Warren Buffett’s Berkshire Hathaway increased its stake in Occidental Petroleum Corp. to about 25% over the past week.
According a filing Tuesday with the Securities and Exchange Commission, Berkshire bought 4.66 million shares of Occidental between May 25 and May 30, at prices ranging from $58.30 to $58.85 a share, roughly $275 million in all.
That…
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