- Advanced Gas Technologies
 - Manufacturer of high purity hydrocarbons - methane, ethylene, ethane and propane. - AltaGas Services Inc.
- Independent midstream natural gas company.
- American Gas Compression Services, Inc.
- Sells natural gas compression equipment, including engines and generators. Rentals and consulting services also available.
- Atlanta Gas Light Company
- Bay State Gas Company
- Serving Massachusetts, New Hampshire, and Maine.
 Beacon Gas
- Low cost gas for domestic users.- Bennetts Gas Supplies
- Suppliers in west Cornwall.
- BG Group@
- BMark Energy
- Provides natural gas, electricity and telephone long distance below utility pricing. Also energy audits.
 Bord Gáis
- Suppliers of natural gas for private and commercial consuption.- BPI Industries
- Natural gas exploration company. Specifically of coalbed methane (CBM).
- Cabot Oil & Gas Corporation
- Independent producer and marketer of natural gas with operations in the northeastern and mid-continent areas of the U.S.
- Calvin Resources Inc.
- Provides natural gas and oil exploration focused on coalbed methane.
- Canadian 88 Energy
- Natural gas producer concentrating on the Western Canadian Sedimentary Basin.
- Carrizo Oil and Gas, Inc. (1)
- Centrica plc@
- Clean Energy
- Designs, builds, and operates natural gas (CNG/LNG) fueling stations.
- CoEnergy, Inc.
- Development of natural gas resources and electric power plants on an integrated basis. Also deals with project finance of waste water treatment and fresh water supply facilities.
- Connecticut Natural Gas Corp
- Conquest Resources
- Specialises in oil and gas development and drilling.
- Disanto Jet Gas
- Cylinder exchange services through neighbourhood convenience stores.
- EEX Corporation
- Independent oil and gas exploration company with exploration and production activities in Texas, Louisiana, the Gulf of Mexico, and Indonesia.
- El Paso Corporation
- Natural gas services company with core businesses in production, pipelines, midstream services, and power.
- Enbridge Consumers Gas@
- Enerdata Ltd
- Publishes North American natural gas prices and related market information; we also sponsor two energy conferences: PowerFair & GasFair.
- Energy Partners, Ltd.@
- Energy Service Investment Corporation
- Specialising in gas processing plants, compression, and pipelines.
- Enterprise Products Partners (2)
- Evergreen Resources, Inc.
- Denver, CO-based natural gas exploration and production company.
- Ferrellgas (1)
- Flogas Ireland Ltd
- Supply and distribution of L.P.G. butane and propane; information on applications and uses and technical and safety information.
- FuelMaker Corporation
- Makers of natural gas and hydrogen fueling systems, including Phill, a product that allows users to fill their natural gas vehicle from home.
- Gás de Portugal
- GDP Holdings includes Transgás, Portgás, LusitaniaGás, GDL - Gás de Lisboa, Setgás, Ibergás, and others.
- Gas Logic
- Training and assessment centre for the heating and plumbing industry.
- Gas Natural Group
- Provides information, services, news, and more. Serving Spain.
- Gas Separation Technology LLC
- Offers processes for removing carbon dioxide, air, or nitrogen from low quality methane sources such as landfill gas, coal mine gas, or low quality natural gas.
- GASTEC NV
- Concentrates on research and development, consultancy, engineering, certification and training in the interest of the natural gas industry
- Gateway Energy
- Owns and operates natural gas gathering, transportation, and distribution systems and related facilities in Texas, Oklahoma, and Louisiana.
- Gaz Métropolitain
- Natural gas distributor.
- Gorgon Australian LNG
- Dealing with liquefied natural gas, developed by CTMS based in Asia aiming to fuel the Pacific Rim.
- HubCo
- Represents a virtual integrated concept for trading in the Bunde/Emden region.
- Keyspan Energy (1)
- Kinder Morgan, Inc. (2)
- Korea Gas Corporation (KOGAS)
- Contributing to the improvement of social welfare and the convenience of people's life through the long-term stable supply of natural gas.
- MarkWest Hydrocarbon
- Natural gas processing and related services, providing compression, gathering, treatment, and natural gas liquid extraction services to gas producers.
- Marson Energy
- Cogeneration and distributed generation services provider offering natural gas, propane, biomass (methane), and diesel fueled generation.
- MichCon
- Provides information on natural gas products, services, appliances, safety and more.
- Mobile Gas Supplies
- Supplies butane and propane bottled gas, mobile heaters, patio heaters, and barbecues.
- Murphy Oil Corporation (1)
- National Fuel Gas Company (1)
- Newpoint Gas Services
- Provides natural gas treatment and gas processing services. Specialises in Arsenic, CO2, H2S, Carbon Dioxide, and Oxygen removal.
- NICOR Inc. (3)
- Nigeria LNG Limited
- Overview of the company, community relations, environmental policy, and news updates.
- NIPSCO Industries
- Power and natural gas provider for northwest Indiana.
- North American Energy
- Supplier of deregulated natural gas service in the Northeast utilizing the existing network of natural gas pipelines.
- Northwest Natural Gas
- Provider for the Pacific Northwest
- NOVA Corp. (2)
- Osaka Gas Co., Ltd.
- One of Japan's leading gas utility companies.
- Phoenix Natural Gas
- Precision Flow Technologies
- Specialises in the field of chemical and gas management. Designs and manufactures HP and UHP gas equipment.
- Production Gathering Company, LLC
- Provides supplies and markets to natural gas producers and end-users.
- Questar Corporation (2)
- Rentech Inc. (2)
- Resource Enterprises
- Offers consulting services and contract drilling, specialising in coalbed methane drainage.
- Roanoke Gas Company
- Supplier of natural gas and propane to the Roanoke, VA and surrounding areas.
- Royale Energy Inc (1)
- Shizuoka Gas
- Gas utility provider to Shizuoka prefecture, Japan.
- Southwest Gas Corporation
- Natural gas for Arizona, Nevada, and California.
- Syntroleum (1)
- Tengasco, Inc. (1)
- Texas Liquids, LLC.
- Supplier of fuel oil, propane, butane, and natural gasoline.
- Top Tier Detergent Gasoline
- Standard for gasoline performance.
- Tri-gas
- A commercial, industrial, agricultural and residential supplier of propane and gas appliances.
- Vaquero Energy
- Exploration, development, and production of natural gas and crude oil. Formerly Westminster Resources.
- Western Gas Resources, Inc.
- Services include gathering, transporting, compressing and storing natural gas.
- Westport Resources Corporation (1)
- Wisconsin Public Service Corporation
- Regulated electric and gas utility serving Northeast and Central Wisconsin and Menominee Michigan.
- WPS Resources Corporation@
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