Otter Tail Corporation, together with its subsidiaries, engages in electric, manufacturing, and plastics 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 and oil sources. As of December 31, 2019, it served approximately 132,578 residential, commercial, industrial, and other customers. Its Manufacturing segment stamps, fabricates, welds, paints, and laser cuts metal components for use in the recreational vehicle, agricultural, oil and gas, lawn and garden, industrial equipment, health and fitness, and enclosure industries; manufactures and fabricates parts for off-road equipment, mining machinery, oil fields and offshore oil rigs, wind industry components, broadcast antennae, and farm equipment; and provides laser cutting services and stamping to weldments and assemblies for metal fabrication buyers and original equipment manufacturers. It also manufactures and sells thermoformed products for the horticulture industry; and clamshell packing, blister packs, returnable pallets, and handling trays for shipping and storing odd-shaped or difficult-to-handle parts for customers in the 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 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.
Otter Tail Corp.
Black Hills Corporation, through its subsidiaries, operates as an electric and natural gas utility company in the United States. It operates through Electric Utilities, Gas Utilities, Power Generation, and Mining segments. The Electric Utilities segment generates, transmits, and distributes electricity to approximately 214,000 electric customers in Colorado, Montana, South Dakota, and Wyoming, as well as provides electrical system construction services to large industrial customers. This segment owns 939 megawatts of generation capacity and 8,900 miles of electric transmission and distribution lines. The Gas Utilities segment distributes natural gas to approximately 1,066,000 natural gas utility customers in Arkansas, Colorado, Iowa, Kansas, Nebraska, and Wyoming. It also provides appliance repair services to residential customers through company technicians and third-party service providers; and constructs and maintains gas infrastructure facilities for gas transportation customers. This segment owns and operates approximately 4,775 miles of intrastate gas transmission pipelines; 41,210 miles of gas distribution mains and service lines; 7 natural gas storage sites; and approximately 49,000 horsepower of compression and 500 miles of gathering lines. The Power Generation segment produces electric power through wind, natural gas, and coal generating plants; and sells the electric capacity and energy primarily to utilities under long-term contracts. The Mining segment produces coal at its coal mine located near Gillette, Wyoming; and sells the coal to electric generation facilities. Black Hills Corporation was founded in 1941 and is headquartered in Rapid City, South Dakota.
Black Hills Corp.
NorthWestern Corporation, doing business as NorthWestern Energy, provides electricity and natural gas to residential, commercial, and industrial customers. The company operates through Electric Operations and Natural Gas Operations segments. It generates, 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's natural gas transmission system covers approximately 4,810 miles of pipeline. It serves approximately 734,800 customers in Montana, South Dakota, and Nebraska, the United States. NorthWestern Corporation was founded in 1923 and is based in Sioux Falls, South Dakota.
DTE Energy Company engages in the utility operations. The company's Electric segment generates, purchases, distributes, and sells electricity to approximately 2.2 million residential, commercial, and industrial customers in southeastern Michigan. It generates electricity through fossil-fuel, hydroelectric pumped storage, and nuclear plants, as well as wind and other renewable assets. This segment owns and operates approximately 700 distribution substations and 445,200 line transformers. The company's Gas segment purchases, stores, transports, distributes, and sells natural gas to approximately 1.3 million residential, commercial, and industrial customers throughout Michigan; and sells storage and transportation capacity. This segment has approximately 20,000 miles of distribution mains; 1,305,000 service pipelines; and 1,285,000 active meters, as well as owns approximately 2,000 miles of transmission pipelines. Its Gas Storage and Pipelines segment owns natural gas storage fields, lateral and gathering pipeline systems, and compression and surface facilities, as well as has ownership interests in interstate pipelines serving the Gulf Coast, Midwest, Ontario, and northeast markets. The company's Power and Industrial Projects segment offers metallurgical coke; pulverized coal and petroleum coke to the steel, pulp and paper, and other industries; and power, steam and chilled water production, and wastewater treatment services, as well as supplies compressed air to industrial customers. It also owns and operates 5 renewable generating plants with a capacity of 217 MWs; 23 gas recovery sites; and 10 reduced emissions fuel facilities. Its Energy Trading segment engages in power, natural gas, and environmental marketing and trading; structured transactions; and the optimization of contracted natural gas pipeline transportation and storage positions. The company was founded in 1903 and is headquartered in Detroit, Michigan.
DTE Energy Co.
