Key Points Only 10 publicly traded U.S. companies have market caps of at least $1 trillion. Most stocks in this club are part of the high-flying artificial intelligence sector. Buffett and his team have been buying one stock that just joined the$1 trillion club without being an AI play. 10 stocks we like better than Berkshire Hathaway › When he retires as the chief executive officer of Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) in just a few short months, Warren Buffett is likely to go down a ...