-

AM Best Affirms Credit Ratings of United States Liability Insurance Company and Its Subsidiaries

OLDWICK, N.J.--(BUSINESS WIRE)--AM Best has affirmed the Financial Strength Rating of A++ (Superior) and the Long-Term Issuer Credit Ratings of “aa+” (Superior) of United States Liability Insurance Company (USLI) and its subsidiaries: Mount Vernon Fire Insurance Company; U.S. Underwriters Insurance Company (Bismarck, ND); Mount Vernon Specialty Insurance Company; and Radnor Specialty Insurance Company. The outlook of these Credit Ratings (ratings) is stable. All companies are domiciled in Omaha, NE, unless otherwise specified.

The ratings reflect the insurance operating companies’ consolidated balance sheet strength, which AM Best assesses as strongest, as well as their very strong operating performance, neutral business profile and appropriate enterprise risk management (ERM).

These assessments are evidenced by USLI’s long and stable record of profitable underwriting and overall investment returns, superior risk-adjusted capital position, relevant market presence and conservative reserve positions. Additional positive rating factors include a high level of diversification in the companies’ books of business with regard to concentration limits, sales channels, rate flexibility, proactive claims management philosophy and commitment to customer service. Furthermore, these ratings continue to benefit from implicit support provided to USLI and its subsidiaries by their ultimate parent, Berkshire Hathaway Inc. (Berkshire) [NYSE: BRK-A and BRK-B], and explicit support from their affiliate, National Indemnity Company.

The explicit support for USLI is in the form of significant reinsurance treaties with National Indemnity Company, a Berkshire subsidiary. The implicit support for USLI is in the form of investment management services and ERM supervision, both provided by Berkshire. In addition to these factors, Berkshire has established a long-term history of supporting its member companies.

Last year, USLI’s common stock portfolio presented a significant recovery from the previous year’s unrealized losses, as the stock market closed the year with steep gains. Unrealized investment gains were the largest component of the increase in surplus. The companies’ risk-adjusted capitalization, as measured by Best’s Capital Adequacy Ratio (BCAR), continues to be well into the strongest range, providing ample cushion to absorb occasional volatility in the capital markets. USLI’s underwriting income was the largest in the past 10 years, and was also a significant contributor to the companies’ surplus.

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, Best’s Performance Assessments, Best’s Preliminary Credit Assessments 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. For more information, visit www.ambest.com.

Copyright © 2024 by A.M. Best Rating Services, Inc. and/or its affiliates. ALL RIGHTS RESERVED.

Contacts

Guilherme Monteiro Simoes, CFA
Senior Financial Analyst
+1 908 882 2317
guy.simoes@ambest.com

Gregory Dickerson
Director
+1 908 882 1737
gregory.dickerson@ambest.com

Christopher Sharkey
Associate Director, Public Relations
+1 908 882 2310
christopher.sharkey@ambest.com

Al Slavin
Senior Public Relations Specialist
+1 908 882 2318
al.slavin@ambest.com

AM Best


Release Versions
Hashtags

Contacts

Guilherme Monteiro Simoes, CFA
Senior Financial Analyst
+1 908 882 2317
guy.simoes@ambest.com

Gregory Dickerson
Director
+1 908 882 1737
gregory.dickerson@ambest.com

Christopher Sharkey
Associate Director, Public Relations
+1 908 882 2310
christopher.sharkey@ambest.com

Al Slavin
Senior Public Relations Specialist
+1 908 882 2318
al.slavin@ambest.com

Social Media Profiles
More News From AM Best

AM Best Upgrades Credit Ratings of FuSure Reinsurance Company Limited

HONG KONG--(BUSINESS WIRE)--AM Best has upgraded the Financial Strength Rating to A (Excellent) from A- (Excellent) and the Long-Term Issuer Credit Ratings to “a” (Excellent) from “a-” (Excellent) of FuSure Reinsurance Company Limited (FuSure) (Hong Kong). The outlook of these Credit Ratings (ratings) is stable. The ratings reflect FuSure’s balance sheet strength, which AM Best assesses as very strong, as well as its adequate operating performance, neutral business profile and appropriate enter...

AM Best to Hold Analytical Briefing on Shifting Directors and Officers Insurance Market Landscape

OLDWICK, N.J.--(BUSINESS WIRE)--AM Best will hold an analytical briefing on the U.S. directors and officers (D&O) insurance market, scheduled for Tuesday, June 23, 2026, at 2:00 p.m. EDT. The D&O insurance landscape continues to face mounting external pressures, including geopolitical instability, economic volatility, regulatory uncertainty and sustained soft market conditions. These dynamics are reshaping corporate risk profiles and influencing how organizations, boards and insurers as...

AM Best to Present Results of Survey on Insurers’ Artificial Intelligence Adoption to Society of Insurance Research’s Members

OLDWICK, N.J.--(BUSINESS WIRE)--AM Best will deliver a presentation based on its recent survey of insurance companies on the pace of artificial intelligence (AI) adoption to the Society of Insurance Research’s (SIR) members on June 11, 2026. Sridhar Manyem, senior director, Industry Research and Analytics, AM Best, will lead the session, which is titled, “Adoption and Deployment of AI: AM Best Survey Results.” To gauge the impact of AI on the insurance industry, AM Best conducted a survey of it...
Back to Newsroom