World Top 100 Oil and Gas Companies List by Market Cap as of August 2026

Cenovus Energy is a integrated oil and natural gas company. The Company is owner of two projects that are producing oil, Christina Lake and Foster Creek. The headquarters is in Canada.

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.

SEMPRA ENERGY is Electric Utility and Gas Utility company with headquarters is in California, USA.It is an energy infrastructure company focused on connecting millions through the power of people, developing, building, operating and investing in clean power, energy networks, ideas and innovation. Sempra’s mission is to be North America’s premier energy infrastructure company. The Sempra family of companies have 20,000 talented employees who deliver energy with purpose to nearly 40 million consumers.

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

CHENIERE ENERGY is liquefied natural gas company. It owns and operates LNG terminals, and develops, constructs, and operates liquefaction. The company operates through two segments: LNG terminal business, and LNG and natural gas marketing business. The company conducts its business through its subsidiaries, including the development, construction and operation of its LNG terminal business and natural gas marketing business. The headquarters is in USA.

BASF SE is one of largest Chemical producing and mfarketing company with headquarters is in Germany. It manufactures Paints as well.

MARUBENI CORPORATION is a company mainly engaged in the import, export and transaction of various products through domestic and overseas networks. The company trading with business divisions in iron and steel, information technology, utility and infrastructure, food, energy, development and construction, industrial machinery, metals and mineral resources, and chemicals. The headquarters is in Japan.

Oil and Gas Exploration and Production company with headquarters is in Oklahoma, USA.

PKN Orlen is a Player on the Fuels and Energy Markets company. It capable of processing more than 35 million tonnes of various crude oil types per annum and network of over 2,800 modern service stations. It offering includes over 50 top quality petrochemical and refining products sold in more than 90 countries around the world on 6 continents. The company is also an important player on the Polish power market, ranking as the industrial electricity producer with a capacity of 1.9 GW. The headquarters is in Poland.

POLSKI KONCERN NAFTOWY ORLEN SPOLKA AKCYJNA is an integrated, multi-utility company, operating in Central Europe and Canada. The company provide energy and fuel to over 100 million of Europeans, while its advanced products are marketed to over 90 countries across 6 continents. This innovative product will be made from used cooking oils. Headquarters is in Poland.