The World’s Biggest Oil Companies

How much has the shale boom shifted the rankings of the world’s 20 biggest oil and gas companies? We compared today’s giants with data from 2003 to see what, if anything, has changed for the likes of Exxon, Shell, BP, Saudi Aramco and Chevron. Who do you think is on top?

1. Saudi Aramco

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2013: 12.7 million BOE per day (barrels of oil + natural gas equivalents)
2003: 9.9 million BOE per day (rank: 1)    
Saudi Arabia’s Minister of Petroleum and Mineral Resources Ali Ibrahim Al-Naimi speaks to journalists at a hotel in in Vienna, Austria, on Monday, June 11, 2012. Al-Naimi joined Saudi Aramco in 1947, age 12, studied in the U.S., rose to become CEO and is now the world’s most powerful oilman. Data courtesy WoodMackenzie. 

2. Gazprom


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2013: 8.1 million BOE per day (oil + natural gas equivalents)   

2003: 9.5 million BOE per day (rank: 2)   

In this Tuesday, Nov. 12, 2013 photo, Russian President Vladimir Putin, right, talks with Russian state energy giant Gazprom CEO Alexey Miller during the cooperation signing ceremony between Russia and Vietnam at the Presidential Palace in Hanoi, Vietnam. Putin announced that Russia and Vietnam would be strengthening their energy and military ties.   Data courtesy WoodMackenzie.

3. National Iranian Oil Company


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2013: 6.1 million BOE per day (oil + natural gas equivalents)  
2003: 4.9 million BOE per day (rank: 3)   
Iran’s Minister of Petroleum, Rostam Ghasemi, gestures before the start of the 161st meeting of the OPEC in Vienna, on June 14, 2012. Despite international sanctions on its nuclear program, Iran has been able to grow its natural gas output.  Data courtesy WoodMackenzie.

4. ExxonMobil


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2013: 5.3 million BOE per day (oil + natural gas equivalents)  
2003: 4.6 million BOE per day (rank: 4)   
Russia’s President Vladimir Putin (R) and ExxonMobil Chairman and CEO Rex Tillerson (L) attend at the ceremony of the signing of an agreement between state-controlled Russian oil company Rosneft and ExxonMobil in the Black Sea port of Tuapse on June 15, 2012.   Data courtesy WoodMackenzie.

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