Sempra operates as an energy-services holding company in the United States and internationally. The company's San Diego Gas & Electric Company segment provides electric services; and supplies natural gas. It offers electric services to approximately 3.6 million population and natural gas services to approximately 3.3 million population that covers 4,100 square miles. Its Southern California Gas Company segment owns and operates a natural gas distribution, transmission, and storage system that supplies natural gas to a population of approximately 22 million covering an area of 24,000 square miles. The company's Sempra Texas Utilities segment engages in the regulated transmission and distribution of electricity serving 3.8 million homes and businesses, and operation of 140,000 miles of transmission and distribution lines. Its transmission system includes 18,249 circuit miles of transmission lines, a total of 1,174 transmission and distribution substations, and interconnection to 130 third-party generation facilities totaling 45,403 megawatts. The company was formerly known as Sempra Energy and changed its name to Sempra in July 2021. Sempra was founded in 1998 and is headquartered in San Diego, California.

ENGIE SA engages in the power, natural gas, and energy services businesses. It operates through Renewables, Networks, Energy Solutions, Thermal, Supply, Nuclear, and Others segments. The Renewables segment comprises renewable energy generation activities, including financing, construction, operation, and maintenance of renewable energy facilities using various energy sources, such as hydroelectric, onshore wind, photovoltaic solar, biomass, offshore wind, and geothermal. The Networks segment comprises the electricity and gas infrastructure activities and projects, including the management and development of gas and electricity transportation networks and natural gas distribution networks in and outside of Europe, natural gas underground storage in Europe, and regasification infrastructure in France and Chile. The Energy Solutions encompasses the construction and management of decentralized energy networks to produce low-carbon energy and related services. The Thermal segment encompasses power generation activities using thermal assets; operation of power plants fueled mainly by gas or coal, as well as pump -operated storage plants; and financing, construction, and operation of desalination plants, as well as the development of hydrogen production. The Supply segment engages in the sale of gas and electricity to professional, individual, and residential clients. The Nuclear segment engages in the nuclear power generation activities. The company was formerly known as GDF SUEZ S.A. and changed its name to ENGIE SA in April 2015. The company was founded in 1880 and is headquartered in Courbevoie, France.

Brookfield Infrastructure Partners L.P. owns and operates utilities, transport, midstream, and data businesses in North and South America, Europe, and the Asia Pacific. The company's Utilities segment operates approximately 61,000 kilometers (km) of operational electricity transmission and distribution lines; 5,300 km of electricity transmission lines; 4,200 km of natural gas pipelines; 7.3 million electricity and natural gas connections; and 360,000 long-term contracted sub-metering services. This segment also offers heating and cooling solutions; gas distribution; water heaters; and heating, ventilation, and air conditioner rental, as well as other home services. Its Transport segment offers transportation, storage, and handling services for merchandise goods, commodities, and passengers through a network of approximately 22,000 km of track; 5,500 km of track network; 4,800 km of rail; 3,800 km of motorways; and 13 port terminals. The company's Midstream segment offers natural gas transmission, gathering and processing, and storage services through approximately 15,000 km of natural gas transmission pipelines; 600 billion cubic feet of natural gas storage; 17 natural gas processing plants; and 3,900 km of gas gathering pipelines, as well as one petrochemical processing complex. Its Data segment operates approximately 148,000 operational telecom towers; 8,000 multi-purpose towers and active rooftop sites; 10,000 km of fiber backbone; 1,600 cell sites and approximately 12,000 km of fiber optic cable; and 2,100 active telecom towers and 70 distributed antenna systems, as well as 50 data centers and 200 megawatts of critical load capacity. The company was founded in 2007 and is based in Hamilton, Bermuda. Brookfield Infrastructure Partners L.P. is a subsidiary of Brookfield Asset Management Inc.

