15 Biggest Private Oil Companies in the World

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In this article, we will discuss the 15 Biggest Private Oil Companies in the World. You can skip our industry overview and go directly to the 5 Biggest Private Oil Companies in the World.

Oil is an essential resource powering industries and economies around the world. The industry is dominated by large multinational corporations, such as Exxon Mobil Corporation (NYSE:XOM), BP p.l.c. (NYSE:BP), Shell plc (NYSE:SHEL), and Chevron Corporation (NYSE:CVX), which account for a significant portion of global oil production. However, there are also numerous smaller companies, both public and private, involved in various aspects of the oil industry. The integral role it plays in the overall economy of a country is the reason why many countries have nationalized their oil sector to exercise more control over oil reserves. Some of the largest state-owned oil companies include PetroChina, Rosneft, and Petroleos de Venezuela.

Russia’s war on Ukraine saw global oil prices soaring oversupply concerns. As European countries looked for alternatives to their energy imports and the West put sanctions on Russia, the markets soon realized that there might be a shortage of supply in the market, with Russia being a major oil producer. Hence, the brent oil price crossed $100 for the first time after 2014 in 2022. However, with the start of the Fed hiking cycle and a slowdown in global economies, the oil demand has slowed down in recent months and has come down below $100 in 2023. However, with China opening up and relaxing COVID restrictions, the global oil demand is expected to gain strength in the near term.

As per IEA, global oil demand is projected to increase by 1.9 mb/d, reaching a total of 101.7 mb/d in 2023, with a significant portion of the growth coming from China after the easing of Covid-related restrictions. On the other hand, the global oil supply growth is expected to decelerate to 1 mb/d after last year's 4.7 mb/d growth led by OPEC+. OPEC has also increased its forecast for global oil demand growth in 2023, primarily due to the relaxation of COVID-19 restrictions in China. As per OPEC, Chinese demand will grow by 590,000 barrels per day in 2023. The supply-side is expected to remain tight in 2023 with the organization reducing its supply forecasts for non-OPEC producers, which could lead to a tighter market and support oil prices.

15 Biggest Private Oil Companies in the World
15 Biggest Private Oil Companies in the World

Photo by Zbynek Burival on Unsplash

The Renewable Energy Factor

The global oil and gas industry is going through a major transition, driven by the climate change emergency. As per BP, global oil demand is expected to reach a peak level near the 2030s as the Russian invasion of Ukraine has accelerated efforts towards sustainable and clean energy. Governments around the world are now seeking to improve energy security by increasing the proportion of renewables in their energy mix.

Due to the implementation of supportive policies, O&G companies have been able to raise their investments in clean energy, which is expected to fast-track the transition towards clean energy. The United States has passed two acts between 2020 and 2022, namely the Infrastructure Investment and Jobs Act (IIJA) and the Inflation Reduction Act, which provide for approximately $450 billion of clean energy and related investments. Additionally, the Securities and Exchange Commission (SEC) has proposed rules that require companies to disclose their emissions in their SEC filings. Moreover, The European Commission has approved two plans, namely the Fit for 55 climate package and Europe's REPowerEU plan, which together provide nearly €300 billion in provisions for the clean energy transition and emissions reduction.

Our Methodology

To come up with the 15 biggest private oil companies in the world, we identified the biggest oil companies in major economies and ranked these companies in ascending order in order of their annual revenue. Our list contains companies that are not listed publicly and are held by private individuals/corporations. Our list also includes state-owned enterprises. We have sourced revenue data from multiple websites, including Fortune 500 and Statista.

Biggest Private Oil Companies in the World

15. Oman Oil Marketing Company

Annual Revenue 2021: $22.70 billion

Oman Oil Marketing Company is a state-owned energy investment corporation that operates in 17 countries around the world. The company's business units comprise upstream, downstream, commercial, and alternative energy segments. Through its products, Oman Oil Marketing Company serves a variety of industries, including food, agriculture, packaging, construction, functional fluids, automotive, medical care, and personal care. The company provides a broad line of petrochemicals and petroleum products, including various polymers, intermediate chemicals, derivatives, and refined products. The company markets its fuels and chemical products in more than 60 countries across the globe.

In addition to Oman Oil Marketing Company, China National Petroleum Corporation, Sinopec Group, and Reliance Petroleum are included in our list of 15 Biggest Private Oil Companies in the World.

