Warren Buffett — the Oracle of Omaha — is widely regarded as one of the greatest investors of all time. Berkshire Hathaway Inc. (NYSE: BRK-A) has returned tens of thousands of percent over the years and consistently outperforms the market. Buffett purchased the company for just $8.3 million in 1965, and it’s now valued at nearly $700 billion, roughly a 10 million percent return. But one of Buffett’s top all-time picks and longest-held positions is one you might not expect. Berkshire Hathaway fir