TC Energy Corporation (formerly TransCanada Corporation) is a North American energy company, headquartered in Calgary, Alberta. The company 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.
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.
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:
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.
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.
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.
A former TC Energy executive, in an internal meeting for external relations staff, claimed that the firm had played a central role in excluding pipelines from the scope of provincial legislation in British Columbia, Canada. A TC Energy representative described the claims as exaggerated and untrue.
In 2019 TC Energy aided the drafting of anti-protest legislation in South Dakota. The legislation, which Governor Kristi Noem signed into law in March 2019, created a fund to cover the costs of policing pipeline protests, and was accompanied by another law which sought to raise revenue for the fund by creating civil penalties for advising, directing, or encouraging persons participating in rioting. In response to the law Noem was sued by the Indigenous Environmental Network, Sierra Club, and other groups, who argued the laws violate First Amendment rights by incentivizing the state to sue protesters.