California's oil and gas industry is a vital segment of the state's economy, marked by exploration, extraction, and service activities that fuel both local and national markets. Companies range from large corporations to smaller independent firms, engaging in oil production, refining, and distribution. In recent years, there's a noticeable shift towards sustainable practices, with many companies investing in cleaner energy solutions. This transition highlights the industry's adaptability to evolving market demands and regulations, driving innovation while addressing environmental concerns. Despite challenges, California remains a key player in the oil and gas sector, maintaining significant reserves and production capabilities.

The companies listed here vary in size from small family-owned operations to larger corporate entities, employing between 11 and 5,000 staff across California. Many were established decades ago, with roots stretching back to the early 20th century. They engage in various activities including exploration, production, refining, and distribution of petroleum and related products. With headquarters spread over cities like Bakersfield, Long Beach, and Irvine, these firms reflect the state's historical and ongoing significance in the oil and gas landscape and are increasingly focused on sustainability initiatives.

Read on to discover the top oil and gas companies in California.

Top 21 Oil And Gas Companies in California

1. Aera Energy LLC

• Website: aeraenergy.com
• Ownership type: Corporate
• Headquarters: Bakersfield, California, United States (USA)
• Employee distribution: United States (USA) 99%, Other 1%
• Latest funding: $2.1B, February 2024
• Founded year: 1997
• Headcount: 1001-5000
• LinkedIn: aera-energy-llc

Aera Energy LLC, founded in 1997 and based in Bakersfield, California, is an energy company focused on oil and natural gas exploration and production. The company plays a crucial role in supplying energy resources to both individuals and businesses across California. Aera is not only involved in traditional oil and gas operations but is also investing in lower carbon energy solutions, showcasing a commitment to innovation and environmental responsibility. With a workforce of approximately 648 employees, Aera operates primarily in Kern, Fresno, Monterey, and Ventura counties, which are vital areas for oil production in California. The company is a subsidiary of California Resources Corporation, which enhances its operational capabilities and market presence. Aera's recent funding of $2.1 billion in February 2024 further underscores its financial strength and ongoing relevance in the energy sector.

2. Chem-Energy Corporation

• Website: chem-energy.com
• Ownership type: Private
• Headquarters: Garden Grove, California, United States (USA)
• Employee distribution: United States (USA) 33%, Nigeria 33%, China 33%
• Founded year: 1990
• Headcount: 1001-5000
• LinkedIn: chem-energy-corporation

Chem-Energy Corporation, founded in 1990 and based in Garden Grove, California, is a private company specializing in the trading of petroleum products and the refining of crude oil. The company operates in both domestic and international markets, providing a range of services that include the supply of gasoline, diesel, and petrochemicals. Chem-Energy also engages in project development related to refineries and power plants, showcasing their capability to manage and operate oil terminals and vessels. Their expertise extends to consulting services for companies interested in joint ventures and project management in the energy sector. With a workforce that spans the USA, Nigeria, and China, Chem-Energy has established itself as a player in the oil and gas industry, producing over 250,000 barrels of oil equivalent per day through various projects. They also have a subsidiary, Ship N Oil Corporation, which offers shipping services tailored to the oil and chemicals industries.

3. The Termo Company

• Website: termoco.com
• Ownership type: Private
• Headquarters: Long Beach, California, United States (USA)
• Employee distribution: United States (USA) 91%, Iran 9%
• Founded year: 1933
• Headcount: 11-50
• LinkedIn: the-termo-company

The Termo Company, based in Long Beach, California, is an oil and gas exploration and production company founded in 1933. With a workforce of approximately 33 employees, the company specializes in the extraction of crude oil and natural gas, providing essential resources to the energy sector. Termo operates in various locations across the United States, including California and Louisiana, and has a notable presence in the Los Angeles Basin. The company emphasizes the use of advanced technologies and practices to minimize its environmental footprint while pursuing profitable investment opportunities. Their operational strategy includes a mix of owned and joint venture interests, with a focus on optimizing production and exploring new opportunities. Termo's commitment to safety, environmental stewardship, and community engagement reflects their dedication to responsible energy production. They have maintained a conservative financial posture, which has allowed them to navigate the industry's ups and downs effectively.