Brookfield Infrastructure Partners L.P. owns and operates utilities, transport, midstream, and data businesses in North and South America, Europe, and the Asia Pacific. The company's Utilities segment operates approximately 61,000 kilometers (km) of operational electricity transmission and distribution lines; 5,300 km of electricity transmission lines; 4,200 km of natural gas pipelines; 7.3 million electricity and natural gas connections; and 360,000 long-term contracted sub-metering services. This segment also offers heating and cooling solutions; gas distribution; water heaters; and heating, ventilation, and air conditioner rental, as well as other home services. Its Transport segment offers transportation, storage, and handling services for merchandise goods, commodities, and passengers through a network of approximately 22,000 km of track; 5,500 km of track network; 4,800 km of rail; 3,800 km of motorways; and 13 port terminals. The company's Midstream segment offers natural gas transmission, gathering and processing, and storage services through approximately 15,000 km of natural gas transmission pipelines; 600 billion cubic feet of natural gas storage; 17 natural gas processing plants; and 3,900 km of gas gathering pipelines, as well as one petrochemical processing complex. Its Data segment operates approximately 148,000 operational telecom towers; 8,000 multi-purpose towers and active rooftop sites; 10,000 km of fiber backbone; 1,600 cell sites and approximately 12,000 km of fiber optic cable; and 2,100 active telecom towers and 70 distributed antenna systems, as well as 50 data centers and 200 megawatts of critical load capacity. The company was founded in 2007 and is based in Hamilton, Bermuda. Brookfield Infrastructure Partners L.P. is a subsidiary of Brookfield Asset Management Inc.

EDP - Energias de Portugal, S.A. engages in the production, transmission, distribution, and commercialization of electricity in Portugal, Spain, France, Poland, Romania, Italy, Belgium, the United Kingdom, Greece, Brazil, North America, and internationally. The company operates through Renewables, Networks, and Client Solutions & Energy Management segments. It primarily generates electricity through hydro, CCGT, coal, wind, solar, nuclear, and cogeneration sources. The company is also involved in the commercialization of natural gas. It has an installed capacity of 25 GW; and serves 8.7 million electricity customers and 0.7 million gas customers. The company also operates 378,155 kilometers of distribution network lines. In addition, it offers engineering, laboratory tests, professional training, and energy services, as well as manages real estate assets. EDP - Energias de Portugal, S.A. was incorporated in 1976 and is headquartered in Lisbon, Portugal.

The AES Corporation operates as a diversified power generation and utility company. It owns and/or operates power plants to generate and sell power to customers, such as utilities, industrial users, and other intermediaries. The company also owns and/or operates utilities to generate or purchase, distribute, transmit, and sell electricity to end-user customers in the residential, commercial, industrial, and governmental sectors; and generates and sells electricity on the wholesale market. It uses a range of fuels and technologies to generate electricity, including coal, gas, hydro, wind, solar, and biomass; and renewables, such as energy storage and landfill gas. The company owns and/or operates a generation portfolio of approximately 31,459 megawatts. It has operations in the United States, Puerto Rico, El Salvador, Chile, Colombia, Argentina, Brazil, Mexico, Central America, the Caribbean, Europe, and Asia. The company was formerly known as Applied Energy Services, Inc. and changed its name to The AES Corporation in April 2000. The AES Corporation was incorporated in 1981 and is headquartered in Arlington, Virginia.

Canadian Utilities Limited and its subsidiaries engage in the electricity, natural gas, and retail energy businesses worldwide. It operates through Utilities, Energy Infrastructure, and Corporate & Other segments. The Utilities segment provides regulated electricity transmission and distribution services in northern and central east Alberta, the Yukon, and the Northwest Territories; and integrated natural gas transmission and distribution services in Alberta, the Lloydminster area of Saskatchewan, and Western Australia. It owns and operates approximately 9,000 kilometers of natural gas pipelines, 16 compressor sites, approximately 3,700 receipt and delivery points, and a salt cavern storage peaking facility located near Fort Saskatchewan, Alberta in Canada. The Energy Infrastructure segment provides electricity generation, natural gas storage, industrial water, and related infrastructure development solutions in Alberta, the Yukon, the Northwest Territories, Australia, Mexico, and Chile. The Corporate & Other segment retails electricity and natural gas business in Alberta. The company was incorporated in 1927 and is headquartered in Calgary, Canada. Canadian Utilities Limited is a subsidiary of ATCO Ltd.

