The energy field is massive, spanning renewable energy, nuclear power, and oil and gas. But, what companies are in the energy field? Many of the largest energy companies focus on oil and gas, though companies in solar power and electric vehicles (EVs) are gaining prominence as the world tries to pivot toward sustainable energy solutions.
Using data from annual financial statements, we’ve compiled the biggest and most prominent top energy companies in the U.S. for 2025.
Top 10 Energy Companies in the U.S.
1. ExxonMobil
Headquarters: Houston, TX
Revenue: $344.58 billion
ExxonMobil is an oil and gas corporation named after a 1999 merger between energy companies Mobil and Exxon. A direct descendant of John D. Rockefeller’s 1882 oil company Standard Oil, ExxonMobile split from the original company due to a 1911 Supreme Court decision. The split was an effort to prevent monopolization in the petroleum industry.
ExxonMobil is currently the eleventh largest company in the world by revenue and deals in energy products like crude oil, natural gas, power generation, and petrochemicals.
2. Chevron
Headquarters: San Ramon, CA
Revenue: $196.91 billion
Chevron was founded in 1879 as the Pacific Coast Oil Co. Later, Standard Oil bought it out before spinning it off in 1911 because of anti-monopolization efforts from the U.S. Supreme Court. The company operated under the name Standard Oil of California until fully adopting “Chevron” in the 1960s.
Chevron offers oil and gas products, lubricants, and fuel oil additives and operates retail service and gas stations under both the Chevron and Texaco names.
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3. Marathon Petroleum
Headquarters: Findlay, OH
Revenue: $150.31 billion
Marathon Petroleum is a petroleum refining and transportation company officially founded in 2009, but its roots trace back to Marathon Oil, which was founded in 1887. Marathon Petroleum currently owns 16 refineries in the U.S. and is the largest petroleum refinery in the country. In addition to processing natural resources, Marathon Petroleum sells gasoline and diesel fuel to independent marketers, retailers, and distributors.
4. Phillips 66
Headquarters: Houston, TX
Revenue: $149.89 billion
Phillips 66 is a refining, retail, and chemical business spun off from ConocoPhillips in 2012. In addition to oil refining, Phillips 66 operates service stations and is one of the largest supplies of lubricants in the U.S. The company owns and operates 13 refineries across the U.S. and Europe.
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5. Valero Energy
Headquarters: San Antonio, TX
Revenue: $144.76 billion
Valero Energy is a downstream oil and gas company that owns and operates multiple refineries for gas and oil, ethanol plants, and a massive wind farm. The company was founded in 1980 as LoVaca Gathering Company, a subsidiary of Coastal States Gas Corp. In addition to its refining and processing operations, Valero Energy owns a number of fueling stations in the U.S. and Europe.
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6. Tesla
Headquarters: Austin, TX
Revenue: $96.77 billion
Although Tesla is well known for its electric vehicles, it is also a significant player in energy storage systems, solar panels, solar shingles, and renewable energy solutions. Founded in 2003 in San Carlos, CA, Tesla has grown to become the most valuable auto manufacturer in the world and one of the most valuable companies overall.
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7. Energy Transfer LP
Headquarters: Dallas, TX
Revenue: $78.59 billion
Energy Transfer LP is a midstream oil and gas company that transports and stores natural gas, crude oil, natural gas liquids, and refined products. As one of the largest midstream companies in the U.S., Energy Transfer LP manages more than 125,000 miles of pipelines. The company also operates retail fuel stations through its subsidiary, Sunoco.
8. General Electric
Headquarters: Boston, MA
Revenue: $67.95 billion
General Electric (GE) is an American energy and technology conglomerate founded in 1892 by a merger between Thomas Edison’s Edison General Electric Company and Charles Coffin’s Thomson-Houston Electric Company. In 2021, General Electric announced plans to split into three separate public companies: GE Aerospace, GE HealthCare, and GE Vernova, an energy-focused spin-off. The company intends to finalize the separation of its energy business in 2024.
Outside of its well-known appliances and electrical distribution, GE is involved in wind turbines, nuclear power, and other renewable energy functions. Additionally, through its subsidiaries, GE operates in aircraft manufacturing, software development, and financial services.
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9. ConocoPhillips
Headquarters: Houston, TX
Revenue: $58.57 billion
Officially founded in 2002 from a merger of Conoco Inc. and Phillips Petroleum Company, ConocoPhillips has roots that trace back to the 1875 company Continental Oil and Transportation Company. ConocoPhillips now operates in 15 countries, transporting and marketing products in natural gas liquids, bitumen, liquified natural gas, and petroleum products. The company also has a strong presence in the hydrocarbon exploration industry, seeking deposits of natural gas and petroleum worldwide. ConocoPhillips exited its refining activities in 2012 with the formation of Phillips 66.
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10. Enterprise Products Partners
Headquarters: Houston, TX
Revenue: $49.71 billion
Enterprise Products Partners is a midstream crude oil and natural gas pipeline company founded in 1968. In 2004, Enterprise Products acquired GulfTerra and formed one of the largest midstream oil and gas companies in the U.S., controlling over 50,000 miles of natural gas liquids, crude oil, and offshore pipelines. The company also owns and operates natural gas storage facilities, marine terminals for importing and exporting natural gas liquids, and natural gas processing facilities.
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Originally published on forage.com
