Berkshire Hathaway is a company mainly engaged in insurance business and has commercial activities in many other fields. The most important business is property and disaster insurance based on direct insurance and reinsurance amount. Berkshire Hathaway has many branches, including the sixth largest auto insurance company in the United States and GEICO, the tenth largest property/accident insurance company in the United States, with more than 4.7 million policyholders and 7.3 million insured cars; General Reinsurance Company is one of the four largest reinsurance companies in the world.

Berkshire Hathaway is an insurance kingdom with stocks, bonds, cash and silver, and it also owns many industrial companies. Berkshire Hathaway is a far-reaching investment holding company, and its shareholders' net assets rank first among all insurance companies in the world. In the Fortune 500 in 2009, Berkshire Hathaway ranked 4th1. In 20 10, Berkshire Hathaway ranked 28th, with operating income of1124.93 million USD and net profit of 8.055 billion USD.