Berkshire Hathaway purchased an additional 2.57 million shares of Occidental Petroleum’s common stock between June 5 and June 7, according to a U.S. securities filing. The investment amounts to over $150 million, increasing Berkshire’s stake in the energy company to about 250.6 million shares. Occidental Petroleum’s shares closed at $59.48 on Friday, according to Benzinga Pro. As of March, Berkshire held a roughly 28% stake in the company. . . #occidentalpetroleum