The FORBES Global 2000 ranking is based on a composite score from equally-weighted measures of revenue, profits, assets and market value. These companies are the biggest that occupy the oil and gas space. Six of the top oil and gas companies are based in the U.S. and five in Russia.
The 2016 list features public companies from 63 countries that together account for $35 trillion in revenue, $2.4 trillion in profit, $162 trillion of assets, and have a combined market value of $44 trillion.
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