FILE - Warren Buffett, chairman and CEO of Berkshire Hathaway, smiles as he plays bridge following the annual Berkshire Hathaway shareholders meeting in Omaha, Neb., on May 5, 2019. Berkshire Hathaway now owns nearly $11 billion worth of Occidental Petroleum stock after buying another 1.9 million shares in the past week. The latest purchases of nearly $117 million in stock that Berkshire reported to the Securities and Exchange Commission on Monday, July 18, 2022, give the Omaha, Nebraska-based conglomerate control of 19.4% of the oil producer's stock. (AP Photo/Nati Harnik, File)