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

It has business in oil and gas segment and electricity generation. Headquarters is in Argentina.

Gas transportation company with extensive gas pipeline system in Latin America. Headquarters is in Argentina.

Helmerich & Payne is a Petroleum Drilling and technology services providing company. The headquarters is in USA.

Thai Oil Public Company is a Oil Refining and Petrochemical company. It operates a highly complex refinery utilizing modern and efficient processing technologies to produce petroleum products primarily for domestic distribution and further diversifies investment into related businesses which include petrochemical products, lube base oil, ethanol, power generation as well as marine and pipeline transportation of petroleum and petrochemical products. The headquarters is in Thailand.

Valvoline is a Marketer and Supplier of premium branded lubricants and Automotive Services with sales in more than 140 countries. It operates and franchises approximately 1,400 quick lube locations. The company has high mileage with MaxLife technology motor oil for engines over 75,000 miles. The headquarters is in USA.

Patterson-UTI Energy provides Land Based Drilling Rigs and Significant Pressure Pumping Horsepower as well as a leading position in directional drilling and wellbore placement services that are positioned in the most active plays throughout the U.S. It provide a diverse network of drilling and pressure pumping services, directional drilling, rental equipment and technology to forge path to success and oilfield solutions deliver results that lead business into the next generation of oil and gas. The headquarters is in USA.