TransAlta Corporation develops, produces, and sells electric energy. It operates through Hydro, Wind and Solar, Gas, Energy Transition, and Energy Marketing segments. The Hydro segment has an interest of approximately 922 MW in Alberta and Canada. The Wind and Solar segment has a net ownership interest of approximately 2,587 MW in Alberta, Canada, the United States, and Western Australia, as well as battery storage facilities. The Gas segment has a net ownership interest of approximately 4,834 MW in Alberta, Canada, the United States, and Western Australia. The Energy Transition segment has a net ownership interest of approximately 671 MW in the United States and operates the Skookumchuck hydro facility in Centralia. The Energy Marketing segment trades electricity, natural gas, and environmental products. TransAlta Corporation was founded in 1909 and is headquartered in Calgary, Canada.