TransAlta Corp., headquartered in Calgary, AB, is Canada's largest publicly traded power generator and energy marketer of electricity and renewable power. Producing electricity for over 100 years, TransAlta has operations throughout Canada, the U.S. and Australia. TransAlta offers electricity and natural gas products and services for businesses that consume more than 250,000 kWh of electricity and/or 2,500 GJ of gas per year. more... See more text