Berkshire Hathaway, founded in 1956 by Warren Buffett, is a company whose main business is insurance and which also has business activities in many other areas. The most important of these businesses is property and casualty insurance based on direct premiums and reinsurance amounts. Berkshire Hathaway has a number of subsidiaries, including: GEICO, the sixth largest auto insurer in the United States; and General Re, one of the four largest reinsurers in the world.
