Atmos Energy Corporation, together with its subsidiaries, engages in the regulated natural gas distribution, and pipeline and storage businesses in the United States. It operates through two segments, Distribution, and Pipeline and Storage. The Distribution segment is involved in the regulated natural gas distribution and related sales operations in eight states. This segment distributes natural gas to approximately three million residential, commercial, public authority, and industrial customers. As of September 30, 2021, it owned 71,921 miles of underground distribution and transmission mains. The Pipeline and Storage segment engages in the pipeline and storage operations. This segment transports natural gas for third parties and manages five underground storage reservoirs in Texas; and provides ancillary services to the pipeline industry, including parking arrangements, lending, and inventory sales. As of September 30, 2021, it owned 5,699 miles of gas transmission lines. Atmos Energy Corporation was founded in 1906 and is headquartered in Dallas, Texas.

NiSource Inc., an energy holding company, operates as a regulated natural gas and electric utility company in the United States. It operates through two segments, Gas Distribution Operations and Electric Operations. The company distributes natural gas to approximately 853,000 customers in northern Indiana, as well as approximately 2.4 million residential, commercial, and industrial customers in Ohio, Pennsylvania, Virginia, Kentucky, and Maryland. It operates approximately 54,600 miles of distribution main pipelines, as well as associated individual customer service lines; and 1,000 miles of transmission main pipelines. The company generates, transmits, and distributes electricity to approximately 483,000 customers in 20 counties in the northern part of Indiana, as well as engages in wholesale electric and transmission transactions. It owns and operates coal-fired electric generating stations with a capacity of 722 megawatts (MW) in Wheatfield and 455 MW in Michigan City; combined cycle gas turbine with a capacity of 563 MW in West Terre Haute; natural gas generating units with a capacity of 155 MW in Wheatfield; hydro generating plants with a capacity of 9 MW in Carroll County and 7 MW in White County; and wind generating units with a capacity of 102 MW and 302 MW in White County, Indiana. The company was formerly known as NIPSCO Industries, Inc. and changed its name to NiSource Inc. in April 1999. NiSource Inc. was founded in 1847 and is headquartered in Merrillville, Indiana.

AltaGas Ltd. operates as an energy infrastructure company in North America. The company operates through Utilities and Midstream segments. The Utilities segment owns and operates rate-regulated natural gas distribution and storage utilities in Maryland, Virginia, Delaware, Pennsylvania, Ohio, and the District of Columbia serving approximately 1.7 million customers. This segment also provides interstate natural gas transportation and storage services. The Midstream segment engages in the natural gas gathering and extraction with 1.2 billion cubic feet per day (Bcf/d) of extraction processing capacity and approximately 1.2 Bcf/d of raw field gas processing capacity; natural gas gathering and extraction business; fractionation and liquids handling business; and natural gas and natural gas liquids marketing activities. It also engages in LPG exports and distribution, logistics, trucking and rail terminals, and liquid storage businesses. In addition, the company operates gas-fired power generation and distribution assets with a generating capacity of 578 MW of power in California and Colorado. It serves residential, commercial, and industrial customers primarily in the Western Canada Sedimentary Basin. AltaGas Ltd. was founded in 1994 and is headquartered in Calgary, Canada.

UGI Corporation distributes, stores, transports, and markets energy products and related services in the United States and internationally. The company operates through four segments: AmeriGas Propane, UGI International, Midstream & Marketing, and UGI Utilities. It distributes propane to approximately 1.4 million residential, commercial/industrial, motor fuel, agricultural, and wholesale customers through 1,600 propane distribution location. The company also distributes liquefied petroleum gases (LPG) to residential, commercial, industrial, agricultural, wholesale and automobile fuel customers; and provides logistics, storage, and other services to third-party LPG distributors. In addition, it engages in the retail sale of natural gas, liquid fuels, and electricity to approximately 12,600 residential, commercial, and industrial customers at 42,400 locations. Further, the company distributes natural gas to approximately 672,000 customers in eastern and central Pennsylvania counties through its distribution system of approximately 12,400 miles of gas mains; and supplies electricity to approximately 62,500 customers in northeastern Pennsylvania through 2,600 miles of lines and 14 substations. Additionally, it operates electric generation facilities, which include coal-fired, landfill gas-fueled, solar-powered, and natural gas-fueled facilities; a natural gas liquefaction, storage, and vaporization facility; propane storage and propane-air mixing stations; and rail transshipment terminals. It also manages natural gas pipeline and storage contracts; develops, owns, and operates pipelines, gathering infrastructure, and gas storage facilities. UGI Corporation was incorporated in 1991 and is based in King of Prussia, Pennsylvania.

