TC Energy Corporation (formerly TransCanada Corporation) is a Canadian energy company headquartered in Calgary, Alberta and serving North America. The company's focus is fossil fuel pipelines, and it builds and operates energy infrastructure across Canada, the United States, and Mexico, with core business segments in Natural Gas Pipelines, Power Generation and Energy Storage.
TC Energy's natural gas pipeline network spans approximately , transporting over 30% of the natural gas consumed across North America. The company also holds ownership interests in seven power generation facilities with a combined capacity of 4,650 megawatts (MW), including nuclear and natural gas-fired assets.
In addition to its pipeline and power operations, TC Energy maintains strategic investments in energy infrastructure that support liquefied natural gas (LNG) exports to global markets.
The company was founded in 1951 in Calgary. The company's US headquarters is located in the TC Energy Center skyscraper in Houston, Texas.
TC Energy is the largest shareholder in, and owns the general partner of, TC PipeLines.
History
The company was incorporated in 1951 by a Special Act of Parliament as Trans-Canada Pipe Lines Limited. In 1954 N. Eldon Tanner, president of Merrill Petroleums and former Alberta legislator, became president of the company. The purpose of the company was to develop the TransCanada pipeline (now known as the Canadian Mainline) to supply eastern Canadian markets with natural gas produced in the west.
In 1998, TransCanada Pipelines merged with NOVA Corporation's pipeline business, keeping the TransCanada name and becoming "the fourth largest energy services company in North America".
Seeking to expand its presence in the United States, in 2016, TransCanada acquired Columbia Pipeline Group (CPG) for US$13 billion from NiSource's Shareholders. The CPG acquisition added a pipeline network in Pennsylvania and surrounding states, where the Marcellus and Utica shale gas formations are located.
In May 2019, the company changed its name from TransCanada Corporation to TC Energy Corporation to better reflect the company's business, which includes pipelines, power generation and energy storage operations in Canada, the United States and Mexico.
In October 2019, the 56-story Bank of America Center skyscraper in Houston, Texas was renamed as TC Energy Center and serves as the company's US headquarters.
On October 1, 2024, TC Energy completed the spinoff of its Liquids Pipelines business creating an independent company, South Bow, focused on crude oil pipelines.
Operations Natural gas pipelines TC Energy's natural gas pipelines business builds, owns and operates a network of natural gas pipelines across North America that connects gas production to interconnects and end use markets. The company transports over 30% of continental daily natural gas demand through approximately 94,000 km (58,409 mi) of pipelines. In addition, the company owns 532 Bcf of natural gas storage facilities, making TC Energy one of the largest natural gas storage providers in North America. This segment is TC Energy's largest segment, generating approximately 87% of the company's EBITDA in 2024. The Natural Gas Pipelines business is split into three operating segments: Canadian Natural Gas Pipelines, U.S. Natural Gas Pipelines, and Mexico Natural Gas Pipelines.
The major pipeline systems include:
NGTL System (24,631 km) A wholly owned subsidiary, NOVA Gas Transmission Ltd., connects gas producers in the Western Canadian Sedimentary Basin with consumers and exports. TC Energy has the largest and most extensive natural gas network in Alberta. Canadian Mainline (14,082 km) This pipeline serves as a long haul delivery system transporting natural gas from the Western Canadian Sedimentary Basin across Canada to Ontario and Québec to deliver gas to downstream Canadian and U.S. markets. The pipeline has evolved accommodate additional supply connections closer to its markets. The mainline is over 60 years old Columbia Gas (18,768 km) This natural gas transportation system serves the Appalachian Basin, which contains the Marcellus and Utica plays, two of the largest natural gas shale plays in North America. The system also interconnects with other pipelines that provide access to the U.S. Northeast and the Gulf of Mexico. ANR Pipeline System (15,075 km) This pipeline system connects supply basins and markets throughout the U.S. Midwest, and south to the Gulf of Mexico. This includes connecting supply in Texas, Oklahoma, the Appalachian Basin and the Gulf of Mexico to markets in Wisconsin, Michigan, Illinois and Ohio. In addition, ANR has bi-directional capability on its Southeast Mainline and delivers gas produced from the Appalachian basin to customers throughout the Gulf Coast Region. Columbia Gulf (5,419 km) — This pipeline system was originally designed as a long haul delivery system transporting supply from the Gulf of Mexico to major demand markets in the U.S. Northeast. The pipeline is now transitioning to a north-to-south flow and expanding to accommodate new supply in the Appalachian Basin and its interconnects with Columbia Gas and other pipelines to deliver gas to various Gulf Coast markets. Mexico Pipeline Network (3,500 km) — This consists of a network of natural gas pipelines in Mexico. Southeast Gateway Pipeline (715 km) — A marine pipeline that will transport natural gas, connecting the supply from Tuxpan, Veracruz, to delivery points in Coatzacoalcos, Veracruz, and in Paraíso, Tabasco. Coastal Gaslink Pipeline Project (670 km) – Coastal Gaslink delivers natural gas from the Dawson Creek area to a facility near Kitimat, where LNG Canada prepares it for export to global markets by converting the gas to a liquefied state—also known as liquefied natural gas (LNG). Energy
TC Energy's Energy division consists of power generation and unregulated natural gas storage assets. The power business consists of approximately 4,650 megawatts (MW) of generation capacity owned or under development. These assets are located primarily in Canada and are powered by natural gas, nuclear, and wind. Western Power These assets include approximately 1,000 MW of power generation capacity through four natural gas-fired cogeneration facilities in Alberta and one in Arizona. Eastern Power These assets include approximately 2,900 MW of power generation capacity in Eastern Canada. Bruce Power This operates the Bruce Nuclear Generating Station in Ontario. Comprising eight nuclear units with a combined capacity of approximately 6,400 MW, it is currently the largest operating nuclear power plant in the world. TC Energy holds a 48.4% interest in the asset. Saddlebrook Solar + Storage project in Aldersyde, Alberta consisting of 81 MW of solar generation with utility-scale energy storage. TC Energy has proposed two pumped storage projects to store and supply clean energy. The Ontario Pumped Storage Project near Meaford, Ontario would provide 1000 MW of clean energy and the proposed Canyon Creek Pumped Storage Project near Hinton, Alberta would provide 75 MW of clean energy.
