Exxon big energy gainer after Buffett takes stake By: MarketWatch November 15, 2013 at 12:45 PM EST Energy stocks advance Friday, with Exxon Mobil Corp. a top gainer on news Warren Buffett’s Berkshire Hathaway Inc. took a large stake in the company. Read More >> Related Stocks: Berkshire Hathaway Berkshire Hathaway CONSOL Energy Chevron Corp ConocoPhillips Energy Select Sector SPDR Exxon Mobil Phillips 66 Tesoro Petroleum Co