From 2011
Exxon Mobil Dodges the Tax Man Again
"Exxon Pays a Lower Effective Tax Rate than the Average American"
"..despite being Exxon Mobil?s fifth year as the top corporate earner in Fortune 500?s annual listing. The company paid no taxes at all to the U.S. federal government in 2009 on its domestic profits of nearly $2.6 billion."