Brookfield Infrastructure Corporation, together with its subsidiaries, owns and operates regulated natural gas transmission systems in Brazil. The company also engages in the regulated gas and electricity distribution operations in the United Kingdom; and electricity transmission and distribution, as well as gas distribution in Australia. It operates approximately 2,000 kilometers of natural gas transportation pipelines in the states of Rio de Janeiro, Sao Paulo, and Minas Gerais; 3.9 million gas and electricity connections; and 61,000 kilometers of operational electricity transmission and distribution lines in Australia. The company was incorporated in 2019 and is headquartered in New York, New York. Brookfield Infrastructure Corporation is a subsidiary of Brookfield Infrastructure Partners L.P.

Southwest Gas Holdings, Inc., through its subsidiaries, distributes and transports natural gas in Arizona, Nevada, and California. The company operates through Natural Gas Distribution, Utility Infrastructure Services, and Pipeline and Storage segments. It also provides trenching, installation, and replacement of underground pipes, as well as maintenance services for energy distribution systems. As of December 31, 2021, it had 2,159,000 residential, commercial, industrial, and other natural gas customers. Southwest Gas Holdings, Inc. was incorporated in 1931 and is headquartered in Las Vegas, Nevada.

New Jersey Resources Corporation, an energy services holding company, provides regulated gas distribution, and retail and wholesale energy services. The company operates through four segments: Natural Gas Distribution, Clean Energy Ventures, Energy Services, and Storage and Transportation. The Natural Gas Distribution segment offers regulated natural gas utility services to approximately 564,000 residential and commercial customers throughout Burlington, Middlesex, Monmouth, Morris, Ocean, and Sussex counties in New Jersey; provides capacity and storage management services; and participates in the off-system sales and capacity release markets. The Clean Energy Ventures segment invests in, owns, and operates commercial and residential solar projects situated in New Jersey, Connecticut, Rhode Island, and New York. The Energy Services segment offers unregulated wholesale energy management services to other energy companies and natural gas producers, as well as maintains and transacts a portfolio of physical assets consisting of natural gas storage and transportation contracts in the United States and Canada. The Storage and Transportation segment invests in natural gas transportation and storage facilities. It provides heating, ventilation, and cooling services; holds commercial real estate properties; and offers solar equipment installation, and plumbing repair and installation services, as well as engages in the water appliance sale, installation, and servicing activities. The company was incorporated in 1981 and is headquartered in Wall, New Jersey.

Spire Inc., together with its subsidiaries, engages in the purchase, retail distribution, and sale of natural gas to residential, commercial, industrial, and other end-users of natural gas in the United States. The company operates in two segments, Gas Utility and Gas Marketing. It is also involved in the marketing of natural gas. In addition, the company engages in the transportation of propane through its propane pipeline; compression of natural gas; risk management; and other activities. Further, it provides physical natural gas storage services. The company was formerly known as The Laclede Group, Inc. and changed its name to Spire Inc. in April 2016. Spire Inc. was founded in 1857 and is based in St. Louis, Missouri.

ONE Gas, Inc., together with its subsidiaries, operates as a regulated natural gas distribution utility company in the United States. The company operates through three divisions: Oklahoma Natural Gas, Kansas Gas Service, and Texas Gas Service. It provides natural gas distribution services to 2.2 million customers in three states. It serves residential, commercial, and transportation customers. As of December 31, 2021, it operated approximately 41,600 miles of distribution mains; and 2,400 miles of transmission pipelines, as well as had 51.4 billion cubic feet of natural gas storage capacity. ONE Gas, Inc. was founded in 1906 and is headquartered in Tulsa, Oklahoma.

Brookfield Infrastructure Corporation, together with its subsidiaries, owns and operates regulated natural gas transmission systems in Brazil. The company also engages in the regulated gas and electricity distribution operations in the United Kingdom; and electricity transmission and distribution, as well as gas distribution in Australia. It operates approximately 2,000 kilometers of natural gas transportation pipelines in the states of Rio de Janeiro, Sao Paulo, and Minas Gerais; 3.9 million gas and electricity connections; and 61,000 kilometers of operational electricity transmission and distribution lines in Australia. The company was incorporated in 2019 and is headquartered in New York, New York. Brookfield Infrastructure Corporation is a subsidiary of Brookfield Infrastructure Partners L.P.