ATCO Ltd., together with its subsidiaries, provides housing, logistics and transportation, agriculture, water, real estate, and energy and energy infrastructure solutions in Canada, Australia, and internationally. The company offers workforce and residential housing; modular facilities; construction and site support; workforce lodging; facility operations and maintenance; defense operations; and disaster and emergency management services. It also provides commercial real estate services, including sale of commercial and industrial properties; and bulk cargo and port operation services, as well as operates container port facilities. The company's portfolio includes 14 commercial real estate properties, including 417,000 square feet of office property, 60,000 square feet of industrial property, and 315 acres of land. In addition, it engages in electricity generation, distribution, transmission, and related infrastructure services; natural gas distribution; owns and operates natural gas transmission pipelines in Alberta, Saskatchewan, and northern regions of Canada, as well as in Western Australia; and builds, owns, and operates non-regulated industrial water, natural gas storage, natural gas liquids storage, and natural gas related infrastructure to serve the midstream and petrochemical sectors. Further, it sells electricity and natural gas to residential and commercial customers; and provides natural gas appliance demonstrations and small cooking schools for homemakers. ATCO Ltd. was founded in 1947 and is headquartered in Calgary, Canada. ATCO Ltd. operates as a subsidiary of Sentgraf Enterprises Ltd.

Companhia Paranaense de Energia - COPEL engages in the generation, transformation, distribution, and trading of energy to industrial, residential, commercial, rural, and other customers primarily in the State of Paraná, Brazil. The company operates through Power generation and transmission, Power distribution, Gas, and Power sale segments. It is also involved in the piped natural gas distribution. As of December 31, 2021, the company operated 20 hydroelectric plants, 30 wind plants, and 1 thermoelectric plant with a total installed capacity of 5,957 megawatts; and owned and operated 3,638 km of transmission lines and 204,957 km of distribution lines. It holds concessions to distribute electricity in 394 municipalities in the State of Paraná and in the municipality of Porto União in the State of Santa Catarina. Companhia Paranaense de Energia – COPEL was founded in 1954 and is headquartered in Curitiba, Brazil.

Black Hills Corporation, through its subsidiaries, operates as an electric and natural gas utility company in the United States. It operates in two segments, Electric Utilities and Gas Utilities. The Electric Utilities segment generates, transmits, and distributes electricity to approximately 218,000 electric utility customers in Colorado, Montana, South Dakota, and Wyoming; and owns and operates 1,481.5 megawatts of generation capacity and 8,892 miles of electric transmission and distribution lines. The Gas Utilities segment distributes natural gas to approximately 1,094,000 natural gas utility customers in Arkansas, Colorado, Iowa, Kansas, Nebraska, and Wyoming; owns and operates 4,732 miles of intrastate gas transmission pipelines; 41,644 miles of gas distribution mains and service lines; six natural gas storage sites; and approximately 50,000 horsepower of compression and 515 miles of gathering lines. The company also constructs and maintains gas infrastructure facilities for gas transportation customers; and provides appliance repair services to residential utility customers, as well as electrical system construction services to large industrial customers. In addition, it produces electric power through wind, natural gas, and coal-fired generating plants; and coal at its coal mine located near Gillette, Wyoming. The company was incorporated in 1941 and is headquartered in Rapid City, South Dakota.

