10 Biggest Oil Companies

Oil is a dominant source of energy worldwide and oil companies supply billions of barrels of petroleum products daily to power transportation and industry. Rising public concern about climate change and measures to reduce the use of carbon-based fuels have yet to fully impact the industry. Two of these oil and gas giants—Exxon and Shell—also fall into the category of being some of the most profitable companies in the world.

These are the 10 biggest oil companies as measured by trailing 12-month (TTM) revenue. All figures are as of Aug. 24, 2025, according to Yahoo Finance.

While U.S.-based companies dominate the list, the ranking also includes companies based in Saudi Arabia, China, the U.K., and France.

1. Saudi Arabian Oil Co. (Saudi Aramco)

• Revenue (TTM): $460.0 billion
• Net Income (TTM): $97.4 billion
• Market Cap: $1.5 trillion
• 1-Year Trailing Total Return: -9.2%
• Exchange: Saudi Arabian Stock Exchange

Saudi Aramco is one of the largest companies in the world across all industries and the largest global oil-producing company by revenue. It is the only company on this list not traded in the U.S. Saudi Aramco is the world’s largest integrated oil and gas company and has facilities in targeted innovation hubs in the United States, Europe, and Asia.

• Revenue (TTM): $428.7 billion
• Net Income (TTM): $6.8 billion
• Market Cap: $12.9 billion
• 1-Year Trailing Total Return: -1.6%
• OTC Markets

China Petroleum & Chemical is a producer and distributor of a variety of petrochemical and petroleum products. The company’s products include gasoline, diesel, kerosene, synthetic rubbers and resins, jet fuel, and chemical fertilizers, among other related offerings. Also known as Sinopec, China Petroleum & Chemical is among the very largest oil refining, gas, and petrochemical companies in the world.

• Revenue (TTM): $401.8 billion
• Net Income (TTM): $23.1 billion
• Market Cap: $30.2 billion
• 1-Year Trailing Total Return: 22.1%
• OTC Markets

PetroChina is the publicly listed unit of the state-owned China National Petroleum Corporation. PetroChina is the largest oil and gas producer and distributor in China, contributing approximately 50% and 60% of China’s domestic oil and gas production volume respectively.

• Revenue (TTM): $329.4 billion
• Net Income (TTM): $-854 million
• Market Cap: $474.4 billion
• 1-Year Trailing Total Return: 0.50%
• Exchange: New York Stock Exchange

Exxon Mobil explores, produces, trades, transports, and sells oil and natural gas. An industry leader in profitability in the energy and chemical manufacturing sector, it operates facilities or markets products globally and explores oil and natural gas on six continents. ExxonMobil markets fuels, lubricants, and chemicals under four brands: Esso, Exxon, Mobil, and ExxonMobil.

• Revenue (TTM): $272.0 billion
• Net Income (TTM): $13.6 billion
• Market Cap: $213.4 billion
• 1-Year Trailing Total Return: 7.24%
• Exchange: New York Stock Exchange

Shell is an international energy company with locations in 70 countries involved in the exploration, production, refining, and marketing of oil and natural gas, and the manufacturing and marketing of chemicals.

• Revenue (TTM): $187.7 billion
• Net Income (TTM): $13.7 billion
• Market Cap: $318.7 billion
• 1-Year Trailing Total Return: +13.47%
• Exchange: New York Stock Exchange

Chevron is an integrated oil company with upstream and downstream operations. The upstream division is involved in the exploration and production of oil and natural gas, while downstream operations cover refining, transportation, and marketing. Chevron is also involved in chemical and mining operations as well as non-energy activities such as technology development.

• Revenue (TTM): $187.1 billion
• Net Income (TTM): $12.8 billion
• Market Cap: $140.0 billion
• 1-Year Trailing Total Return: -1.45%
• Exchange: New York Stock Exchange

Headquartered in France, TotalEnergies explores and produces crude oil, natural gas, and low-carbon electricity. Total also refines and produces petrochemical products. The company owns and operates gas stations throughout Europe, the U.S., and Africa.

8. BP PLC (BP)

• Revenue (TTM): $186.5 billion
• Net Income (TTM): $563 million
• Market Cap: $89.6 billion
• 1-Year Trailing Total Return: 10.17%
• Exchange: New York Stock Exchange

British oil company BP is involved in oil and petrochemical exploration, production, and supply. The company refines and sells petroleum products, including chemicals such as acetic acid, ethylene, polyethylene, and terephthalic acid. The company’s strategy will pivot from an international oil company focused on producing resources to an integrated energy company focused on delivering solutions for customers and investors. BP brands include Castrol, Aral, and Amoco.

• Revenue (TTM): $133.6 billion
• Net Income (TTM): $2.1 billion
• Market Cap: $52.0 billion
• 1-Year Trailing Total Return: 1.76%
• Exchange: New York Stock Exchange

Serving customers across the U.S., Marathon refines and ships petroleum products. Marathon is a leaseholder or owner of thousands of miles of petroleum pipelines. MPC’s marketing system includes branded locations across the United States, including Marathon brand retail outlets.

• Revenue (TTM): $123.8 billion
• Net Income (TTM): $764 million
• Market Cap: $45.2 billion
• 1-Year Trailing Total Return: 4.68%
• Exchange: New York Stock Exchange

Valero is the largest independent petroleum refiner in the world and the world’s second-largest renewable fuels producer. Valero hosts 15 refineries in the U.S., Canada, and the United Kingdom and 33 wind turbines in the United States.