Dominion Energy, Inc. produces and transports energy. The company's Dominion Energy Virginia segment engages in the regulated electric generation, transmission, and distribution operations that serve residential, commercial, industrial, and governmental customers in Virginia and North Carolina. Its Gas Transmission & Storage segment operates interstate natural gas transmission pipelines and underground storage systems, as well as engages in nonregulated retail natural gas marketing, and development of renewable natural gas and LNG infrastructure. The company's Gas Distribution segment engages in the regulated natural gas gathering, transportation, distribution, and sales activities. This segment serves residential, commercial, and industrial customers. Its Dominion Energy South Carolina segment generates, transmits, and distributes electricity and natural gas to residential, commercial, and industrial customers in South Carolina. The company's Contracted Generation segment is involved in the energy marketing and price risk activities. As of December 31, 2019, the company's portfolio of assets included approximately 30,700 megawatts of electric generating capacity; 10,400 miles of electric transmission lines; 85,000 miles of electric distribution lines; 14,600 miles of natural gas transmission, gathering, and storage pipelines; and 103,400 miles of gas distribution pipelines. It serves approximately 7 million utility and retail energy customers; and operates underground natural gas storage systems with approximately 1 trillion cubic feet of storage capacity. The company sells electricity at wholesale prices to rural electric cooperatives and municipalities, as well as into wholesale electricity markets. The company was formerly known as Dominion Resources, Inc. and changed its name to Dominion Energy, Inc. in May 2017. Dominion Energy, Inc. was incorporated in 1983 and is headquartered in Richmond, Virginia.
Dominion Energy, Inc.
CenterPoint Energy, Inc. operates as a public utility holding company in the United States. The company's Houston Electric T&D segment electric transmission and distribution services to electric utility. It owns 236 substation sites with a total installed rated transformer capacity of 68,053 megavolt amperes. Its Indiana Electric Integrated segment provides energy delivery services to electric customers and electric generation assets to electric customers and wholesale markets. The company's Natural Gas Distribution segment sells regulated intrastate natural gas; provides natural gas transportation and storage services for residential, commercial, industrial, and transportation customers; and offers unregulated services comprising home appliance maintenance and repair services. This segment owns approximately 98,000 linear miles of natural gas distribution mains. Its Energy Services segment provides physical natural gas supplies primarily to commercial and industrial customers, and electric and natural gas utilities; natural gas management services; and physical delivery services, as well as procures and optimizes transportation and storage assets. It owns and operates 210 miles of intrastate pipeline in Louisiana and Texas; and leases transportation capacity on various interstate and intrastate pipelines, and storage. The company's Infrastructure Services segment offers underground pipeline construction and repair services. Its Midstream Investment segment offers natural gas and crude oil gathering, and natural gas processing services to its producer customers; and interstate and intrastate natural gas pipeline transportation and storage services to its producer, power plant, local distribution company, and industrial end-user customers. As of March 2, 2020, it served approximately 7 million electric and natural gas metered customers. CenterPoint Energy, Inc. was founded in 1866 and is headquartered in Houston, Texas.
CenterPoint Energy, Inc.
BWX Technologies, Inc. manufactures and sells nuclear components in the United States, Canada, and internationally. Its Nuclear Operations Group segment offers nuclear components, reactors, assemblies, and fuel for the United States Department of Energy/National Nuclear Security Administration's Naval Nuclear Propulsion Program and other uses; close-tolerance equipment for nuclear applications; research reactor fuel elements for colleges, universities, and national laboratories; and components for defense applications. It also provides missile launch tubes for the United States Navy submarines; converts high-enriched uranium into low-enriched fuel for use in commercial reactors to generate electricity; and receives, stores, characterizes, dissolves, recovers, and purifies uranium-bearing materials. Its Nuclear Services Group segment provides nuclear materials processing, environmental site restoration, and management and operating services for the United States government-owned facilities; develops technology for advanced nuclear power sources application and customized tooling solutions; designs, engineers, licenses, and manufactures reactors; and inspects and services steam generators, heat exchangers, and balance of plants; and provides high pressure water lancing and non-destructive examination services, and nuclear fuel. Its Nuclear Power Group segment offers commercial nuclear steam generators, heat exchangers, pressure vessels, reactor components, and containers; nuclear fuel, fuel handling systems, tooling delivery systems, and related services, as well as engineering and in-plant services for nuclear power plants; and medical radioisotopes and radiopharmaceuticals. It also designs, manufactures, commissions, and services nuclear power generation equipment. The company was formerly known as The Babcock & Wilcox Company and changed its name to BWX Technologies, Inc. in June 2015. The company was founded in 1867 and is headquartered in Lynchburg, Virginia.