ALLETE, Inc. operates as an energy company. The company operates through Regulated Operations, ALLETE Clean Energy, and Corporate and Other segments. It generates electricity from coal-fired, biomass co-fired / natural gas, hydroelectric, wind, and solar. The company provides regulated utility electric services in northwestern Wisconsin to approximately 15,000 electric customers, 13,000 natural gas customers, and 10,000 water customers, as well as regulated utility electric services in northeastern Minnesota to approximately 145,000 retail customers and 15 non-affiliated municipal customers. It also owns and maintains electric transmission assets in Wisconsin, Michigan, Minnesota, and Illinois. In addition, the company focuses on developing, acquiring, and operating clean and renewable energy projects; and owns and operates approximately 1,000 megawatts of wind energy generation facility. Further, it is involved in the coal mining operations in North Dakota; and real estate investment activities in Florida. The company owns and operates 158 substations with a total capacity of 10,066 megavolt amperes. It serves taconite mining, paper, pulp and secondary wood products, pipeline, and other industries. The company was formerly known as Minnesota Power, Inc. and changed its name to ALLETE, Inc. in May 2001. ALLETE, Inc. was incorporated in 1906 and is headquartered in Duluth, Minnesota.

Companhia Energética de Minas Gerais, through its subsidiaries, engages in the generation, transmission, distribution, and sale of energy in Brazil. As of December 31, 2021, the company operated 70 hydroelectric, wind, and solar plants with an installed capacity of 5,700 MW; 339,086 miles of distribution lines; and 4,449 miles of transmission lines. It is also involved in the acquisition, transportation, and distribution of gas and its sub products and derivatives; provision of cloud solution, IT infrastructure, IT management, and cybersecurity services; provision of technology systems and systems for operational management of public service concessions; sale and trading of energy; provision of telecommunications services; and distributed generation, account services, cogeneration, energy efficiency, and supply and storage management activities. The company was incorporated in 1952 and is headquartered in Belo Horizonte, Brazil.

NorthWestern Corporation, doing business as NorthWestern Energy, provides electricity and natural gas to residential, commercial, and various industrial customers. The company operates through Electric and Natural Gas segments. It generates, purchases, transmits, and distributes electricity; and produces, purchases, stores, transmits, and distributes natural gas, as well as owns municipal franchises to provide natural gas service in the communities. The company operates 6,819 miles of electric transmission and 18,177 miles of electric distribution lines with approximately 400 transmission and distribution substations; and 2,166 miles of natural gas transmission and 4,945 miles of natural gas distribution lines with approximately 138 city gate stations in Montana. It also operates 1,308 miles of electric transmission and 2,320 miles of electric distribution lines in South Dakota; and 55 miles of natural gas transmission and 2,517 miles of natural gas distribution lines in South Dakota and Nebraska. The company serves approximately 753,600 customers in Montana, South Dakota, Nebraska, and Yellowstone National Park. NorthWestern Corporation was incorporated in 1923 and is based in Sioux Falls, South Dakota.

Otter Tail Corporation, together with its subsidiaries, engages in electric utility, manufacturing, and plastic pipe businesses in the United States. The company's Electric segment produces, transmits, distributes, and sells electric energy in Minnesota, North Dakota, and South Dakota; and operates as a participant in the Midcontinent Independent System Operator, Inc. markets. This segment generates electricity through coal, wind and hydro, and natural gas. It serves approximately 133,000 residential, industrial, and other commercial customers. Its Manufacturing segment engages in the contract machining, metal parts stamping, fabrication and painting, and production of plastic thermoformed horticultural containers, life science and industrial packaging, and material handling components, and extruded raw material stock for recreational vehicle, agricultural, construction, lawn and garden, and industrial and energy equipment industries. It also manufactures clamshell packing, blister packs, returnable pallets, and handling trays for shipping and storing odd-shaped or difficult-to-handle parts for customers in the horticulture, medical and life sciences, industrial, recreation, and electronics industries. The company's Plastics segment manufactures polyvinyl chloride pipes for municipal water, rural water, wastewater, storm drainage and water reclamation system, and other uses. This segment markets its products to wholesalers and distributors through independent sales representatives, company salespersons, and customer service representatives. The company was formerly known as Otter Tail Power Company and changed its name to Otter Tail Corporation in 2001. Otter Tail Corporation was founded in 1907 and is headquartered in Fergus Falls, Minnesota.