4. Dcor, L.L.C.

• Website: dcorllc.com
• Ownership type: Private
• Headquarters: Oxnard, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2001
• Headcount: 201-500
• LinkedIn: dcor-l.l.c.

Dcor, L.L.C. is an energy company based in Oxnard, California, with a strong focus on offshore energy production along the West Coast. Founded in 2001, the company has built a solid reputation over its two decades of operation. Dcor is dedicated to operational excellence, ensuring that its practices align with the environmental needs of the communities it serves. The company prioritizes safety and health for its employees, which is reflected in its comprehensive safety protocols. Dcor utilizes advanced technology and extensive operational experience to optimize production from its assets, contributing to the energy sector while maintaining a commitment to environmental stewardship. With a workforce of approximately 300 employees, Dcor plays a significant role in the offshore energy landscape.

5. Signal Hill Petroleum, Inc.

• Website: shpi.net
• Ownership type: Family Owned
• Headquarters: Signal Hill, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1984
• Headcount: 51-200
• LinkedIn: signal-hill-petroleum-inc.

Signal Hill Petroleum, Inc. is a privately owned energy company based in Signal Hill, California. Founded in 1984, the company specializes in the exploration and production of oil and gas, particularly in urban environments. With a portfolio that includes over 400 operational wells, Signal Hill Petroleum produces more than one million barrels of crude oil annually. The company operates primarily in the Long Beach/Signal Hill Oilfield, recognized as a super giant field with a rich history of oil production. In addition to its core oil and gas operations, Signal Hill Petroleum is involved in real estate development, showcasing a multifaceted approach to business. The company emphasizes sustainability and community responsibility, actively engaging with local stakeholders to minimize the impact of its operations. Their innovative drilling techniques and commitment to environmental stewardship further highlight their role in the industry.

6. Pacific Coast Energy Company LP

• Website: pceclp.com
• Ownership type: Private
• Headquarters: Orcutt, California, United States (USA)
• Employee distribution: United States (USA) 88%, United Kingdom (UK) 12%
• Founded year: 1997
• Headcount: 11-50
• LinkedIn: pacific-coast-energy-company-lp

Pacific Coast Energy Company LP, headquartered in Orcutt, California, is an independent energy company established in 1997. The firm operates primarily in oil production, owning assets in Santa Barbara, Los Angeles, and Orange Counties. Founded by engineers trained at Stanford University, the company employs advanced engineering and computer modeling techniques to enhance field performance and returns. PCEC is committed to providing low-cost energy solutions while adhering to stringent environmental regulations, which they claim makes their operations among the least impactful in the world. The company actively engages with local communities, supporting education and public services through its tax contributions. PCEC believes in the importance of local energy sourcing to ensure California's energy security, especially given the state's unique position as an 'Energy Island.' Their operations are characterized by stable, low-decline production, and they are involved in the ongoing transition towards renewable energy sources.

7. Ramos Oil

• Website: ramosoil.com
• Ownership type: Family Owned
• Headquarters: Dixon, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1951
• Headcount: 51-200
• LinkedIn: ramos-oil

Ramos Oil Company, founded in 1951 and based in Dixon, California, is a family-owned petroleum supplier. The company specializes in providing high-quality fuel, oil, lubricants, and additives tailored to various industries, including agriculture, aviation, construction, and transportation. With a workforce of around 60 employees, Ramos Oil has established itself as a reliable partner for businesses requiring efficient fuel management solutions. Their services include Cardlock fueling, bulk fuel transportation, and fleet fueling, which are designed to streamline operations for their clients. Furthermore, Ramos Oil is committed to sustainability, offering renewable diesel fuel and environmentally friendly lubricants, reflecting their adaptation to modern energy demands. The company operates primarily within the United States, ensuring a focused approach to meeting the needs of its domestic clientele.

