4.Berkshire Hathaway:

A name in the corporate industry that is hard to forget Berkshire Hathaway was established back in 1889 and has a number of subsidiaries that work to provide a number of different services including retail, railroad, vacuum cleaners, confectionery and much more. The companies that provide insurance are Berkshire Hathaway Reinsurance Group, GEICO, Berkshire Hathaway Primary Group, General Re, National Indemnity Company, Medical Protective Company, Applied Underwriters, U.S. Liability Insurance Company, Central States Indemnity Company and the Guard Insurance Group. Berkshire’s US based insurers alone generated about $245 billion in 2020.