BWX Technologies, Inc.
CMS Energy Corporation operates as an energy company primarily in Michigan. The company operates in four segments: Electric Utility, Gas Utility, Enterprises, and EnerBank. The Electric Utility segment is involved in the generation, purchase, transmission, distribution, and sale of electricity. This segment generates electricity through coal, wind, gas, renewable energy, oil, and nuclear sources. Its transmission and distribution system comprises 213 miles of transmission overhead lines; 205 miles of high-voltage distribution overhead lines; 4 miles of high-voltage distribution underground lines; 4,430 miles of high-voltage distribution overhead lines; 19 miles of high-voltage distribution underground lines; 66,917 miles of electric distribution overhead lines; 9,314 miles of underground distribution lines; substations; and a battery facility. The Gas Utility segment engages in the purchase, transmission, storage, distribution, and sale of natural gas, which includes 2,426 miles of transmission lines; 15 gas storage fields; 27,729 miles of distribution mains; and 8 compressor stations. The Enterprises segment is involved in the independent power production and marketing, including the development and operation of renewable generation. It owns interests in independent power plants totaling 1,335 megawatts. The EnterBank segment operates an industrial bank providing unsecured consumer installment loans for financing home improvements. It serves 1.8 million electric and 1.8 million gas customers, including residential, commercial, and diversified industrial customers. CMS Energy Corporation was founded in 1987 and is headquartered in Jackson, Michigan.
CMS Energy Corp.
Entergy Corporation, together with its subsidiaries, engages in the production and distribution of electricity in the United States. The company generates electricity through gas/oil, nuclear, coal, hydro, and solar power sources. It operates in two segments, Utility and Entergy Wholesale Commodities. The company's Utility segment generates, transmits, distributes, and sells electric power in portions of Arkansas, Mississippi, Texas, and Louisiana, including the City of New Orleans; and distributes natural gas. Its Entergy Wholesale Commodities segment engages in the ownership, operation, and decommissioning of nuclear power plants located in the northern United States; sale of electric power to wholesale customers; provision of services to other nuclear power plant owners; and owning interests in non-nuclear power plants that sell electric power to wholesale customers. This segment sells energy to retail power providers, utilities, electric power co-operatives, power trading organizations, and other power generation companies. The company's power plants have approximately 30,000 megawatts (MW) of electric generating capacity, including approximately 9,000 MW of nuclear power. The company delivers electricity to 2.9 million utility customers in Arkansas, Louisiana, Mississippi, and Texas. Entergy Corporation was founded in 1949 and is based in New Orleans, Louisiana.
Hawaiian Electric Industries, Inc., through its subsidiaries, engages in the electric utility and banking businesses primarily in the state of Hawaii. The company's Electric Utility segment is involved in generating, purchasing, transmitting, distributing, and selling electric energy. Its renewable energy sources and potential sources include wind, solar, photovoltaic, geothermal, wave, hydroelectric, municipal waste, and other bio fuels. This segment distributes and sells electricity on the islands of Oahu, Hawaii, Maui, Lanai, and Molokai; and serves suburban communities, resorts, the United States armed forces installations, and agricultural operations. Its Bank segment operates a savings bank that offers banking and other financial services, including deposit products, such as savings accounts 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 to consumers and business. This segment operates 49 branches, including 34 branches in Oahu, 6 branches in Maui, 5 branches in Hawaii, 3 branches in Kauai, and 1 branch in Molokai. The company's Other segment focuses on investing in non-regulated renewable energy and infrastructure in the State of Hawaii. Hawaiian Electric Industries Inc. was founded in 1891 and is headquartered in Honolulu, Hawaii.
Hawaiian Electric Industries, Inc.
PNM Resources, Inc., through its subsidiaries, engages in the energy and energy-related businesses in the United States. It operates through Public Service Company of New Mexico (PNM) and Texas-New Mexico Power Company (TNMP) segments. The PNM segment is primarily involved in the generation, transmission, and distribution of electricity. It generates electricity using coal, natural gas and oil, nuclear fuel, solar, wind, and geothermal energy sources. As of December 31, 2018, this segment had owned or leased facilities with a total net generation capacity of 2,102 megawatts; and owned 3,206 miles of electric transmission lines, 6,067 miles of distribution overhead lines, 5,885 miles of underground distribution lines, and 255 substations. It also owns and leases office and other equipment, office space, vehicles, and real estate. The TNMP segment provides regulated transmission and distribution services. As of December 31, 2018, this segment owned 997 miles of overhead electric transmission lines, 7,151 miles of overhead distribution lines, 1,260 miles of underground distribution lines, and 122 substations. It also owns and leases vehicles, service facilities, and office locations throughout its service territory. The company serves approximately 782,000 residential, commercial, and industrial customers, as well as end-users of electricity in New Mexico and Texas. PNM Resources, Inc. was founded in 1917 and is headquartered in Albuquerque, New Mexico.
