Geico is most important company in the Berkshire Hathaway portfolio, and is wholly owned by Berkshire Hathaway.
The insurance business is Berkshire's primary business, and all the cash generated from premiums (the float), which is just theirs to do with what they please until claims come in, is what has allowed it to invest and buy other businesses.
The insurance business is Berkshire's primary business, and all the cash generated from premiums (the float), which is just theirs to do with what they please until claims come in, is what has allowed it to invest and buy other businesses.