Have you ever wondered who the Biggest Oil Companies in the world are and what makes them so influential? As global energy demands evolve, the oil and gas market is growing fast, with its size set to reach $8,184.98 billion in 2025!
But what exactly does the oil industry entail?
From exploration and drilling to refining and transportation, oil companies play key roles in three main sectors:
- Upstream – Exploration and drilling for crude oil and natural gas.
- Midstream – Transportation and storage of crude oil and refined products.
- Downstream – Refining crude oil into usable products like gasoline, diesel, and petrochemicals.
Now that you’ve got a basic understanding of the oil industry, let’s take a look at the Biggest Oil Companies worldwide in 2025.
List Of The Top 10 Biggest Oil Companies in 2025
| Company Name | Country | Market Cap 2025 |
| Saudi Aramco | Saudi Arabia | $1.787 Trillion |
| Exxon Mobil | USA | $478.31 Billion |
| Chevron | USA | $268.49 Billion |
| PetroChina | China | $202.34 Billion |
| Shell | UK | $200.96 Billion |
| TotalEnergies | France | $135.09 Billion |
| ConocoPhillips | USA | $129.62 Billion |
| CNOOC | China | $118.95 Billion |
| TAQA | UAE | $95.82 Billion |
| Enbridge | Canada | $95.70 Billion |
1. Saudi Aramco
- Founded: 1933
- Headquarters: Dhahran, Saudi Arabia
- Market Cap: $1.787 Trillion
Saudi Aramco is Saudi Arabia’s national oil company and the largest oil company in the world. It operates across the entire oil and gas supply chain, including exploration, production, refining, and distribution.
The company holds the second-largest proven crude oil reserves globally, with over 250 billion barrels. It also leads in daily oil production, making it the top producer among all oil companies.
Beyond oil, Aramco runs the world’s largest single-hydrogen network, known as the Master Gas System (MGS). This system helps the company maximize the value of its gas reserves, supplying cleaner energy and supporting Saudi Arabia’s chemical industry.
Aramco is the 6th most valuable company in the world with a market cap of $1.787 Trillion. Also, Aramco’s latest revenue (TTM) stands at $488.98 billion according to its latest financial reports.
2. Exxon Mobil
- Founded: 1999
- Headquarters: Texas, USA
- Market Cap: $478.31 Billion
ExxonMobil is the world’s second-largest publicly traded petroleum and petrochemical company. With a history spanning over 140 years, it has grown from a small U.S. kerosene marketer to a global energy leader.
Today, the company operates in multiple sectors including upstream, midstream, and downstream. ExxonMobil has a presence in 60 countries and is recognized by its well-known brands: Exxon, Esso, and Mobil.
In Jan 2025, ExxonMobil made a breakthrough in emissions reduction. At its Baytown Olefins Plant, it became the first to demonstrate a steam cracker burner running on up to 100% hydrogen fuel at an industrial scale. This led to a 90% reduction in direct CO₂ emissions, marking a major step in lowering emissions across key industries.
ExxonMobil is actively working toward a more sustainable energy future by investing in carbon capture, hydrogen energy, and biofuels, to help lower its environmental impact.
Moreover, ExxonMobil is the 20th most valuable company in the world with a market cap of $478.31 Billion. ExxonMobil also reported earnings of $33.7 billion for 2024, reflecting its strong position in the global energy market.
3. Chevron
- Founded: 1879
- Headquarters: California, USA
- Market Cap: $268.49 Billion
Chevron Corp. is a leading American multinational energy company specializing in oil and gas. As the second-largest direct descendant of Standard Oil, it operates in over 180 countries, making it one of the biggest players in the energy sector.
The company is involved in every stage of the petroleum industry, from exploration and production to refining, marketing, and transportation. Additionally, Chevron is also investing in renewable energy. It is actively working on solar, biomass, and hydrogen projects, aiming to support cleaner energy solutions.
By 2025, Chevron plans to reach 1 million barrels of oil equivalent per day in the Permian Basin. It is also bringing new projects online in the U.S. Gulf of Mexico and expects to achieve its first oil production at the Future Growth Project in Tengiz.
