The Government Employees Insurance Company, usually known by the acronym GEICO, is an American auto insurance company. GEICO is a wholly owned subsidiary of Berkshire Hathaway and, as of 2006, provided coverage for more than 10 million motor cars, trucks and other motor vehicles owned by more than 7 million policy holders. GEICO writes private passenger automobile insurance in the District of Columbia and in all U.S. states except Massachusetts.