Warren Buffett has a large position in Sirius XM, which is down 44% so far this year.Warren Buffett is one of the most well-known investors in history. The Oracle of Omaha has made a fortune in the stock market, but Buffett's investing strategy is actually really simple.Buffett invests in blue-chip companies that generate strong, predictable cash flow. Some of the largest positions in Berkshire Hathaway's stock portfolio include Apple, American Express, and Coca-Cola.One company that you may be less familia ...