Warren Buffett is known for his investing success, generating market-beating returns over the long run. As chairman, he's helped Berkshire Hathaway deliver a compounded annual gain of more than 19% over 58 years -- that's as the S&P 500 posted a compounded increase of about 10% during that period.

Despite once calling Apple the "best business" in the world, Buffett sold 100 million shares in the third quarter, cutting Berkshire's stake by 25%. And while Apple still ranked as the company's largest holding as of Sept. 30, Buffett has now sold more than 615 million shares in the last four quarters.

Warren Buffett is one of the most well-known investors in the world. The billionaire CEO of Berkshire Hathaway has an enviable track record of outperforming the S&P 500 index and is fond of