Billionaire value investor Warren Buffett’s Omaha-based investment giant, Berkshire Hathaway, announced on Thursday, 2 October 2025, its plans to acquire Occidental Petroleum’s chemical business, OxyChem, according to an official release. The shares of the energy firm jumped over 2% during the pre-market trading session on Thursday.
Occidental Petroleum shares jumped 2.68% to $49 during the pre-market session on the New York Stock Exchange (NYSE), compared to $47.72 at the previous market close.
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