Ownership As of September 2025, 84% of the share capital of TC Energy is owned by institutional investors. The dominant shareholder is the Royal Bank of Canada, which owns over 12% of the company. The top 10 shareholders hold ~40% of total shares outstanding.
Operational projects Operational natural gas pipelines NameCountryLengthTransCanada's participationDescriptionNGTL SystemCanada 100 Receives, transports and delivers natural gas within Alberta and B.C., and connects with the Canadian Mainline, Foothills system and third-party pipelines.Canadian MainlineCanada 100 Transports natural gas from the Alberta/Saskatchewanborder and the Ontario/U.S. border to serve eastern Canada and interconnects to the U.S.FoothillsCanada 100 Transports natural gas from central Alberta to the U.S. border for export to the U.S. Midwest, PacificNorthwest, California and NevadaTrans Québec & MaritimesCanada50Connects with the Canadian Mainline near the Ontario/Québec border to transport natural gas to the Montréal to Québec City corridor, and interconnects with the Portland pipeline system that serves the northeast U.S.Ventures LPCanada100Transports natural gas to the oil sands region near Fort McMurray, Alberta. It also includes a 27 km (17 mile) pipeline supplying natural gas to a petrochemical complex at Joffre, Alberta.Great Lakes CanadaCanada100 Transports natural gas from the Great Lakes system in the U.S. to Ontario, near Dawn, through a connection at the U.S. border underneath the St. Clair RiverANRUnited States100Transports natural gas from various supply basins to markets throughout the Midwest and Gulf Coast.BisonUnited States 25.7Transports natural gas from the Powder River Basin in Wyoming to Northern Border in North Dakota.Columbia GasUnited States 100 Transports natural gas from supply primarily in the Appalachian Basin to markets throughout the U.S. Northeast.Columbia GulfUnited States100Transports natural gas to various markets and pipeline interconnects in the southern U.S. and Gulf Coast.CrossroadsUnited States 100 Interstate natural gas pipeline operating in Indiana and Ohio with multiple interconnects to other pipelines.Gas Transmission NorthwestUnited States 25.7Transports WCSB and Rockies natural gas to Washington, Oregon and California. Connects with Tuscarora and Foothills.Great LakesUnited States 65.5Connects with the Canadian Mainline near Emerson, Manitoba, and to Great Lakes Canada near St Clair, Ontario, plus interconnects with ANR at Crystal Falls and Farwell in Michigan, to transport natural gas to eastern Canada and the U.S. Upper MidwestIroquoisUnited States 13.4Connects with the Canadian Mainline and serves markets in New York.MillenniumUnited States 47.5Natural gas pipeline supplied by local production, storage fields and interconnecting upstream pipelines to serve markets along its route and to the U.S. Northeast.North BajaUnited States 25.7Transports natural gas between Arizona and California, and connects with a third-party pipeline on the California/ Mexico border. Northern BorderUnited States 12.9Transports WCSB, Bakken and Rockies natural gas from connections with Foothills and Bison to U.S. Midwest markets. PortlandUnited States 15.9Connects with TQM near East Hereford, Québec to deliver natural gas to customers in the U.S. Northeast. TuscaroraUnited States 25.7Transports natural gas from GTN at Malin, Oregon to markets in northeastern California and northwestern Nevada.GuadalajaraMexico 100Transports natural gas from Manzanillo, Colima to Guadalajara, Jalisco.MazatlánMexico 100Transports natural gas from El Oro to Mazatlán, Sinaloa inMexico. Connects to the Topolobampo Pipeline at El OroTamazunchaleMexico 100Transports natural gas from Naranjos, Veracruz in east central Mexico to Tamazunchale, San Luis Potosí and on to El Sauz, Querétaro.TopolobampoMexico 100Transports natural gas to Topolobampo, Sinaloa, from interconnects with third-party pipelines in El Oro, Sinaloa and El Encino, Chihuahua in Mexico
Operational power projects Name Fuel Type Net Installed Capacity (MW) TransCanada's participation DescriptionBear CreekNatural Gas100 100Cogeneration plant in Grande Prairie, Alberta. CarselandNatural Gas95 100 Cogeneration plant in Carseland, Alberta.Mackay RiverNatural Gas205100Cogeneration plant in Fort McMurray, Alberta. RedwaterNatural Gas46100Cogeneration plant in Redwater, Alberta. BécancourNatural Gas550100Cogeneration plant in Trois-Rivières, Québec. GrandviewNatural Gas90 100 Cogeneration plant in Saint John, New Brunswick. BruceNuclear309948.4As part of Bruce Power Limited Partnership. Eight operating reactors in Tiverton, Ontario. Bruce Power leases the eight nuclear facilities from OPG.
Political activities