Top 10 oil and gas companies in USA

The United States holds a prominent position in the global oil and gas industry. With vast reserves, advanced drilling technology, and a competitive energy market, the country is home to some of the world’s leading oil and gas companies. These companies play a crucial role in meeting both domestic and international energy demands. Here’s a comprehensive list of top 10 oil and gas companies in the USA based on revenue, market influence, innovation, and sustainability efforts in 2025.

1. ExxonMobil Corporation

Headquarters: Irving, Texas
Founded: 1999 (from the merger of Exxon and Mobil)
Website: www.exxonmobil.com

Overview:
ExxonMobil is the largest publicly traded oil and gas company in the USA. It engages in oil exploration, production, refining, and petrochemicals. With operations in over 60 countries, it is a key player in upstream and downstream activities.

Key Highlights:

• Massive investments in carbon capture technology

• Aggressive push towards low-emission fuels and hydrogen energy

• Over 4 million barrels of oil equivalent produced daily

2. Chevron Corporation

Headquarters: San Ramon, California
Founded: 1879
Website: www.chevron.com

Overview:
Chevron is a major integrated energy company with operations in more than 180 countries. It explores, produces, and refines oil and gas and is significantly investing in renewable energy sources and carbon offsetting initiatives.

Key Highlights:

• Leader in deep-water drilling in the Gulf of Mexico

• Major investments in geothermal and renewable natural gas

• Revenue of over $250 billion in 2024

3. ConocoPhillips

Headquarters: Houston, Texas
Founded: 2002
Website: www.conocophillips.com

Overview:
Specializing in upstream operations, ConocoPhillips is among the largest independent oil and gas exploration companies in the USA. It has major assets in the Lower 48, Alaska, and globally in Australia, Norway, and Qatar.

Key Highlights:

• Leader in shale oil production

• Focused on sustainable operations and low-cost supply

• Recent acquisition of Permian Basin assets

4. Phillips 66

Headquarters: Houston, Texas
Founded: 2012
Website: www.phillips66.com

Overview:
Phillips 66 operates in refining, midstream, chemicals, and marketing. Known for its high-efficiency refining facilities and commitment to innovation in fuel technologies.

Key Highlights:

• Operates 13 refineries across the USA

• Joint venture in petrochemicals with Chevron (Chevron Phillips Chemical)

• Investments in battery technology and renewable diesel

5. Valero Energy Corporation

Headquarters: San Antonio, Texas
Founded: 1980
Website: www.valero.com

Overview:
Valero is the world’s largest independent petroleum refiner. It produces gasoline, diesel, jet fuel, and ethanol, with a focus on clean energy alternatives.

Key Highlights:

• Owns 15 petroleum refineries

• Largest renewable diesel producer in the U.S.

• Growing footprint in biofuels and ethanol

6. Marathon Petroleum Corporation

Headquarters: Findlay, Ohio
Founded: 1887
Website: www.marathonpetroleum.com

Overview:
Marathon Petroleum focuses on refining, marketing, and transporting petroleum products. The company owns the largest refining system in the United States.

Key Highlights:

• Acquired Andeavor to expand refining capacity

• Significant logistics network via MPLX LP

• Renewable fuels expansion underway

7. EOG Resources, Inc.

Headquarters: Houston, Texas
Founded: 1999
Website: www.eogresources.com

Overview:
A leader in shale production, EOG Resources is known for its technological innovation in horizontal drilling and hydraulic fracturing. Its operations span across the Permian Basin, Eagle Ford, and other major U.S. oil plays.

Key Highlights:

• One of the lowest-cost oil producers

• Focused on sustainability and emissions reduction

• High yield oil assets in the U.S. and Trinidad

8. Pioneer Natural Resources

Headquarters: Irving, Texas
Founded: 1997
Website: www.pxd.com

Overview:
Pioneer is a leading independent oil and gas company with a strong presence in the Permian Basin. It focuses on long-term value creation through capital efficiency and environmental stewardship.

Key Highlights:

• One of the largest producers in the Permian Basin

• Innovative water recycling and emission control strategies

• Merged with Parsley Energy for operational synergy

9. Hess Corporation

Headquarters: New York City, New York
Founded: 1919
Website: www.hess.com

Overview:
Hess is a global E&P company with operations in the U.S., Guyana, and Southeast Asia. It is particularly known for its offshore drilling and recent major discoveries in Guyana in partnership with ExxonMobil.

Key Highlights:

• Major stake in the Stabroek Block (Guyana)

• Strong ESG initiatives and net-zero targets by 2050

• Focus on deepwater oil exploration

10. Occidental Petroleum Corporation (Oxy)

Headquarters: Houston, Texas
Founded: 1920
Website: www.oxy.com

Overview:
Occidental is a global oil and gas company with significant operations in the U.S., the Middle East, and Latin America. It is also a leader in carbon management and enhanced oil recovery.

Key Highlights:

• Leading the way in direct air capture (DAC) technology

• Extensive operations in the Permian and DJ Basins

• Oxy Low Carbon Ventures driving decarbonization efforts

Conclusion

The U.S. oil and gas industry is evolving rapidly with increased focus on sustainability, carbon neutrality, and energy diversification. These top 10 companies not only fuel the nation’s energy needs but also drive innovation in clean energy, advanced drilling, and emissions reduction. Whether you’re an investor, industry professional, or an energy enthusiast, keeping an eye on these giants is key to understanding the future of global energy.

FAQs