8. Waveland Energy

• Website: wavelandgroup.com
• Ownership type: Private
• Headquarters: Irvine, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2000
• Headcount: 11-50
• LinkedIn: waveland-capital-group

Waveland Energy, operating under Waveland Capital Group, is an investment firm based in Irvine, California, founded in 2000. The company specializes in energy investments, focusing primarily on oil and gas projects. Waveland Energy has sponsored over 40 energy-related investments, showcasing its commitment to the sector. They engage in acquiring minority equity positions in oil and gas working and mineral interests, particularly in prolific areas such as the Bakken Shale in North Dakota and the Permian Basin in Texas. Their investment strategy emphasizes economic returns while also providing tax benefits associated with energy investments. Waveland collaborates with experienced operators in the industry, leveraging their expertise to identify and capitalize on promising opportunities in the oil and gas market.

9. Arco Gas

• Website: arco.com
• Ownership type: Corporate
• Headquarters: Los Angeles, California, United States (USA)
• Employee distribution: United States (USA) 80%, Brazil 20%
• Latest funding: April 2000
• Founded year: 1966
• Headcount: 11-50
• LinkedIn: arco-gas

Arco Gas, founded in 1966 and based in Los Angeles, California, is a corporate fuel retailer that operates gas stations across various regions in the United States and Mexico. The company specializes in providing quality TOP TIER™ gasoline and renewable diesel, emphasizing affordability and engine performance. Arco Gas offers loyalty programs and business solutions, enhancing customer experience and savings. Their renewable diesel, made from processed vegetable oils and animal fats, showcases their commitment to environmentally friendly fuel options. With a workforce of approximately 107 employees, Arco Gas continues to serve consumers and businesses, focusing on delivering high-quality fuel while ensuring engine protection and performance. The company has not reported any recent funding, indicating a stable operational model since its inception.

10. Chevron Lummus Global (CLG)

• Website: chevronlummus.com
• Ownership type: Private
• Headquarters: Richmond, California, United States (USA)
• Employee distribution: United States (USA) 56%, Netherlands 10%, Czech Republic 10%, Other 25%
• Founded year: 2000
• Headcount: 201-500
• LinkedIn: chevronlummusglobal

Chevron Lummus Global (CLG), established in 2000, operates out of Richmond, California, as a private entity with a workforce of approximately 201-500 employees. The company is a joint venture between Chevron U.S.A. Inc. and Lummus Technology, focusing on technology solutions for the production of renewable and conventional transportation fuels, premium base oils, and sustainable petrochemicals. CLG's portfolio includes advanced hydroprocessing technologies that optimize production efficiency and help refineries meet stringent environmental standards. Their innovative processes, such as the Biofuels ISOCONVERSION and ISOTERRA technologies, enable the conversion of low-cost waste feedstocks into renewable fuels, showcasing their commitment to sustainability. CLG's expertise extends to the design and licensing of hydroprocessing plants, with a proven track record of enhancing product quality and yield while minimizing emissions. This positions CLG as a vital contributor to the oil and gas industry, particularly in the context of increasing regulatory pressures and the shift towards cleaner energy sources.

11. Amber Resources

• Website: dionandsons.com
• Ownership type: Private
• Headquarters: Long Beach, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1930
• Headcount: 201-500
• LinkedIn: amberresources

Amber Resources, known as Dion & Sons, is a private petroleum distributor based in Long Beach, California. Founded in 1930, the company has built a solid reputation for providing fuel and lubricant solutions tailored to the needs of various industries, including construction, transportation, and emergency services. With a commitment to local delivery and exceptional customer service, Dion & Sons has been serving Southern California for over nine decades. They offer a comprehensive range of products, including diesel and gasoline, specialty fuels, and a variety of lubricant solutions. The company is also recognized as a significant distributor of Mil-Spec lubricants and corrosion preventives on the West Coast. Their operations are supported by a dedicated team that ensures 24/7 service and local dispatch, making them a reliable partner for businesses requiring consistent fuel supply and technical support.

12. Wood Oil Company

• Website: woodoilcompany.com
• Ownership type: Corporate
• Headquarters: Gardena, California, United States (USA)
• Latest funding: $22.6M, October 2001
• Founded year: 1942
• Headcount: 11-50
• LinkedIn: wood-oil-company

Wood Oil Company, based in Gardena, California, has been a player in the petroleum industry since its inception in 1942. This corporate entity specializes in a range of petroleum products, including oils and lubricants, catering primarily to businesses and organizations. Their service offerings extend beyond product supply; they also provide critical services such as fuel delivery, tank cleaning, and emergency response. With a workforce of 11 to 50 employees, the company is agile enough to respond to customer needs while maintaining a focus on quality and reliability. Their operational history and continued service provision underscore their relevance in the oil and gas sector, making them a noteworthy entity in this field.

13. Sturdy Oil Company, Inc.

• Website: sturdyoil.com
• Ownership type: Family Owned
• Headquarters: Salinas, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1933
• Headcount: 51-200
• LinkedIn: sturdy-oil-company-inc.

Sturdy Oil Company, Inc., based in Salinas, California, has been a key player in the petroleum distribution sector since its founding in 1933. The company specializes in supplying a wide range of fuels and lubricants tailored to the needs of businesses in agriculture, transportation, and industrial sectors. Sturdy Oil ensures reliable product delivery and offers services such as fleet fueling and technical assistance, which are crucial for maintaining operational efficiency for their clients. With a workforce of around 19 employees, the company operates multiple locations in the Salinas Valley and surrounding areas, ensuring that customers have access to fuel and lubricants whenever needed. Their product offerings include gasoline, diesel, industrial lubricants, and specialized agricultural lubricants, catering to a variety of customer requirements. Sturdy Oil's commitment to customer service and local engagement underscores its relevance in the oil and gas industry.

14. Kenai Drilling Limited

• Website: kenaidrilling.com
• Ownership type: Private
• Headquarters: Bakersfield, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1988
• Headcount: 51-200
• LinkedIn: kenai-drilling-limited

Kenai Drilling Limited, based in Bakersfield, California, is a private drilling services company that has been operational since 1988. The firm provides contract drilling services for the exploration and development of oil, gas, and geothermal wells across the western United States, including states like California, Nevada, and Utah, as well as in the mid-continent region, such as Oklahoma and Texas. With a fleet of specialized drilling rigs, Kenai Drilling is equipped to handle various drilling requirements, showcasing their ability to adapt to the industry's fluctuations. The company emphasizes safety and technical expertise, employing a comprehensive Safety Management System certified by the International Association of Drilling Contractors (IADC). This focus on safety and reliability has helped Kenai Drilling maintain a strong presence in the energy sector, catering to the needs of exploration and development projects.

15. Kronos Energy S.A.S. E.S.P

• Website: kronosenergy.co
• Ownership type: Private
• Headquarters: Chico, California, United States (USA)
• Employee distribution: Colombia 100%
• Founded year: 2012
• Headcount: 51-200
• LinkedIn: kronos-energy-s.a-e.s.p

Kronos Energy S.A.S. E.S.P is an energy provider based in Chico, California, with operations primarily in Colombia. Founded in 2012, the company focuses on the supply and infrastructure for natural gas and hydrocarbons. They serve large consumers across various industries, emphasizing cost-effective and sustainable energy solutions. Kronos Energy is involved in the transportation and commercialization of natural gas, aiming to enhance operational efficiency for its clients while promoting environmentally friendly practices. Their mission is to meet the national demand for natural gas, contributing to the massification of this energy source in Colombia. The company is committed to high standards of quality and sustainability, positioning itself as a significant player in the local market for natural gas distribution and commercialization.

16. Mieco INC.

• Website: mieco.com
• Ownership type: Private
• Headquarters: Long Beach, California, United States (USA)
• Employee distribution: United States (USA) 94%, Canada 6%
• Founded year: 1984
• Headcount: 51-200
• LinkedIn: mieco-inc.

Mieco INC., founded in 1984 and headquartered in Long Beach, California, is an energy trading company that focuses on the trading of refined petroleum products and natural gas. As a wholly owned subsidiary of Marubeni Corporation, Mieco operates through several divisions located in key markets across the United States, including Houston, Newark, Westlake, and Denver. The company provides a range of services, including energy procurement, risk management, and consulting, catering to industrial and commercial clients such as power plants and distribution companies. Mieco's trading activities involve the physical and financial aspects of energy markets, ensuring they meet the needs of their customers while managing associated risks. Their expertise in gas marketing and trading, along with their established relationships in the industry, positions them as a significant player in the energy sector.

17. SC Fuels

• Website: scfuels.com
• Ownership type: Corporate
• Headquarters: Orange, California, United States (USA)
• Employee distribution: United States (USA) 99%
• Latest funding: December 2021
• Founded year: 1930
• Headcount: 501-1000
• LinkedIn: sc-fuels

SC Fuels, based in Orange, California, is a prominent fuel distributor that has been serving the petroleum industry since its founding in 1930. The company specializes in delivering a variety of petroleum products, including unbranded and branded fuel, lubricants, and chemicals. With a customer base exceeding 11,000, SC Fuels caters to a wide range of sectors, including agriculture, manufacturing, municipalities, construction, waste management, and food production. Their services include mobile on-site fueling, unbranded wholesale fuel delivery, and a fleet card program designed to streamline fuel management for businesses. SC Fuels operates across more than 15 states in the U.S., demonstrating their extensive reach and commitment to providing reliable fuel solutions. The company prides itself on its customer-centric approach and has built a reputation for dependable service and quality products.

18. Excalibur Drilling Ltd.

• Website: excaliburdrilling.com
• Ownership type: Private
• Headquarters: Brooks, California, United States (USA)
• Employee distribution: Canada 100%
• Founded year: 1994
• Headcount: 51-200
• LinkedIn: excalibur-drilling-ltd-

Excalibur Drilling Ltd. is a private drilling company based in Brooks, California, with a strong operational focus in Western Canada. Founded in 1994, the company has amassed over 25 years of experience in the oil and gas sector, successfully drilling more than 4,000 wells across various basins, including the Deep Basin, Montney, Duvernay, and Cardium. Excalibur operates four ultra-heavy tele-double drilling rigs, which are designed for high performance and efficiency, capable of reaching vertical depths of up to 5,000 meters. The company prides itself on its experienced team, which is trained from the ground up, ensuring a deep understanding of both equipment and operational processes. Their commitment to individual client attention and operational excellence has allowed them to maintain strong relationships within the industry, making them a reliable partner for oil and gas drilling services.

19. Platinum Samandy Ventures (PSV)

• Website: platinumsamandy.com
• Ownership type: Private
• Headquarters: Los Angeles, California, United States (USA)
• Employee distribution: Nigeria 71%, Angola 29%
• Founded year: 2007
• Headcount: 11-50
• LinkedIn: platinum-samandy

Platinum Samandy Ventures (PSV), founded in 2007 and headquartered in Los Angeles, California, is a private service provider in the oil and gas sector. The company specializes in a wide array of services, including offshore and onshore support, project management, and maintenance operations. With a workforce primarily based in Nigeria and Angola, PSV plays a crucial role in supporting businesses within the energy sector. Their operations cover the entire oil and gas value chain, from exploration and production to refining and distribution. PSV is dedicated to enhancing operational efficiency and safety for its clients through innovative solutions and a strong commitment to quality service delivery. The company has also received recognition for its performance, including an Award of Excellence from Chevron, highlighting its focus on safety and effective project management. PSV operates several subsidiaries to meet the demands of its clients, further expanding its capabilities in the industry.

20. RM Parks Inc México

• Website: rmparksinc.mx
• Ownership type: Private
• Headquarters: Porterville, California, United States (USA)
• Employee distribution: Mexico 86%, United States (USA) 14%
• Founded year: 1969
• Headcount: 11-50
• LinkedIn: rmparksincmx

RM Parks Inc México is a private fuel distribution company founded in 1969, with a strong focus on the marketing and supply of gasoline and diesel. The company has a significant operational footprint in Mexico, where it has been active since 2019, and also maintains a presence in the United States. RM Parks serves a wide array of clients, including over 600 gas stations, transporters, and various industrial sectors, ensuring a reliable supply of fuel. The company has established partnerships with well-known brands such as Valero and ARCO, providing franchise opportunities and unbranded fuel options. With a commitment to quality and customer satisfaction, RM Parks continues to expand its operations, recently entering the Sri Lankan market in partnership with Shell, further solidifying its international presence in the fuel distribution industry.

21. DEPA Commercial S.A.

• Website: depa.gr
• Ownership type: Family Owned
• Headquarters: Willowbrook, California, United States (USA)
• Employee distribution: Greece 100%
• Latest funding: Other (Debt), $423.1M, July 2024
• Founded year: 1988
• Headcount: 51-200
• LinkedIn: depa-s.a.

DEPA Commercial S.A. is an energy company based in Greece, established in 1988. The company specializes in the supply and distribution of natural gas, catering to large consumers and gas supply companies. DEPA ensures reliable energy solutions and plays a crucial role in the Greek energy market. In addition to its core business, DEPA is actively involved in renewable energy projects, focusing on hydrogen and biomethane initiatives. This commitment to innovation and sustainability reflects the company's contribution to the energy transition in the region. Recently, DEPA secured funding amounting to approximately €423 million, indicating its ongoing efforts to enhance its operations and expand its influence in the energy sector.

Oil And Gas Insights: Key Companies in California

Company	Headquarter	Size	Founded	Ownership
Aera Energy LLC	Bakersfield, California, United States (USA)	1001-5000	1997	Corporate
Chem-Energy Corporation	Garden Grove, California, United States (USA)	1001-5000	1990	Private
The Termo Company	Long Beach, California, United States (USA)	11-50	1933	Private
Dcor, L.L.C.	Oxnard, California, United States (USA)	201-500	2001	Private
Signal Hill Petroleum, Inc.	Signal Hill, California, United States (USA)	51-200	1984	Family Owned
Pacific Coast Energy Company LP	Orcutt, California, United States (USA)	11-50	1997	Private
Ramos Oil	Dixon, California, United States (USA)	51-200	1951	Family Owned
Waveland Energy	Irvine, California, United States (USA)	11-50	2000	Private
Arco Gas	Los Angeles, California, United States (USA)	11-50	1966	Corporate
Chevron Lummus Global (CLG)	Richmond, California, United States (USA)	201-500	2000	Private
Amber Resources	Long Beach, California, United States (USA)	201-500	1930	Private
Wood Oil Company	Gardena, California, United States (USA)	11-50	1942	Corporate
Sturdy Oil Company, Inc.	Salinas, California, United States (USA)	51-200	1933	Family Owned
Kenai Drilling Limited	Bakersfield, California, United States (USA)	51-200	1988	Private
Kronos Energy S.A.S. E.S.P	Chico, California, United States (USA)	51-200	2012	Private
Mieco INC.	Long Beach, California, United States (USA)	51-200	1984	Private
SC Fuels	Orange, California, United States (USA)	501-1000	1930	Corporate
Excalibur Drilling Ltd.	Brooks, California, United States (USA)	51-200	1994	Private
Platinum Samandy Ventures (PSV)	Los Angeles, California, United States (USA)	11-50	2007	Private
RM Parks Inc México	Porterville, California, United States (USA)	11-50	1969	Private
DEPA Commercial S.A.	Willowbrook, California, United States (USA)	51-200	1988	Family Owned

Want to Find More Oil And Gas Companies?

If you want to find more companies that provide a range of oil production and refining services you can do so with Inven. This list was built with Inven and there are hundreds of companies like these globally.

With Inven you'll also get to know the company's:

• Detailed Ownership: Who owns the company? Is it a public or private company? What is the ownership structure?
• Contact data: Who are the founders and CEO's? What are their emails and phone numbers?
• Financials: How do these companies perform financially? What are their revenues and profit margins?

...and a lot more!