New Fortress Energy Inc. operates as an integrated gas-to-power infrastructure company that provides energy and development services to end-users worldwide. The company operates in two segments, Terminals and Infrastructure, and Ships. The Terminals and Infrastructure segment engages in the natural gas procurement and liquefaction; and shipping, logistics, facilities and conversion, or development of natural gas-fired power generation. The Ships segment offers floating storage and regasification units, and liquefied natural gas (LNG) carriers which are leased to customers under long-term or spot arrangements. The company operates LNG storage and regasification facility at the Port of Montego Bay, Jamaica; marine LNG storage and regasification facility in Old Harbour, Jamaica; landed micro-fuel handling facility in San Juan, Puerto Rico; marine LNG storage and regasification facility in Sergipe, Brazil; and LNG receiving facility in La Paz, Mexico, as well as Miami facility. New Fortress Energy Inc. was founded in 1998 and is based in New York, New York.

Northwest Natural Holding Company, through its subsidiary, Northwest Natural Gas Company, provides regulated natural gas distribution services to residential, commercial, industrial, and transportation customers in Oregon and Southwest Washington. The company also operates 5.7 billion cubic feet of the Mist gas storage facility contracted to other utilities and third-party marketers; offers natural gas asset management services; and operates an appliance retail center. In addition, it engages in the gas storage, water, non-regulated renewable natural gas, and other investments and activities. The company provides natural gas service through approximately 786,000 meters in Oregon and southwest Washington; and water services to a total of approximately 80,000 people through approximately 33,000 water and wastewater connections in the Pacific Northwest and Texas. Northwest Natural Holding Company was founded in 1859 and is headquartered in Portland, Oregon.

Superior Plus Corp. engages in the energy distribution business. It operates through two segments, U.S. Propane Distribution and Canadian Propane Distribution. The U.S. Propane Distribution segment distributes and sells propane, heating oil, and other liquid fuels in the Northeast, Atlantic, the Southeast, the Midwest, and California. It also provides installation, maintenance, and repair services for propane and heating oil equipment. The Canadian Propane Distribution segment distributes and sells propane, and propane-consuming equipment; rents tanks, cylinders, and other equipment; and provides equipment supply, installation, and repair services. This segment offers its service in Canada and the United States. Superior General Partner Inc. serves as the general partner of the company. As of February 10, 2022, the company served approximately 780,000 customers The company was founded in 1996 and is headquartered in Toronto, Canada.

Suburban Propane Partners, L.P., through its subsidiaries, engages in the retail marketing and distribution of propane, fuel oil, and refined fuels. The company operates in four segments: Propane, Fuel Oil and Refined Fuels, Natural Gas and Electricity, and All Other. The Propane segment is involved in the retail distribution of propane to residential, commercial, industrial, and agricultural customers, as well as in the wholesale distribution to industrial end users. It offers propane primarily for space heating, water heating, cooking, and clothes drying in the residential and commercial markets; for use as a motor fuel in internal combustion engines to power over-the-road vehicles, forklifts, and stationary engines, as well as to fire furnaces, as a cutting gas to the industrial customers, and in other process applications; and for tobacco curing, crop drying, poultry brooding, and weed control in the agricultural markets. The Fuel Oil and Refined Fuels segment engages in the retail distribution of fuel oil, diesel, kerosene, and gasoline to residential and commercial customers for use primarily as a source of heat in homes and buildings. The Natural Gas and Electricity segment markets natural gas and electricity to residential and commercial customers in the deregulated energy markets in New York and Pennsylvania. The All Other segment sells, installs, and services a range of home comfort equipment, including whole-house heating products, air cleaners, humidifiers, and space heaters. As of September 25, 2021, the company served approximately 1.0 million residential, commercial, industrial, and agricultural customers through 700 locations in 41 states primarily in the east and west coast regions of the United States, as well as portions of the Midwest region of the United States and Alaska. Suburban Energy Services Group LLC serves as a general partner of Suburban Propane Partners, L.P. The company was founded in 1945 and is headquartered in Whippany, New Jersey.

OPAL Fuels Inc. engages in the production and distribution of renewable natural gas for use as a vehicle fuel for heavy and medium-duty trucking fleets. It also designs, develops, constructs, operates, and services fueling stations for trucking fleets that use natural gas to displace diesel as transportation fuel. In addition, it offers design, development, and construction services for hydrogen fueling stations. Further, the company generates and sells renewable power to utilities. As of May 1, 2022, it owned and operated 24 biogas projects. The company was founded in 1998 and is based in White Plains, New York.