World Top Oil and Gas Companies List by Market Cap as on Sep 1st, 2021

Saudi Aramco is oil and gas exploration, refinery and trading company. Saudi Aramco is the world’s largest integrated oil and gas company having both upstream and downstream operations, producing the energy and chemicals. Headquarters is in Saudi Arabia.

In 2019, Saudi Aramco produced 13.2 mmboed, including 9.9 mmbpd of crude oil. 

As on 2020, Saudi Aramco had 96,000 employees

ExxonMobil is the largest publicly traded international oil and gas company, uses technology and innovation to help meet the world’s growing energy needs. They hold an industry-leading inventory of resources and are one of the world’s largest integrated refiners, marketers of petroleum products and chemical manufacturers. Produces Petrochemicals, Diesel, Plastics and Gasoline. Headquarters is in USA.

RELIANCE INDUSTRIES is a Multi-Sector company with spread of business in Retail, Telecom, PetroChemicals, Energy, Textiles, Natural Resources with head quarters is in Mumbai of India. Reliance Industries employee count is 195,618 as on 2020. Now Reliance Industries can also be considered as a Technology company, as it created wonders in Telecom sector of India and providing high speed mobile internet at cheap cost.

As on April 2020:

Chevron Corporation is USA based Multi-National Energy Company. Chevron is one of the world’s leading integrated energy companies producing safe, reliable energy now and for the future. Headquarters is in USA.

BHP Billiton is Metals, Mining, Petroeum Company with headquarters in Australia. BHP Billiton is trading in London Stock Exchange and Australia Stock Exchange. BHP Group has 80,000 employees as on June 2020.

Royal Dutch Shell is Oil and Gas Company headquartered in Netherland and has Registered Office in UK. Royal Dutch Shell A and Royal Dutch Shell B are not two different companies. Key difference is Royal Dutch A and B shares is related to Taxation and Dividend.

PetroChina is second largest Oil and Gas Company in China with headquarters in China. Explores and Produces Oil and Gas. Markets PetroChemicals and other Chemicals.

TOTALENERGIES SE is Oil and Gas, Power Generation, Solar Power, Renewable Energy Company with headquarters in Paris, France. With operations in more than 130 countries, Total is the fourth-largest international oil and gas major as well as a global leader in liquefied natural gas (LNG) and a major player in low-carbon energies. Total Company also rank among the world’s top ten refining and petrochemicals companies.

Koch Industries is conglomerate company with 14 business sectors. Headquarters is in USA. They have businesses in:

Gazprom is Russia's biggest Oil and Gas Company. Gazprom is a global energy company focused on geological exploration, production, transportation, storage, processing and sales of gas, gas condensate and oil, sales of gas as a vehicle fuel, as well as generation and marketing of heat and electric power.