Warren Buffett’s Berkshire Hathaway has been steadily increasing its stake in Occidental Petroleum over the past nine trading sessions, bringing its ownership to nearly 29, according to regulatory filings. This positions Occidental as Berkshire's sixth-largest holding, making it its largest institutional investor. Buffett began investing in Occidental after being impressed by the company's earnings conference call, praising CEO Vicki Hollub's management. Occidental offers a 1.5 dividend yield and has maintained a stable stock price this year, following a 5 decline in 2023. Buffett took advantage of market volatility in early 2022 to acquire a significant portion of the company rapidly.