AM Best has assigned a Financial Strength Rating of A++ (Superior) and a Long-Term Issuer Credit Rating of "aaa" (Exceptional) to Berkshire Hathaway International Insurance Limited (BHIIL) (United Kingdom). BHIIL is a wholly owned subsidiary of National Indemnity Company, the lead operating company of the National Indemnity Group (National Indemnity). The ultimate parent is Berkshire Hathaway Inc. (NYSE:BRK). The outlook assigned to these Credit Ratings (ratings) is stable.

The ratings of BHIIL reflect National Indemnity's consolidated balance sheet strength, which AM Best assesses as strongest, as well as its very strong operating performance, very favourable business profile and appropriate enterprise risk management.

The ratings of BHIIL reflect its key role within the National Indemnity group, which is further supported by common ownership and material reinsurance support from its parent company. BHIIL is one of the group's main platforms for accessing insurance business in the United Kingdom, Switzerland and Italy, as well as international business written in the London market.

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 specialising 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.

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Dale Kirby

Senior Financial Analyst

+44 20 7397 0276

dale.kirby@ambest.com

Ben Diaz-Clegg

Associate Director, Analytics

+44 20 7397 0293

ben.diaz-clegg@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