Leading oil and gas producers based on market cap October 2022

Exxon Mobil has the highest market capitalization of any oil and gas producer worldwide. As of October 17, 2022, the United States-based company had a market cap of 410.22 billion U.S. dollars. Of the ten largest companies, five were considered Big Oil companies. Reliance Industries, the Indian conglomerate, which operates the world's largest oil refinery complex and is also involved in retail and telecommunications, ranked third, with a market cap of nearly 200 billion U.S. dollars.

KPI's of top oil & gas companies

While there has been little change in what companies are counted among the largest within their industry, their ranking varies depending on the metric used. Although ExxonMobil has often ranked first in terms of market capitalization, China's Sinopec was found to be the leading oil and gas company worldwide based on revenue, with ExxonMobil ranking third. Meanwhile, state-owned enterprises such as Gazprom and PetroChina are the leading oil and gas companies worldwide by employment. In 2021, their respective workforce was over 400,000 people strong.