TransAlta Corporation (TransAlta) is a non-regulated electricity generation and energy marketing company with an aggregate net ownership interest of approximately 8,720 megawatts of generating capacity. The Company is engaged in the production and sale of electric energy. It focuses on generating and marketing electricity in Canada, the United States and Western Australia through its diversified portfolio of facilities fuelled by coal, natural gas, diesel, hydro, wind and solar. TransAlta is organized into eight business segments: Canadian Coal, U.S. Coal, Canadian Gas, Australian Gas, Wind and Solar, Hydro, Energy Marketing and Corporate. The Canadian Coal, U.S. Coal, Canadian Gas, Australian Gas, Wind and Solar, and Hydro segments are responsible for constructing, operating and maintaining its electrical generation. All the segments are supported by a Corporate segment, which includes the Corporation's central financial, legal, administrative, and investing functions.