Sydney Morning Herald | Buffett Ends $3.7 Billion Exxon Investment Amid Oil Plunge Bloomberg (Bloomberg) -- Warren Buffett's Berkshire Hathaway Inc. exited a $3.7 billion investment in Exxon Mobil Corp. amid a slump in oil prices. Crude has fallen by about half since June as U.S. production surged and the Organization of Petroleum Exporting ... Warren Buffett sells $4.7b Exxon stake in global oil rout Warren Buffett ditched Big Oil. Dumb move? What's behind Buffett's exit from Big Oil |