14. Surgutneftegas

Annual Revenue 2021: $25.60 billion

Surgutneftegas is a Russian oil and gas corporation that was formed via the amalgamation of formerly state-owned companies with significant oil and gas reserves. The company engages in both upstream and downstream segments of the oil and gas industry, including the exploration, production, refining, and marketing of oil, gas, and its products. The sales network of the company comprises 5 subsidiaries that manage wholesale, retail, and storage of petroleum products and provide other services at gas stations.


Annual Revenue 2021: $26.40 billion

CEPSA is a multinational oil and gas corporation based in Spain. The company is also present in other countries, including the United Arab Emirates, Algeria, Colombia, and Peru. The major businesses of CEPSA comprise exploration & production, chemicals, commercial & clean energies, trading, and sustainable mobility. CEPSA is transforming its refineries to reduce its carbon footprint and develop new environmentally friendly products.

12. Petrovietnam

Annual Revenue 2021: $27.10 billion

Petrovietnam is an oil and gas corporation in Vietnam that operates in the oil & gas and renewable energy sectors. The major business activities of the company comprise exploration, production, petrochemicals, refining, the gas industry, and petroleum technical services. Petrovietnam also generates power through non-renewable and renewable energy sources. With a combined installed capacity of 5405 MW (megawatt), the company operates 4 gas power plants, 2 coal power plants, and 2 hydro-power plants.

11. CPC Corporation

Annual Revenue 2021: $30.02 billion

CPC Corporation is a state-owned petroleum corporation based in Taiwan. Due to limited natural resources in Taiwan, CPC Corporation relies on imports and foreign operations to meet its fossil fuel needs. In 2021, together with international oil corporations, CPC Corporation was engaged in 10 oil and gas exploration and production projects in 8 countries. Presently, the upstream operations comprise both onshore and offshore oil and gas fields in Taiwan and other countries. CPC Corporation runs two refineries in Taiwan, with a total refining capacity of 600,000 barrels of crude oil per day. Further downstream operations include refining and production of petrochemicals, imports, marketing, storage, and transportation operations.

10. GS Caltex Corporation

Annual Revenue 2021: $30.18 billion

Headquartered in South Korea, GS Caltex Corporation is an oil refiner jointly owned by GS Group and Chevron Corporation (NYSE:CVX). With a daily refining capacity of 800,000 barrels, the company refines 80 types of crude oil that it imports from approximately 30 countries across the United States, Europe, the Middle East, Australia, and Southeast Asia. These products are supplied to around 2,400 service stations, 400 filling stations, factories, and airline and railway operators in Korea.

9. Sonatrach Petroleum Corporation

Annual Revenue 2021: $34.50 billion

Sonatrach Petroleum Corporation is a state-owned oil corporation based in Algeria. The product line of the company includes kerosene, gasoline, distillate and residual fuel oils, and lubricants. Sonatrach Petroleum Corporation also provides shipping services through its wholly-owned subsidiaries, such as Sonatrach Gas Carrier Corporation, Sonatrach Petroleum Overseas Transportation Corporation, and Alrar Transportation Corporation.

8. China National Offshore Oil Corporation

Annual Revenue 2021: $38.10 billion

China National Offshore Oil Corporation is among the largest oil companies in China. The company has the exclusive rights to collaborate with foreign corporations on initiatives outside of China. Major operations of China National Offshore Oil Corporation include the exploration, development, and refining of oil and gas. In addition, the company also offers power generation, new energy development, and financial services. The international division of the company oversees operations in Africa, the Americas, Europe, Asia, and the Middle East.

7. Kuwait Petroleum Corporation

Annual Revenue 2021: $52.57 billion

Kuwait Petroleum Corporation is a national oil company in Kuwait. The company engages in all aspects of the oil and gas industry, including onshore and offshore exploration & production. Furthermore, the company refines, markets, and retails petrochemicals and also provides transportation services. The international operations of Kuwait Petroleum Corporation oversees the sale of around 301,000 barrels of oil products daily in Western Europe.

6. Pertamina

Annual Revenue 2021: $57.51 billion

Pertamina is an oil and natural gas company owned by the government of Indonesia. The company has six holdings that engage in several businesses, including upstream, gas, refinery, petrochemicals, trading, and integrated marine logistics. Pertamina also has sub-holdings that provide a number of products and services such as retail, air services, drilling services, training, consulting, etc.


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Disclosure: None. 15 Biggest Private Oil Companies in the World is originally published on Insider Monkey.