FILE - Warren Buffett, chairman and CEO of Berkshire Hathaway, smiles as he plays bridge following the annual Berkshire Hathaway shareholders meeting in Omaha, Neb., May 5, 2019. Buffett is giving away another $5.3 billion worth of Berkshire Hathaway stock to five foundations in accordance with his longtime giving plan. (AP Photo/Nati Harnik, File)