11 Biggest Oil Companies in the World

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11. ADNOC

Output: 2.9 million barrels per day

State owned company of United Arab Emirates (UAE), the Abu Dhabi National Oil Company (ADNOC) is not only the country’s biggest company but also has access to its rich reserves. Now considered a ‘supermajor’ oil company, it operates 2 refineries and 18 subsidiaries.

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