PNM Resources, Inc.
NRG Energy, Inc., together with its subsidiaries, operates as an energy company in the United States. It operates through Generation and Retail segments. The company is involved in the producing, selling, and delivering electricity and related products and services to 3.7 million residential, industrial, and commercial consumers. It generates electricity using natural gas, coal, oil, solar, nuclear, and battery storage. The company also provides system power, distributed generation, renewable products, backup generation, storage and distributed solar, demand response, energy efficiency, advisory, and on-site energy solutions; and carbon management and specialty services. In addition, it trades in electric power, natural gas, and related commodity and financial products, including forwards, futures, options, and swaps. Further, the company procures fuels; provides transportation services; and directly sells energy, services, and products and services to retail customers under the NRG, Reliant, Green Mountain Energy, Stream, XOOM Energy, and other names. As of December 31, 2019, it owns fossil fuel, nuclear, and renewable plants with generation capacity of 23,000 megawatts. NRG Energy, Inc. was founded in 1989 and is headquartered in Princeton, New Jersey.
NRG Energy, Inc.
Eversource Energy, a public utility holding company, engages in the energy delivery business. The company operates in four segments: Electric Distribution, Electric Transmission, Natural Gas Distribution, and Water Distribution. It is involved in the transmission and distribution of electricity; and distribution of natural gas. The company operates regulated water utilities. It also provides water services to approximately 229,000 customers. It serves residential, commercial, industrial, and municipal and fire protection customers in Connecticut, Massachusetts, and New Hampshire, the United States. The company was formerly known as Northeast Utilities and changed its name to Eversource Energy in April 2015. Eversource Energy was founded in 1927 and is based in Springfield, Massachusetts.
WEC Energy Group, Inc., through its subsidiaries, provides regulated natural gas and electricity, and nonregulated renewable energy services in the United States. The company operates through six segments: Wisconsin, Illinois, Other States, Electric Transmission, Non-Utility Energy Infrastructure, and Corporate and Other. It generates and distributes electricity from coal, natural gas, oil, hydroelectric, wind, and biomass sources; provides electricity transmission services; offers retail natural gas distribution services; transports natural gas; and generates, distributes, and sells steam. The company offers electricity to approximately 1.6 million residential, small and large commercial and industrial, and other customers; and natural gas to 2.9 million residential, and commercial and industrial customers. As of December 31, 2019, it operated approximately 36,500 miles of overhead distribution lines and 34,100 miles of underground distribution cable, as well as approximately 500 distribution substations and 503,200 line transformers; and approximately 49,500 miles of natural gas distribution mains, as well as 1,200 miles of natural gas transmission mains. The company was formerly known as Wisconsin Energy Corporation and changed its name to WEC Energy Group, Inc. in June 2015. WEC Energy Group, Inc. was incorporated in 1981 and is headquartered in Milwaukee, Wisconsin.
WEC Energy Group, Inc.
TransAlta Corporation operates as non-regulated electricity generation and energy marketing company in Canada, the United States, and Western Australia. It operates through Canadian Coal, U.S. Coal, Canadian Gas, Australian Gas, Wind and Solar, Hydro, and Energy Marketing segments. The company generates and markets electricity through various generation fuels, such as coal, natural gas, water, solar, and wind. It also engages in wholesale trading of electricity and other energy-related commodities and derivatives. The company operates facilities with approximately 8,385 megawatts of aggregate generating capacity. TransAlta Corporation was founded in 1909 and is headquartered in Calgary, Canada.
NextEra Energy, Inc., through its subsidiaries, generates, transmits, and distributes electric power in North America. The company generates electricity through wind, solar, nuclear, coal, oil, and natural gas facilities. It also develops, constructs, and operates long-term contracted assets with a focus on renewable generation facilities, natural gas pipelines, and battery storage projects; and owns, develops, constructs, manages, and operates electric generation facilities in wholesale energy markets. In addition, the company engages in the energy-related commodity marketing and trading activities. The company was formerly known as FPL Group, Inc. and changed its name to NextEra Energy, Inc. in May 2010. NextEra Energy, Inc. was founded in 1925 and is headquartered in Juno Beach, Florida.
