Biggest oil and gas companies based on market value 2019

American company Exxon Mobil was the world’s largest oil and gas company as of July 2019 based on market capitalization, with a market cap totaling around 318.8 billion U.S. dollars. The values are based on the Financial Times Global Equity Screener list.

Top oil and gas companies worldwide

Companies based in the United Kingdom such as Royal Dutch Shell and BP were also among the top ten global oil and gas companies. However, top ten rankings of oil and gas companies vary to include different companies depending on the metric used. For example, China's Sinopec is the leading oil and gas company worldwide based on revenue, but it is not among the ten leading oil and gas companies based on market capitalization.

Schlumberger, an oilfield service company based in Texas, is one of the largest oil and gas equipment providers in the United States, with a total market capitalization of nearly 54 billion U.S. dollars as of 2019. Oilfield service companies are generally not involved in oil production but instead provide equipment and services for companies undergoing exploration and production.

Leading oil and gas companies worldwide based on market capitalization as of 2019

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Release date

July 2019



Survey time period

as of July 2019

Supplementary notes

All figures as of May 9, 2018.

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Statistics on "Big oil"

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