CEO Rex Tillerson

SAN FRANCISCO (MarketWatch)-- Berkshire Hathaway Inc. , Warren Buffett's conglomerate, disclosed in a regulatory filing late Tuesday that it sold its position in Exxon Mobil Corp. and added to stakes in IBM and Intel Corp. . Berkshire also disclosed new holdings in Class-A shares of Liberty Media Corp. and DaVita Inc. , a San Francisco-based provider of kidney dialysis treatment. The filing, which displays Berkshire's portfolio as of Dec...  

U.S. energy giant Exxon Mobil Corp. (>> Exxon Mobil Corporation) will be barred from Iraq's fourth oil-and-gas licensing auction, scheduled for May, because of the deals it struck with the country's semi-autonomous Kurdistan region, a spokesman for Iraq's ...  

China’s ambitions to unlock the natural gas trapped in shale rocks are likely to take longer than planned, boosting the nation’s reliance on overseas suppliers from Exxon Mobil Corp. to Royal Dutch Shell Plc. Shale gas output will rise to 23 ...  

Feb. 10 (Bloomberg) -- Politic constraints and concern production gains at shale fields aren’t sustainable will hinder the development of liquefied natural gas export plants in the U.S., former Exxon Mobil Corp. chief Lee Raymond said.  

Feb. 13 (Bloomberg) -- Iraq may prevent Exxon Mobil Corp. from bidding in a new energy exploration round if it refuses to rescind agreements with the country’s semi-autonomous Kurdish region, according to a spokesman for Deputy Prime Minister ...