The oil and gas industry in California is a key player in the state's economy and energy supply. Companies in this sector extract, refine and distribute hydrocarbon products originating from crude oil and natural gas. This industry encompasses various companies, ranging from large multinational conglomerates to smaller, specialized entities. They offer a variety of products and services including exploration, drilling, production, refining, distribution, and retail. As environmental concerns escalate, many companies are innovatively striving for sustainability by incorporating clean technology and lesser carbon footprint strategies in their operations. Thus, the industry is swiftly adjusting its bearings toward a more environmentally conscious future.


Top 21 oil and gas companies in California

1. Aera Energy LLC

  • Website: aeraenergy.com
  • Headquarters: Bakersfield, California, United States
  • Founded: 1997
  • Headcount: 1001-5000
  • Latest funding type: Acquired
  • LinkedIn

Aera Energy is an oil and gas company based in California, with operations in Kern County and other regions. It is committed to producing energy safely and responsibly through innovative processes and dedicated people.


2. Ks Industries, Lp

  • Website: ksilp.com
  • Headquarters: Bakersfield, California, United States
  • Founded: 1960
  • Headcount: 1001-5000
  • LinkedIn

KS Industries, LP (KSI) is a company that provides engineering, fabrication, maintenance, and construction services to various industries including upstream oil and gas production, natural gas treating and transportation, refining, co-generation, heavy industrial, and pipelines.


3. Berry Corporation

  • Website: bry.com
  • Headquarters: Bakersfield, California, United States
  • Founded: 1909
  • Headcount: 201-500
  • Latest funding type: Ipo
  • LinkedIn

Berry Corporation (bry) is an upstream energy company that focuses on the safe and responsible development and production of conventional oil reserves in the Western United States, primarily in the San Joaquin Basin. With a history dating back to 1909, Berry is committed to maintaining California's natural resources while creating value for its shareholders. The company provides relevant information on its financial performance and operations for investors and offers career opportunities and internships. Berry Corporation prioritizes sustainability and environmental, social, and governance (ESG) practices.


4. Chem-Energy Corporation

  • Website: chem-energy.com
  • Headquarters: Garden Grove, California, United States
  • Founded: 1990
  • Headcount: 1001-5000
  • LinkedIn

Chem-Energy Corporation is a petroleum products trading company, refiner of crude oil, and developer of refinery, power, and petrochemical projects. They trade crude oils, feed stocks, condensates, bunker fuels, and clean and refined petroleum products. They also distribute degreasers and lubricants, manage oil terminals and vessels, and offer consulting services. Chem-Energy can purchase and operate oil and gas productions and explore and drill wells. They process crude oils in the Far East and Europe and are looking to develop refinery projects in Asia and the Middle East.


5. ANSCO, Inc.

  • Website: ansco.us
  • Headquarters: Newport Beach, California, United States
  • Headcount: 201-500
  • LinkedIn

ANSCO is a company that provides services and technology to the oil and gas industry. They specialize in exploration, petroleum and derivatives trading, oilfield equipment and supplies, and various oilfield services. They aim to enhance exploration success and raise capital for long-term expansion.


6. Signal Hill Petroleum, Inc.

  • Website: shpi.net
  • Headquarters: Signal Hill, California, United States
  • Founded: 1984
  • Headcount: 51-200
  • LinkedIn

Signal Hill Petroleum is a privately owned California-based energy company specializing in responsible and sustainable exploration and development of oil and gas in urban areas. With over 30 years of experience, the company produces over one million barrels of crude oil annually, contributing to local and national economies.


7. Kenai Drilling Limited

Kenai Drilling Limited is a contract drilling services company specializing in the exploration and development of onshore and offshore oil, gas, and geothermal wells. With a rig fleet covering the western United States and mid continent regions, Kenai has grown and adapted to meet the needs of the petroleum industry. The company offers not only planning and drilling services but also specializes in building equipment for challenging drilling locations.