Additionally, Chevron is the 37th most valuable company worldwide with a market cap of $268.49 Billion. Also, in 2024, Chevron reported $17.6 billion in earnings, reflecting its strong position in the global energy market as one of the biggest oil companies.
4. PetroChina
- Founded: 1999
- Headquarters: Beijing, China
- Market Cap: $201.32 Billion
PetroChina Co., Ltd. (PetroChina) is an oil and gas corporation that is a subsidiary of China National Petroleum Corporation. It operates across the entire energy sector, from exploration and production to refining, chemicals, and transportation.
The company is a major one among petroleum companies in China. It has 13 large refining bases, 7 ethylene production bases, and 3 aromatics production bases. Beyond oil, PetroChina is also involved in natural gas transportation, with extensive pipeline networks that move crude oil, refined products, and natural gas across the country.
PetroChina is heavily invested in research and development (R&D). It operates 84 research institutes, 21 national R&D institutions, and 54 company-level key laboratories, covering all aspects of the upstream, midstream, and downstream sectors.
Lastly, PetroChina’s latest revenue (TTM) stands at $417.87 billion, and is the 66th most valuable company in the world with a market cap of $202.34 Billion. These figures prove why PetroChina is one of the biggest oil companies in the world.
5. Shell
- Founded: 1907
- Headquarters: London, UK
- Market Cap: $200.96 Billion
Shell plc, formerly known as Royal Dutch Shell, is a multinational oil and gas company with operations worldwide. It is involved in exploring and producing oil and gas from both traditional fields and unconventional sources like tight rock, shale, and coal formations.
The company operates refineries and petrochemical plants across different countries. Its product portfolio includes lubricants, bitumen, liquefied petroleum gas (LPG), and petrochemicals, which serve industries such as plastics, paints, and detergents.
Recently, Shell restarted oil and gas production at the Penguins field in the UK North Sea using a floating production, storage, and offloading (FPSO) facility. While mainly an oil project, Penguins will also generate enough gas to heat around 700,000 UK homes per year.
In 2024, Shell plc earned $23.7 billion reflecting its strong position in the global energy market. Lastly, Shell reported a revenue (TTM) of $296.76 billion and is the 67th most valuable company in the world with a market cap of $200.96 Billion.
6. TotalEnergies
- Founded: 1924
- Headquarters: Courbevoie, France
- Market Cap: $135.09 Billion
TotalEnergies was founded in 1924 under the name Compagnie Française des Pétroles (CFP), with the goal of ensuring France’s energy independence. Over the years, the company expanded its operations globally and adapted to the changing energy landscape of the 21st century.
Today, TotalEnergies is a global multi-energy company that produces and markets a wide range of energy sources, including oil and biofuels, natural gas, green gases, renewables, and electricity.
The company is involved in drilling, oil and gas production, processing, transportation, refining, and petrochemical production, alongside storage and distribution of petroleum products and specialty chemicals.
With more than 100,000 employees in nearly 120 countries, TotalEnergies continues to lead in energy transition efforts, focusing on sustainable energy solutions. The company reported a net income of $18.3 billion in 2024, and has a market cap of $135.09 Billion in 2025 reflecting its strong financial performance.
7. ConocoPhillips
- Founded: 1875
- Headquarters: Texas, USA
- Market Cap: $129.62 Billion
ConocoPhillips is a major independent exploration and production company operating in 13 countries. The company focuses on the upstream sector of the oil and gas industry, including exploration, production, and transportation of crude oil, natural gas, and related products.
In January 2025, ConocoPhillips became the sole operator of the Kebabangan Cluster in Malaysia, a significant oil and gas project, after transitioning from a joint venture with Petronas and Shell. This move is expected to enhance energy security in Malaysia.
Lastly, ConocoPhillips is the 127th most valuable company in the world with a market cap of $129.62 Billion in 2025. Also, it’s latest financial report shows the company has a current revenue (TTM) of $55.23 billion.
8. CNOOC
- Founded: 1982
- Headquarters: Beijing, China
- Market Cap: $118.95 Billion
CNOOC is China’s largest producer of offshore crude oil and natural gas. Operating in multiple countries, it focuses on the exploration, development, and production of energy resources.
