ConocoPhillips agrees to buy Marathon Oil in $22.5bn deal Financial TimesConocoPhillips is buying Marathon Oil in $22.5 billion deal CNNConocoPhillips Will Buy Marathon Oil In Latest Big Energy M&A Deal ForbesConocoPhillips to Acquire Marathon Oil in $17.1 Billion All-Stock Deal The Wall Street JournalConocoPhillips to buy Marathon Oil for $22.5 billion in latest energy merger Yahoo Finance