86% of Warren Buffett's $322 Billion Portfolio Is Invested in Only 8 Stocks By: Motley Fool March 24, 2023 at 05:06 AM EDT The Oracle of Omaha's long-term success has been dependent on portfolio concentration. Read More >> Related Stocks: American Express Apple Bank of America Berkshire Hathaway Berkshire Hathaway Chevron Corp Coca-Cola Company Kraft Heinz Company Moody's Corp Occidental Petroleum