The company follows strict carbon emission reduction policies and implements a Green Development Action Plan to strengthen environmental protection and develop clean energy.
In 2025, CNOOC plans a 5.6-8.3% production increase, targeting 760-780 million barrels of oil equivalent. It also plans a capital expenditure of $17.18 billion, focusing on new domestic and international production.
Additionally, CNOOC’s latest financial reports show a revenue (TTM) of $61.48 billion and a market cap of $118.95 Billion in 2025. This solidifies its status as one of the biggest oil companies in the world.
9. TAQA
- Founded: 2005
- Headquarters: Abu Dhabi, UAE
- Market Cap: $95.82 Billion
TAQA is an international company specializing in well solutions for the energy industry. Operating in multiple countries, TAQA offers a comprehensive range of services, including drilling, well completions, and intervention.
Their expertise encompasses coiled tubing, well stimulation, cementing, wireline, fracturing, directional drilling, downhole tools, completions, well testing, slickline, inspection, and H2S & safety.
In alignment with Saudi Arabia’s Green Initiative, TAQA’s Energy Transition Strategy focuses on increasing reliance on clean energy and offsetting emissions.
As of February 2025, TAQA’s market capitalization stands at $95.82 billion, making it the world’s 183rd most valuable company by market cap.
10. Enbridge
- Founded: 1949
- Headquarters: Calgary, Canada
- Market Cap: $95.70 Billion
Enbridge is a leading energy delivery company, primarily operating in the United States and Canada. They specialize in transporting oil and natural gas through an extensive pipeline network. They also focus on renewable energy projects, including wind and solar. Their goal is to advance low-carbon energy technologies and reduce emissions.
Enbridge transports around 30% of the crude oil produced in North America and nearly 20% of the natural gas consumed in the U.S. Additionally, Enbridge operates the largest natural gas utility in North America by volume.
As of Enbridge’s latest financial reports the company’s current revenue (TTM ) is $35.96 Billion and has a market cap of $95.70 Billion, making it one of the biggest oil and gas industry companies globally.
Well, we have reached the end of our list of the top 10 biggest oil companies. Now lets look at some detailed insights on this list!
Expert Insights On The Biggest Oil Companies
| Dominance of U.S. and China | China and US oil producers dominate the list with multiple companies (ExxonMobil, Chevron, PetroChina, CNOOC), showing their growing energy influence. |
| Diversification into Renewables | Many companies, such as Chevron, Shell, and TotalEnergies, are shifting to renewable energy, investing in hydrogen, biofuels, and carbon capture to mitigate emissions. |
| Energy Transition Alignment | TAQA and Enbridge are diversifying into renewable energy and green initiatives, aligning with the global sustainability goals. |
| Hydrogen and Carbon Solutions | Companies like ExxonMobil and Chevron are exploring hydrogen energy and carbon capture to lower emissions and help transition towards cleaner energy. |
FAQs
- Who is the largest oil and gas company?
Ans: Saudi Aramco is the largest oil and gas company since it holds the biggest proven crude oil reserves and has the highest daily production capacity. The company is also the most valuable in the industry, with a market capitalization of over $1.78 trillion in 2025.
- Who are the 7 oil sisters?
Ans: The Seven Sisters were the dominant oil companies that controlled much of the global oil industry in the mid-20th century. They included Standard Oil of New Jersey (Exxon), Standard Oil of New York (Mobil), Standard Oil of California (Chevron), Gulf Oil, Texaco, Royal Dutch Shell, and BP (British Petroleum).
- What are the top 5 oil companies in the US?
Ans: The top 5 oil companies in the US are as follows:
| Top 5 US Oil Companies | Market Cap 2025 |
| Exxon Mobil | $478.31 Billion |
| Chevron | $268.49 Billion |
| ConocoPhillips | $129.62 Billion |
| Southern Company | $91.89 Billion |
| Duke Energy | $87.95 Billion |
Also Read: Highest Taxed Countries in the World [Updated 2024]
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