By JOSH FUNK AP Business Writer OMAHA, Neb. (AP) — Warren Buffett’s company has bought up more than $11 billion worth of Occidental Petroleum stock this year, giving Berkshire Hathaway control of more than 20% of the oil producer. Occidental’s stock rose more than 3.5% on Tuesday to $62.18 after Buffett revealed his latest purchases of nearly 6.7 million Occidental …

HOUSTON (AP) — Occidental Petroleum Corp. (OXY) on Tuesday reported a first-quarter loss of $2.01 billion, after reporting a profit in the same period a year earlier. The Houston-based company said it had a loss of $2.49 per share. Losses, adjusted for non-recurring costs, were 52 cents per share. The results missed Wall Street expectations. The average estimate of nine …

Occidental Petroleum Corporation Thursday announced the successful completion of its acquisition of Anadarko Petroleum Corporation a in a transaction valued at $55 billion, including the assumption of Anadarko’s debt. “With Anadarko’s world-class asset portfolio now officially part of Occidental, we begin our work to integrate our two companies and unlock the significant value of this combination for shareholders,” said Vicki Hollub, President …