NextEra Energy, Inc.
Pampa EnergÃa S.A., an integrated electricity company, engages in the generation, transmission, and distribution of electricity in Argentina. It operates through Electricity Generation, Electricity Distribution, Oil and Gas, Petrochemicals, and Holding and Other Business segments. The company generates electricity through combined cycle gas-fired generating units, thermal generation plants, open-cycle gas turbines, and hydroelectric power generation systems, as well as through a wind farm. As of December 31, 2019, it had an installed electricity generation capacity of approximately 4,751 megawatts; 3.1 million electricity distribution customers in the northern region of the City of Buenos Aires and Northwestern Greater Buenos Aires area; and 20,981 kilometers of high voltage transmission lines. The company is also involved in the exploration and production of oil and gas. In addition, it offers petrochemicals, such as intermediate gasoline products, aromatic solvents, hexane and other hydrogenated paraffinic solvents, and propellants for the cosmetic industry; monomer styrene; and rubber and polymer products from natural gas, virgin naphtha, propane, and other supplies. As of December 31, 2019, the company had combined crude oil and natural gas proved reserves of approximately 135.4 million barrels of oil equivalent; one fully owned refinery with an installed capacity of approximately 25.8 thousand barrels per day; and operated a network of 90 gas stations. The company was formerly known as Pampa Holding S.A. and changed its name to Pampa EnergÃa S.A. in September 2008. Pampa EnergÃa S.A. was founded in 1945 and is based in Buenos Aires, Argentina.
Pampa Energía SA
Ormat Technologies, Inc. engages in the geothermal and recovered energy power business in the United States, Indonesia, Kenya, Turkey, Chile, Guatemala, New Zealand, Honduras, and internationally. The company operates through three segments: Electricity, Product, and Energy Storage and Management Services. The Electricity segment develops, builds, owns, and operates geothermal, solar photovoltaic (PV), and recovered energy-based power plants; and sells electricity. The Product segment designs, manufactures, and sells equipment for geothermal, recovered energy-based electricity generation, and remote power units, such as fossil fuel powered turbo-generators and heavy duty direct-current generators. This segment also provides services relating to the engineering, procurement, construction, operation, and maintenance of geothermal, solar PV, and recovered energy-based power plants. The Product segment serves contractors; developers, owners, and operators of geothermal power plants; and owners and operators of interstate natural gas pipelines, gas processing plants, and cement plants, as well as companies in other energy-intensive industrial processes. The Energy Storage and Management Services segment offers energy storage, demand response, and energy management related services, as well as services relating to the engineering, procurement, construction, operation, and maintenance of energy storage units. Ormat Technologies, Inc. was founded in 1965 and is based in Reno, Nevada.
Ormat Technologies, Inc.
American Electric Power Company, Inc., an electric public utility holding company, engages in the generation, transmission, and distribution of electricity for sale to retail and wholesale customers in the United States. It operates through Vertically Integrated Utilities, Transmission and Distribution Utilities, AEP Transmission Holdco, and Generation & Marketing segments. The company generates electricity using coal and lignite, natural gas, nuclear, and hydroelectric, as well as solar, wind, and other energy sources. It also supplies and markets electric power at wholesale to other electric utility companies, rural electric cooperatives, municipalities, and other market participants. The company owns, leases, or controls approximately 4,004 railcars, 468 barges, 8 towboats, and a coal handling terminal with approximately 18 million tons of annual capacity. American Electric Power Company, Inc. was founded in 1906 and is headquartered in Columbus, Ohio.
American Electric Power Co., Inc.
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 natural gas, coal, pet coke, diesel, and oil, as well as renewables, such as hydro, solar, wind, energy storage, biomass, and landfill gas. The company owns and/or operates a generation portfolio of approximately 30,471 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 founded in 1981 and is headquartered in Arlington, Virginia.
The AES Corp.
