World Top 100 Petroleum Companies List by Market Cap as of August 2026

Core operations include transportation, storage and terminalling for natural gas, crude oil, NGLs, refined products and liquid natural gas. Headquarters is in Texas, USA.

Energy Transfer acquired Enable Midstream Partners for 7 Billion USD as on Feb-2021.

Abu Dhabi National Oil and GAs Company. 
Headquarters is in UAE.
It operates Trading, Productuion, and the manufacturing of petrochemical products. And it also  supplier of quality oil and petroleum products to local and international customers.

Imperial Oil is Canada based Oil and Gas Company and it has Petroleum refinery business. Headquarters is in Canada.

Oil and Gas Exploration and Production company with headquarters is in Texas, USA. As on 2018 they had around 11000 employees.

As on 2022, OCCIDENTAL PETROLEUM CORPORATION has 11,973 employees.

OCCIDENTAL PETROLEUM CORPORATION annual revenue generated for period ending Dec-2022 was 36,634 million USD.

OCCIDENTAL PETROLEUM CORPORATION annual net income generated for period ending Dec-2022 was 12,421 million USD.

Diamondback is an independent oil and natural gas company headquartered in Midland, Texas focused on the acquisition, development, exploration and exploitation of unconventional, onshore oil and natural gas reserves in the Permian Basin in West Texas. Diamondback's activities are primarily focused on the horizontal exploitation of multiple intervals within the Wolfcamp, Spraberry, Clearfork, Bone Spring and Cline formations.

As on 2022, DIAMONDBACK ENERGY has 972 employees.

ROSNEFT OIL COMPANY is Petroleum Refining, Oil and Gas company with headquarters is in Moscow, Russia.

Oil and Gas Exploration, Refining, Distribution with headquarters is in Colombia.

Novatek is Natural Gas Producing company with headquarters is in Russia.

ONGC is Oil and Gas Exploration and Producing PSU Sector Company with headquarters is in Dehradun of India. As on March-2023, ONGC has 25,993 Employees.