Warren Buffett walks the floor and meets with Berkshire Hathaway shareholders ahead of their annual meeting in Omaha, Nebraska on May 3rd, 2024. Warren Buffett's Berkshire Hathaway has scooped up more shares of Occidental Petroleum over each of the past nine trading sessions, driving his gigantic stake in the Houston-based oil and gas producer to almost 29%, according to regulatory filings. The Omaha, Nebraska-based conglomerate purchased Occidental shares every trading day from June 5 to Monday, totaling a ...