ExxonMobil paid no federal income tax in 2009 http://thinkprogress.org/2010/04/06/exxon-tax/

Last week, Forbes magazine published what the top U.S. corporations paid in taxes last year. “Most egregious,” Forbes notes, is General Electric, which “generated $10.3 billion in pretax income, but ended up owing nothing to Uncle Sam. In fact, it recorded a tax benefit of $1.1 billion.” Big Oil giant Exxon Mobil, which last year reported a record $45.2 billion profit, paid the most taxes of any corporation, but none of it went to the IRS: