The natural gas industry in California is a crucial segment of the state’s energy scene. Companies within this sector focus on exploration, production, and the distribution of natural gas, working to meet both commercial and residential energy demands. California is home to a blend of small startups and major players, each driving innovation toward cleaner energy production. With a growing emphasis on sustainability and reducing carbon footprints, natural gas companies are increasingly exploring renewable energy sources and technologies. The industry is poised for evolution as it navigates the shift toward decarbonization and renewable resources, highlighted by significant investment trends.

This list features 20 companies actively participating in California's natural gas sector, ranging from established multinationals to smaller firms. These companies employ different specialties, including oil and gas extraction, energy trading, and cutting-edge technologies for energy efficiency. The workforces vary significantly, from lean teams of fewer than 10 to large corporations with thousands of employees. Founded in a broad time span, from 1933 to recent ventures in 2021, this collection reflects a rich history alongside innovative advancements shaping California’s energy future.

Read on to discover essential insights about California's top natural gas companies.

Top 20 Natural Gas Companies 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 that specializes in oil and natural gas exploration and production. With a workforce of approximately 648 employees, Aera plays a crucial role in supplying energy resources to California, a state that relies heavily on both oil and natural gas. The company operates in several counties, including Kern, Fresno, Monterey, and Ventura, where it engages in various operations to extract and produce these vital resources. Aera Energy is also a subsidiary of California Resources Corporation, which enhances its operational capabilities and market presence. In addition to its core business, Aera is dedicated to community support and responsible energy practices, investing in initiatives that promote lower carbon energy solutions. This commitment reflects a recognition of the evolving energy landscape and the importance of sustainability in the industry.

2. 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, serving various businesses and organizations in the energy sector. Over its eight decades of operation, Termo has developed a reputation for exploring profitable investment opportunities while maintaining a commitment to integrity and operational excellence. The company operates in multiple locations, including California and Louisiana, and employs advanced technologies to reduce its environmental footprint. Their operational strategy includes a focus on safety, environmental responsibility, and community engagement, which reflects their dedication to sustainable practices in the energy industry. Termo's mission emphasizes the importance of providing essential energy resources while enhancing shareholder value through careful exploration and development efforts.

3. 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 primarily to large consumers and gas supply companies. DEPA ensures reliable energy solutions while also engaging in various renewable energy projects. Their involvement extends to hydrogen and biomethane initiatives, reflecting a commitment to the energy transition in the region. Recently, DEPA secured funding amounting to approximately 423 million euros, which will support their ongoing projects and expansion efforts. The company operates entirely within Greece, emphasizing its local focus and expertise in the natural gas sector.

4. Pacific Summit Energy LLC

• Website: pacificsummitenergy.com
• Ownership type: Private
• Headquarters: Irvine, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2004
• Headcount: 51-200
• LinkedIn: pacific-summit-energy

Pacific Summit Energy LLC, based in Irvine, California, is an energy trading company that has been operational since 2004. With a workforce of around 81 employees, the company specializes in natural gas, liquefied natural gas (LNG), power, and environmental solutions. They serve a variety of clients, including wholesale trading companies and industrial end users, by providing reliable energy sources and helping manage carbon footprints. Their commitment to sustainability is evident in their strategies that align with global carbon neutrality standards. Notably, Pacific Summit Energy has secured a significant 20-year Terminal Service Agreement with Dominion Energy Cove Point LNG, which allows them to play a crucial role in the LNG market. Their operations extend across the United States, with a focus on both domestic and international energy trading, reflecting their adaptability in a changing energy environment.

5. 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, founded in 2012 and based in Chico, California, operates primarily in Colombia. The company is dedicated to providing energy solutions through the infrastructure necessary for the transportation and commercialization of natural gas and hydrocarbons. With a workforce of approximately 32 employees, Kronos Energy focuses on serving large consumers in various industries, emphasizing cost-effective and sustainable energy practices. Their mission is to meet the national demand for natural gas supply while promoting projects that enhance operational efficiency and environmental responsibility. The company is committed to high standards of quality and aims to position itself among the top players in the natural gas sector in Colombia over the next decade.

6. Applied LNG

• Website: appliedlng.com
• Ownership type: Private
• Headquarters: Los Angeles, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1995
• Headcount: 11-50
• LinkedIn: applied-natural-gas-fuels-inc-

Applied LNG is an energy solutions provider based in Los Angeles, California, specializing in liquefied natural gas (LNG) and renewable natural gas (RNG). Founded in 1995, the company has built a reputation for producing, marketing, and selling LNG to various sectors, including transportation, industrial, and municipal markets across the United States and Mexico. With a production capacity nearing 100 million gallons of LNG annually, Applied LNG has played a pivotal role in supporting the transition to cleaner fuels. They offer a range of services, including mobile fueling solutions, logistics support, and technical assistance, ensuring that their clients can efficiently utilize LNG and RNG. Their focus on sustainability aligns with increasing regulatory pressures for cleaner energy, making them a relevant player in the natural gas industry.

7. Terraform Industries

• Website: terraformindustries.com
• Ownership type: Venture Capital
• Headquarters: Burbank, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Seed, $6.0M, April 2023
• Founded year: 2021
• Headcount: 11-50
• LinkedIn: terraformindustries

Terraform Industries, founded in 2021 and based in Burbank, California, is an energy technology company dedicated to producing synthetic natural gas from sunlight and air. The firm targets utility companies and energy providers looking for carbon-neutral solutions. Their innovative technology includes direct air capture and green hydrogen production, which are integral to their mission of contributing to a sustainable energy future. Recently, Terraform Industries raised approximately $6 million in seed funding to accelerate their development efforts. They have successfully produced carbon-neutral pipeline-grade synthetic natural gas, achieving a remarkable 99.4% methane purity. This achievement underscores their capability to deliver a viable alternative to traditional fossil fuels, positioning them as a noteworthy player in the natural gas industry.

8. Hexagon Agility

• Website: hexagonagility.com
• Ownership type: Corporate
• Headquarters: Costa Mesa, California, United States (USA)
• Employee distribution: United States (USA) 79%, Canada 16%, Other 5%
• Latest funding: December 2018
• Founded year: 1996
• Headcount: 501-1000
• LinkedIn: agility-fuel-solutions

Hexagon Agility, based in Costa Mesa, California, is a clean fuel solutions provider that specializes in natural gas systems tailored for commercial vehicles. Founded in 1996, the company has evolved significantly, merging with other leaders in the alternative fuel space to enhance its offerings. Hexagon Agility provides a comprehensive range of products, including RNG and CNG cylinders, storage systems, and technical support services. They primarily serve original equipment manufacturers (OEMs), dealers, and fleet operators, ensuring efficient use of their products through training and support. With a workforce of over 400 employees and a strong presence in North America and Canada, Hexagon Agility has established itself as a vital contributor to the clean fuel movement, focusing on reducing emissions and promoting sustainable transportation solutions.

9. 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 a private energy trading company that specializes in the trading of refined petroleum products and natural gas. As a subsidiary of Marubeni Corporation, Mieco operates across multiple divisions in the United States, including Houston and Denver, where they focus on natural gas marketing and trading. The company serves a range of industrial and commercial clients, providing solutions for energy procurement, risk management, and consulting services. Mieco's Denver division is particularly notable for its integrated gas marketing and trading capabilities, engaging with various market participants from producers to utilities. Their expertise in transport optimization, storage management, and risk management strategies further solidifies their role in the natural gas industry. Mieco's operations are supported by a network of offices and affiliates, allowing them to effectively navigate the complexities of the energy market.

10. Membrane Technology and Research (MTR) , Inc

• Website: mtrinc.com
• Ownership type: Private
• Headquarters: Newark, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Other (Grant), $4.6M, April 2024
• Founded year: 1982
• Headcount: 51-200
• LinkedIn: membrane-technology-and-research-inc

Membrane Technology and Research (MTR), Inc. is a private company based in Newark, California, founded in 1982. MTR specializes in membrane-based separation systems tailored for the petrochemical, natural gas, and refining industries. The company has developed a range of innovative solutions that address critical challenges in these sectors, particularly in carbon capture and industrial separations. MTR's offerings include systems for fuel gas conditioning, nitrogen removal, and CO2 removal, which are essential for optimizing natural gas processing. Their manufacturing and engineering design capabilities are supported by a dedicated team of specialists, ensuring that their solutions meet industry standards and customer needs. MTR has also received funding, with a recent grant of $4.6 million in April 2024, indicating ongoing investment in their technology and operations.

11. Upwing Energy

• Website: upwingenergy.com
• Ownership type: Venture Capital
• Headquarters: Cerritos, California, United States (USA)
• Employee distribution: United States (USA) 98%, Other 2%
• Latest funding: Series C, $22.0M, November 2022
• Founded year: 2016
• Headcount: 51-200
• LinkedIn: upwing-energy

Upwing Energy, founded in 2016 and based in Cerritos, California, is an energy services company that specializes in natural gas production. The firm is dedicated to providing innovative solutions that enhance production efficiency while minimizing environmental impact. Their flagship product, the Subsurface Compressor System, is designed to significantly increase the production and recoverability of natural gas from existing wells. Upwing Energy offers a comprehensive suite of services that includes detailed analysis, strategic planning, deployment, and continuous monitoring of gas extraction operations. This end-to-end approach not only improves operational efficiency but also supports the sustainability goals of their clients. The company has attracted significant venture capital, securing $22 million in their latest funding round in November 2022, which underscores their growth potential and the confidence investors have in their technology and business model.

12. Nikkiso Clean Energy & Industrial Gases

• Website: nikkisoceig.com
• Ownership type: Private
• Headquarters: Temecula, California, United States (USA)
• Employee distribution: United States (USA) 56%, India 18%, South Korea 9%, Other 17%
• Founded year: 1953
• Headcount: 1001-5000
• LinkedIn: nikkiso-clean-energy-and-industrial-gases

Nikkiso Clean Energy & Industrial Gases, based in Temecula, California, is a private industrial gas manufacturer with a history dating back to 1953. The company specializes in clean energy solutions, providing a range of products that include cryogenic pumps, liquefiers, and vaporization systems tailored for hydrogen, natural gas, and other industrial gases. Nikkiso serves a variety of industries, particularly oil and gas, manufacturing, and marine sectors, where they deliver innovative solutions for gas processing and fueling. Their commitment to advancing clean energy technologies is evident in their product offerings, which include LNG fueling stations and hydrocarbon turboexpanders. With a workforce of over 700 employees and a global presence, Nikkiso is well-positioned to meet the increasing demand for natural gas solutions.

13. Nikkiso Cryoquip

• Website: cryoquip.com
• Ownership type: Private
• Headquarters: Murrieta, California, United States (USA)
• Employee distribution: United States (USA) 80%, Malaysia 20%
• Founded year: 1961
• Headcount: 201-500
• LinkedIn: cryoquip

Nikkiso Cryoquip, part of Nikkiso Clean Energy & Industrial Gases, is a company based in Murrieta, California, specializing in cryogenic technology and industrial gases. Founded in 1961, Nikkiso Cryoquip has built a reputation for providing innovative solutions in the natural gas sector. The company offers a range of products including natural gas liquefiers, pumps, vaporization and regasification systems, and fueling stations for LNG and CNG applications. Their technology plays a vital role in the efficient management of natural gas, catering to various industries such as oil and gas, food and beverage, and pharmaceuticals. With a global presence and a focus on enhancing operational efficiency and sustainability, Nikkiso Cryoquip is well-positioned to meet the evolving needs of the natural gas market.

14. Wellhead Electric Company, Inc.

• Website: wellhead.com
• Ownership type: Private
• Headquarters: Sacramento, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1982
• Headcount: 51-200
• LinkedIn: wellhead-electric-company-inc-

Wellhead Electric Company, Inc. is a privately held energy company based in Sacramento, California, founded in 1982. The company specializes in power generation and energy storage solutions, with a significant focus on natural gas, solar energy, and hybrid systems. Wellhead has developed and operated over 600 MW of power generation facilities, including eight natural gas power plants across California and neighboring states. Their portfolio includes peaker plants, combined-cycle plants, and co-generation facilities. Wellhead is recognized for its innovative approach, particularly with its Hybrid EGT technology, which integrates traditional gas-fired power plants with battery energy storage to improve grid efficiency and lower emissions. The company also provides permitting, operations, and maintenance services, demonstrating a comprehensive understanding of the energy generation process.

15. Quantum Fuel Systems LLC

• Website: qtww.com
• Ownership type: Private
• Headquarters: Lake Forest, California, United States (USA)
• Employee distribution: United States (USA) 92%, Brazil 4%, Canada 4%
• Founded year: 2016
• Headcount: 51-200
• LinkedIn: quantum-technologies

Quantum Fuel Systems LLC, founded in 2016 and based in Lake Forest, California, is a private manufacturing company that specializes in natural gas and hydrogen storage solutions. The company designs and produces advanced compressed natural gas (CNG) fuel systems and virtual pipeline trailers, which are essential for the transportation and energy sectors. Their products, such as the Q-Cab and Q-Rail fuel systems, are engineered to enhance safety and efficiency in gas storage and transportation. Quantum's innovative approach includes the use of lightweight composite materials in their Q-Lite tanks, which are recognized for their high capacity and durability. The company serves a variety of applications, from medium- to heavy-duty trucks, and addresses the needs of customers in areas with limited infrastructure. Quantum's commitment to improving alternative fuel technology positions them as a significant player in the natural gas industry.

16. United Mechanical

• Website: acdcom.com
• Ownership type: Private
• Headquarters: Santa Ana, California, United States (USA)
• Employee distribution: United States (USA) 83%, China 17%
• Founded year: 1950
• Headcount: 51-200
• LinkedIn: acd-llc

United Mechanical, part of Nikkiso Clean Energy & Industrial Gases, has been a significant player in the manufacturing of cryogenic and gas processing solutions since its inception in 1950. Based in Santa Ana, California, the company employs around 77 people and operates primarily in the United States, with a notable presence in China. Their product line includes hydrogen liquefiers, pumps, and integrated cryogenic solutions, with a strong emphasis on natural gas applications. They provide essential equipment such as liquefiers, pumps, and fueling stations for LNG and CNG, catering to the growing demand for clean energy solutions. United Mechanical's commitment to innovation and efficiency in energy solutions makes them a relevant entity in the natural gas industry.

17. Nikkiso ACD

• Website: acdllc.com
• Ownership type: Private
• Headquarters: Santa Ana, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1950
• Headcount: 51-200
• LinkedIn: acdllc

Nikkiso ACD, based in Santa Ana, California, has been a player in the cryogenic systems and industrial gases market since its founding in 1950. The company specializes in designing and manufacturing equipment that supports the natural gas industry, including liquefiers, pumps, and vaporization systems. Their products are integral to the processing and transportation of natural gas, making them a key contributor to the energy sector. Nikkiso ACD operates globally, providing innovative solutions that cater to various industries, including oil and gas, food and beverage, and pharmaceuticals. Their commitment to clean energy is evident in their focus on developing technologies that enhance the efficiency and sustainability of natural gas operations.

18. 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 emphasis on offshore energy production along the West Coast. Founded in 2001, the company has built a reputation for operational excellence and a commitment to environmental stewardship. With a workforce of approximately 164 employees, Dcor focuses on optimizing production from its assets while ensuring safety and health standards are met. Their approach combines advanced technology with decades of operational experience, allowing them to navigate the complexities of offshore energy extraction. Dcor's dedication to responsible production practices positions them as a significant player in the offshore natural gas sector, catering to the needs of various stakeholders in the energy industry.

19. Tri Pacific Supply INC

• Website: tripacific.net
• Ownership type: Private
• Headquarters: Rocklin, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1989
• Headcount: 1-10
• LinkedIn: tri-pacific-supply-inc

Tri Pacific Supply INC, founded in 1989 and based in Rocklin, California, operates as a private company with a small team of around 19 employees. The company specializes in the natural gas sector, focusing on measurement, control, and distribution products. They serve natural gas utilities and related businesses across several states, including California, Colorado, and Idaho. Tri Pacific Supply INC offers a range of products, including gas measurement systems, control valves, and odorization solutions. They also provide essential services such as product training, engineering support, and field assistance, ensuring that their clients are well-equipped to handle the complexities of natural gas operations. Their partnerships with reputable manufacturers like Mooney Regulators and Becker Control Valves enhance their product offerings and reinforce their commitment to quality and safety in the industry.

20. MBS Engineering

• Website: mbs.engineering
• Ownership type: Private
• Headquarters: San Ramon, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1997
• Headcount: 11-50
• LinkedIn: mb-services-inc-

MBS Engineering, founded in 1997 and based in San Ramon, California, is a private engineering contractor specializing in natural gas and underground utility services. With a team of 11 to 50 employees, the company has carved out a significant niche in the industry by offering a range of services that include gas leak detection, plumbing, excavation, and seismic shut-off valve installation. MBS Engineering is particularly noted for its commitment to safety and compliance, ensuring that gas systems are reliable and meet regulatory standards. They serve various sectors, including hospitality, healthcare, and education, and have established a reputation for solving complex challenges related to natural gas systems. Their proactive approach to gas leak surveys and emergency repairs, along with their use of advanced leak detection technology, underscores their expertise in maintaining safe gas infrastructure. MBS Engineering is also recognized for its extensive experience, having installed more than 100,000 seismic shut-off valves across California, making them a key player in the state's natural gas safety initiatives.

Natural Gas Companies Insights: Key Companies in California

Company	Headquarter	Size	Founded	Ownership
Aera Energy LLC	Bakersfield, California, United States (USA)	1001-5000	1997	Corporate
The Termo Company	Long Beach, California, United States (USA)	11-50	1933	Private
DEPA Commercial S.A.	Willowbrook, California, United States (USA)	51-200	1988	Family Owned
Pacific Summit Energy LLC	Irvine, California, United States (USA)	51-200	2004	Private
Kronos Energy S.A.S. E.S.P	Chico, California, United States (USA)	51-200	2012	Private
Applied LNG	Los Angeles, California, United States (USA)	11-50	1995	Private
Terraform Industries	Burbank, California, United States (USA)	11-50	2021	Venture Capital
Hexagon Agility	Costa Mesa, California, United States (USA)	501-1000	1996	Corporate
Mieco INC.	Long Beach, California, United States (USA)	51-200	1984	Private
Membrane Technology and Research (MTR) , Inc	Newark, California, United States (USA)	51-200	1982	Private
Upwing Energy	Cerritos, California, United States (USA)	51-200	2016	Venture Capital
Nikkiso Clean Energy & Industrial Gases	Temecula, California, United States (USA)	1001-5000	1953	Private
Nikkiso Cryoquip	Murrieta, California, United States (USA)	201-500	1961	Private
Wellhead Electric Company, Inc.	Sacramento, California, United States (USA)	51-200	1982	Private
Quantum Fuel Systems LLC	Lake Forest, California, United States (USA)	51-200	2016	Private
United Mechanical	Santa Ana, California, United States (USA)	51-200	1950	Private
Nikkiso ACD	Santa Ana, California, United States (USA)	51-200	1950	Private
Dcor, L.L.C.	Oxnard, California, United States (USA)	201-500	2001	Private
Tri Pacific Supply INC	Rocklin, California, United States (USA)	1-10	1989	Private
MBS Engineering	San Ramon, California, United States (USA)	11-50	1997	Private

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