Few people command the attention of Wall Street professionals and everyday investors quite like billionaire Warren Buffett. Since taking the reins of Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) in 1965, the Oracle of Omaha, as he's come to be known, has created more than $615 billion in value for shareholders and generated an aggregate return on his company's Class A shares (BRK.A) of 3,641,613%. In other words, there's plenty of reason for Wall Street and investors to pay attention to what Buffett is buying, selling, and holding.