE

OLDWICK - AUGUST 27, 2026 02:00 PM (EDT)
AM Best has assigned a Financial Strength Rating (FSR) of A (Excellent) and a Long-Term Issuer Credit Rating (Long-Term ICR) of "a" (Excellent) to MACM Risk Retention Group, Inc. (MACM RRG) (District of Columbia). The outlook assigned to these Credit Ratings (ratings) is stable. Concurrently, AM Best has affirmed the FSR of A (Excellent) and the Long-Term ICR of "a" (Excellent) of Medical Assurance Company of Mississippi (MACM) (Ridgeland, MS). The outlook of these ratings is stable. These companies comprise MACM Group.

The ratings reflect MACM Group's balance sheet strength, which AM Best assesses as strongest, as well as its strong operating performance, limited business profile and appropriate enterprise risk management (ERM).

MACM Group's balance sheet strength assessment of strongest is driven by the strongest level of risk-adjusted capitalization, as measured by Best's Capital Adequacy Ratio (BCAR), stable surplus levels despite sizable unrealized losses at year-end 2022, and a conservative investment portfolio. The group's operating performance remains strong, driven by solid net investment income, which more than offsets some volatility in underwriting results, for strong pre-tax and net earnings in each of the past five years.

AM Best assesses MACM Group's business profile as limited, largely driven by the group's position as a mono-line and single-state organization that supports physicians. MACM RRG, an initially rated member of the group, was created in 2026 to facilitate measured expansion efforts within the group's region. The risk retention group will be heavily quota shared with its affiliated entity, MACM. AM Best assesses the group's ERM as appropriate for the size and scope of the organization. The stable outlooks reflect AM Best's expectation that MACM Group will maintain its overall balance sheet strength assessment, supported by risk-adjusted capitalization at the strongest level, while operating performance is expected to remain strong over the intermediate term primarily bolstered by solid investment returns.

This press release relates to Credit Ratings that have been published on AM Best's website. For all rating information relating to the release and pertinent disclosures, including details of the office responsible for issuing each of the individual ratings referenced in this release, please see AM Best's Recent Rating Activity web page. For additional information regarding the use and limitations of Credit Rating opinions, please view Guide to Best's Credit Ratings. For information on the proper use of Best's Credit Ratings (BCR), Best's Performance Assessments (PA), Best's Preliminary Credit Assessments (PCA) and AM Best press releases, please view Guide to Proper Use of Best's Ratings & Assessments.

AM Best is a global credit rating agency, news publisher and data analytics provider specializing in the insurance industry. Headquartered in the United States, the company does business in over 100 countries with regional offices in London, Amsterdam, Dubai, Hong Kong, Singapore and Mexico City.