Warren Buffett Backs Occidental’s Bid for Anadarko With $10 Billion Investment. Mergers, Acquisitions and Divestitures, Berkshire Hathaway Inc, Occidental Petroleum Corporation, Chevron Corporation, Buffett, Warren E, ANADARKO PETROLEUM CORP, Stocks and Bonds, Oil (Petroleum) and Gasoline, Hollub, Vicki (1960- )