Korea Electric Power Corporation, an integrated electric utility company, generates, transmits, and distributes electricity in South Korea and internationally. The company operates through Transmission and Distribution, Electric Power Generation (Nuclear), Electric Power Generation (Non-nuclear), Plant Maintenance & Engineering Service, and Others segments. It generates power from nuclear, coal, oil, liquefied natural gas, internal combustion, combined-cycle, integrated gasification combined cycle, hydro, wind, solar, fuel cell, biogas, and other sources. As of December 31, 2019, the company had a total of 671 generation units, including nuclear, thermal, hydroelectric, and internal combustion units with an installed generation capacity of 83,672 megawatts. Its transmission system consisted of 34,440 circuit kilometers of lines of 765 kilovolts and others, including high-voltage direct current lines, as well as 864 substations with an installed transformer capacity of 326,329 megavolt-amperes; and distribution system included 125,067 megavolt-amperes of transformer capacity and 9,641,891 units of support with a total line length of 504,402 circuit kilometers. The company provides electricity to residential, commercial, educational, industrial, agricultural, street lighting, and overnight power usage. It also offers utility plant maintenance and architectural engineering, information, communication line leasing, resources development, and fly ashes recycling services, as well as sells nuclear fuel. Korea Electric Power Corporation was founded in 1961 and is headquartered in Naju, South Korea.
Korea Electric Power Corp.
OGE Energy Corp., together with its subsidiaries, operates as an energy and energy services provider that offers physical delivery and related services for electricity and natural gas primarily in the south central United States. It operates in two segments, Electric Utility and Natural Gas Midstream Operations. The Electric Utility segment generates, transmits, distributes, and sells electric energy. This segment furnishes retail electric service in 267 communities and their contiguous rural and suburban areas; and owns and operates coal-fired, natural gas-fired, wind-powered, and solar-powered generating assets. Its service area covers 30,000 square miles in Oklahoma and western Arkansas, including Oklahoma City in Oklahoma; and Fort Smith, Arkansas. The Natural Gas Midstream Operations segment engages in gathering, processing, transporting, and storing natural gas; and the provision of crude oil gathering services, and interstate and intrastate natural gas pipeline transportation and storage services primarily to its producer, power plant, local distribution company, and industrial end-user customers. As of December 31, 2019, the company owned and operated interconnected electric generation, transmission, and distribution systems, including 13 generating stations with an aggregate capability of 7,081 megawatts; and transmission systems comprising 53 substations and 5,122 structure miles of lines in Oklahoma, and seven substations and 277 structure miles of lines in Arkansas. Its distribution systems included 350 substations; 29,406 structure miles of overhead lines; 3,050 miles of underground conduit; and 10,967 miles of underground conductors in Oklahoma, as well as 30 substations, 2,786 structure miles of overhead lines, 315 miles of underground conduit, and 679 miles of underground conductors in Arkansas. The company was founded in 1902 and is headquartered in Oklahoma City, Oklahoma.
OGE Energy Corp.
Ameren Corporation, together with its subsidiaries, operates as a public utility holding company in the United States. It operates through four segments: Ameren Missouri, Ameren Illinois Electric Distribution, Ameren Illinois Natural Gas, and Ameren Transmission. The company engages in the rate-regulated electric generation, transmission, and distribution activities; and rate-regulated natural gas distribution and transmission businesses. It primarily generates electricity through coal, nuclear, and natural gas, as well as renewable sources, such as hydroelectric, methane gas, and solar. The company serves residential, commercial, and industrial customers. As of September 28, 2020, it served approximately 2.4 million electric customers and approximately 900,000 natural gas customers. The company was founded in 1881 and is headquartered in St. Louis, Missouri.
Huaneng Power International, Inc., through its subsidiaries, generates and sells electricity and heat to the regional or provincial grid companies in the People's Republic of China, Singapore, and Pakistan. It is involved in the development, investment, construction, operation, and management of power plants and related projects; and generation, wholesale, and retail of power and other relating utilities. The company generates power from coal, wind, solar, gas, oil, biomass, and hydro resources. It is also involved in the sale of coal ash and lime; provision of cargo loading and storage, port, warehousing, and conveying services; photovoltaic power generation projects development and construction; and provision of thermal energy and cold energy services, as well as thermal heating services. In addition, the company engages in the repair of power equipment; provision of water supply and transportation services; construction and operation of electricity distribution networks and heating pipe networks; energy supply, energy transmission, and substation project contracting activities; cargo transportation; and port management, investment, and development activities. Further, it is involved in the management of industrial water and waste, as well as provides environment engineering, and information technology and management consulting services. Additionally, it sells raw and processed coal; and provides central heat, and plumbing and pipe installation services, as well as desalinated water. As of December 31, 2019, the company had controlled generating capacity of 106,924 megawatts and a total generating capacity of 93,676 megawatts. Huaneng Power International, Inc. was founded in 1994 and is headquartered in Beijing, the People's Republic of China.