8. Royale Energy, Inc.

  • Website: royl.com
  • Headquarters: San Diego, California, United States
  • Founded: 1986
  • Headcount: 11-50
  • LinkedIn

Royale Energy, Inc. is a publicly traded oil and gas production company with operations in California and Texas. The company owns and operates over 70 producing oil and natural gas wells and focuses on identifying and developing low-risk drilling opportunities in known oil and gas fields. Royale Energy provides direct management of company properties to ensure high productivity. They market oil and natural gas to their customers.


9. Petroleum Club at Sundale

The Petroleum Club is a company offering services for the oil and gas industry. They provide a wide range of solutions including drilling, exploration, production, and refining.


10. The Termo Company

  • Website: termoco.com
  • Headquarters: Long Beach, California, United States
  • Founded: 1933
  • Headcount: 11-50
  • LinkedIn

The Termo Company is an oil and natural gas production company with over 80 years of experience. They focus on exploring and evaluating investment opportunities, leading safe operations, and reducing their environmental impact. They have strong relationships with partners, investors, and employees.


11. Magco Drilling Inc

Magco Drilling is a drilling services provider that specialises in the oil and gas industry. They offer a range of drilling services including well drilling, directional drilling and well completion services.


12. Redding Oil Co

Redding Oil Company is a petroleum and gas exploration company that engages in drilling and production of oil and natural gas in the United States.


13. Chalfouh International

Chalfouh is a company providing innovative solutions and services for the oil and gas industry.


14. West Coast Geologic

West Coast Geologic offers technological innovation and geologic expertise for mud logging and H2S abatement services. They provide tailored equipment for exploration and production wells with 24/7 well site service and well testing. They also offer rig monitoring and data acquisition with Tophand.


15. Chevron

  • Website: chevron.com
  • Headquarters: San Ramon, California, United States
  • Founded: 1999
  • Headcount: 10001+
  • LinkedIn

Chevron is a global energy corporation focused on safely delivering lower carbon energy to meet the world's growing demand. They leverage their strengths in exploration and production, new energy technologies, and supplier diversity to provide reliable and affordable energy solutions. They are committed to sustainability and driving social and economic development globally.


16. Decca Energy

Decca Energy is an international company specializing in various services for the energy industry. With over 30 years of experience, they offer expertise in engineering, programming, design and implementations, drilling and completions, workovers, optimization, lease and pipeline construction, and facilities. Their focus is on minimizing drilling and completion costs while maintaining long-term relationships with clients.


17. Vaughan Consulting Grp

Vaughan Consulting Group offers a wide range of consulting services in engineering, programming, design, drilling and completions, workovers, lease and pipeline construction, and facilities. With over 15 years of experience, we have built strong partnerships with clients and consultants, focusing on trust, integrity, and experience.


18. Fairweather & Co

Fairweather is a company that provides support services for Alaska's natural resource industry. They offer a range of services including remote medical services, logistic case management, weather/ice observations, drilling & production support, and more.


19. K&S Enterprises

  • Website: ksentusa.com
  • Headquarters: Adelanto, California, United States
  • Founded: 1971
  • Headcount: 11-50
  • LinkedIn

KS Enterprises is a manufacturer that specializes in the engineering and production of high-temperature, high-pressure seals, sleeves, ducts, and other flexible connectors. Their products are designed to meet precise temperature, pressure, and exposure requirements. KS serves a range of industries including aerospace, commercial aviation, military, oil and gas, and off-road vehicles.


20. DC Resources &a; Oilfield Services

DC Resources & Oilfield Services is an independent multi discipline oil and natural gas company focused on the acquisition, exploration and development of high-quality assets in the heart of the Rocky Mountains and beyond.


21. Streetwise Reports

Streetwise Reports is a financial news and information website that provides insights and analysis on various industries and investment opportunities.


Want to find more oil and gas companies?


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