Exxon Mobil is the world's largest private oil and petrochemical company and the world's leading enterprise in the field of oil and gas. It began with standard oil company founded by John Rockefeller in 1882 and headquartered in Irwin, Texas. ExxonMobil is also the world's first company with a market value of more than 400 billion US dollars. In fortune in 2006 Ranked first among the top 500.
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