Avista Corporation, together with its subsidiaries, operates as an electric and natural gas utility company. It operates in two segments, Avista Utilities and AEL&P. The Avista Utilities segment provides electric distribution and transmission, and natural gas distribution services in parts of eastern Washington and northern Idaho; and natural gas distribution services in parts of northeastern and southwestern Oregon, as well as generates electricity in Washington, Idaho, Oregon, and Montana. This segment also engages in the wholesale purchase and sale of electricity and natural gas. The AEL&P segment offers electric services to 17,400 customers in the city and borough of Juneau, Alaska. The company generates electricity through hydroelectric, thermal, and wind facilities. As of February 23, 2022, it provided electric service to 406,000 customers and natural gas to 372,000 customers. In addition, the company engages in venture fund investments, real estate investments, and other investments. Avista Corporation was incorporated in 1889 and is headquartered in Spokane, Washington.

Hawaiian Electric Industries, Inc., together with its subsidiaries, engages in the electric utility, banking, and renewable/sustainable infrastructure investment businesses in the state of Hawaii. It operates in three segments: Electric Utility, Bank, and Other. The Electric Utility segment engages in the production, purchase, transmission, distribution, and sale of electricity in the islands of Oahu, Hawaii, Maui, Lanai, and Molokai. Its renewable energy sources and potential sources include wind, solar, photovoltaic, geothermal, wave, hydroelectric, municipal waste, and other biofuels. This segment serves suburban communities, resorts, the United States armed forces installations, and agricultural operations. The Bank segment operates a community bank that offers banking and other financial services to consumers and businesses, including savings and checking accounts; and loans comprising residential and commercial real estate, residential mortgage, construction and development, multifamily residential and commercial real estate, consumer, and commercial loans. This segment operates 42 branches, including 29 branches in Oahu, 6 branches in Maui, 4 branches in Hawaii, 2 branches in Kauai, and 1 branch in Molokai. The Other segment invests in non-regulated renewable energy and sustainable infrastructure in the State of Hawaii. Hawaiian Electric Industries Inc. was incorporated in 1891 and is headquartered in Honolulu, Hawaii.

REN - Redes Energéticas Nacionais, SGPS, S.A., through its subsidiaries, engages in the transmission of electricity and natural gas in Portugal. It operates in two segments, Electricity and Gas; and Telecommunications. The company operates as a national electricity transmission network; purchases, sells, imports, and exports electricity and natural gas; manages a concession to operate a pilot area for the production of electric energy from ocean waves; and operates a telecommunications network. It also operates liquefied natural gas terminal maintenance and regasification facilities; manages projects and ventures in the natural gas sector; provides underground storage development, maintenance, and operation services; offers natural gas transport and management services; and distributes natural gas, as well as provides communication and sustainability, marketing, business management, business development and consulting, and IT project services. In addition, the company invests in assets, shares, companies, and associations; transmits and transforms electricity in Chile, as well as participates, finances, collaborates, and conducts management of companies; and manages back offices. As of December 31, 2021, it operated national electricity transmission system with 8,907 kilometers in lines, 70 transformer substations, and 17 switching and transition stations; and national natural gas transmission network with 1,375 kilometers of high-pressure gas pipelines, 66 junction stations for pipeline branching, 45 block valve stations, 5 T-branch interconnection stations, 85 gas pressure regulating and metering stations, and 2 custody transfer stations. The company was founded in 1994 and is headquartered in Lisbon, Portugal.

Montauk Renewables, Inc., a renewable energy company, engages in recovery and processing of biogas from landfills and other non-fossil fuel sources. It operates in two segments, Renewable Natural Gas and Renewable Electricity Generation. The company develops, owns, and operates renewable natural gas (RNG) projects that capture methane and prevents it from being released into the atmosphere by converting it into either RNG or electrical power for the electrical grid. Its customers for RNG and renewable identification numbers (RIN) include long-term owner-operators of landfills and livestock farms, local utilities, and refiners in the natural gas and refining sectors. The company was founded in 1980 and is headquartered in Pittsburgh, Pennsylvania.