TransAlta Corporation operates as non-regulated electricity generation and energy marketing company in Canada, the United States, and Western Australia. The company operates through eight segments: Canadian Coal, U.S. Coal, Canadian Gas, Australian Gas, Wind and Solar, Hydro, Energy Marketing, and Corporate. It generates and markets electricity through various generation facilities. The company has an aggregate net ownership interest of approximately 8,716 megawatts of generating capacity. TransAlta Corporation was founded in 1909 and is headquartered in Calgary, Canada.