Warren Buffett's incredible stock-picking ability has propelled Berkshire Hathaway to market-beating returns for six decades. You don't need to be as skilled as Buffett to succeed in the stock market, because simple index funds can deliver spectacular long-term returns. Warren Buffett is the CEO of the Berkshire Hathaway holding company, where he oversees a number of wholly owned subsidiaries and a $281 billion portfolio of publicly traded stocks and securities.