Leading global oil and gas producers based on market cap June 2025

ExxonMobil has the highest market capitalization of any oil and gas producer worldwide. As of June 18, 2024, the United States-based company had a market cap of ****** billion U.S. dollars. 

Big Oil's place among the ten leading oil and gas companies

Of the five largest companies in this ranking, three were considered Big Oil companies. Meanwhile, the Indian conglomerate Reliance Industries, which operates the world's largest oil refinery complex and is also involved in retail and telecommunications, ranked fourth, with a market cap of more than *** billion U.S. dollars. 

KPI's of top oil & gas companies

While there has been little change in which 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, state-owned enterprises such as China's Sinopec are more likely to be found on top of a list of leading oil and gas companies worldwide based on revenue. State-owned enterprises such as Gazprom and PetroChina are furthermore the leading oil and gas companies worldwide based on employment. In 2023 and 2024, their respective workforce consisted of around ******* employees.