The data displays the most valuable oil and gas companies worldwide based on market value in May 2018. The values are based on the Financial Times Global 500 list. As of May 2018, oil and gas company PetroChina reached a market value of about 158.6 billion USD. American company Exxon Mobil was the world’s biggest oil and gas company as of 2018, with a market cap totaling around 242.98 billion USD.
Top oil and gas companies worldwide
Companies based in the UK such as Royal Dutch Shell and BP were also among the top ten global oil and gas companies.
