TRANSALTA CORP
TransAlta Corporation (formerly Calgary Power Company, Ltd.) is an electricity power generator and wholesale marketing company headquartered in Calgary, Alberta, Canada. It is a privately owned corporation and its shares are traded publicly. It operates 76 power plants in Canada, the United States, and Australia. TransAlta operates wind, hydro, natural gas, and coal power generation facilities. The company has been recognized for its leadership in sustainability by the Dow Jones Sustainability North America Index, the FTSE4Good Index, and the Jantzi Social Index. TransAlta is Canada's largest investor-owned renewable energy provider.
Basic company information
Each field links to its source. Financial figures retain their reporting periods; background references are identified in the source list.
- Business sectors
- electricity generation [1]
- Company / filing name
- TRANSALTA CORP [2]
- Headquarters location
- Calgary [1]
- Founded
- 1909; 1911 [1]
- Legal form
- business corporation [1]
- Official website
- www.transalta.com ↗ [1]
- ISIN (reported securities)
- CA89346D1078 [1]
- CIK
- 1144800 [2]
- Country in background record
- Canada [1]
- Symbols / exchanges
- TAC (NYSE), TACPF (OTC), TRNTF (OTC), TSLTF (OTC) [2]
Company positioning and business
TransAlta Corporation (formerly Calgary Power Company, Ltd.) is an electricity power generator and wholesale marketing company headquartered in Calgary, Alberta, Canada. It is a privately owned corporation and its shares are traded publicly. It operates 76 power plants in Canada, the United States, and Australia. TransAlta operates wind, hydro, natural gas, and coal power generation facilities. The company has been recognized for its leadership in sustainability by the Dow Jones Sustainability North America Index, the FTSE4Good Index, and the Jantzi Social Index. TransAlta is Canada's largest investor-owned renewable energy provider. [3]
TransAlta operated Canada's largest surface strip coal mine from 1970 until 2021 through its subsidiary company Sunhills Mining. The 12,600-hectare mine produced 13 million tonnes of thermal grade coal a year. The company announced that it would decommission the Highvale mine by 2021. [3]
On November 2, 2023, it was announced that TransAlta bought Heartland Generation (the third largest electricity generation company in Alberta at the time) for $658 million. The purchase means that TransAlta now controls 46% of the electricity generation market in Alberta - a development that has been criticized by numerous academics and industry officials as "a catastrophe" and likely to lead to economic withholding. [3]
Background text: Wikipedia contributors, TransAlta. Selected introductory paragraphs, licensed under CC BY-SA 4.0. Official filing data is cited separately.
Financial year, securities and disclosures
Listed securities: TAC (NYSE), TACPF (OTC), TRNTF (OTC), TSLTF (OTC). Multiple symbols may represent different share classes or securities of the same registrant. [2]
Financial results and regulatory disclosures
No individual financial documents have been indexed yet. Open the source to consult company disclosures. [2]
Related entities and concepts
Frequently asked questions
When was TRANSALTA CORP founded?
Founded: 1909; 1911. The linked source provides the background record. [1]
Where is the headquarters of TRANSALTA CORP?
Headquarters location: Calgary. The linked source provides the background record. [1]
Which business sectors are recorded for TRANSALTA CORP?
Business sectors: electricity generation. The linked source provides the background record. [1]
Sources and review dates
- Wikidata — company background record (CC0) ↗
- Company identity and profile data ↗
- Wikipedia contributors — TransAlta (CC BY-SA 4.0) ↗
Reviewed 23 October 2026. Financial periods and historical event dates are shown separately. Figures reflect their stated source dates; this page is not a live quote or investment recommendation.