Talisman Energy Inc. was a global, independent oil and gas exploration and production company headquartered in Calgary, Alberta, Canada. It primarily focused on the exploration, development, production, and marketing of crude oil, natural gas, and natural gas liquids. The company generated revenue through the sale of these energy resources, operating in various regions including North America, the North Sea, and Southeast Asia. Founded in 1992, Talisman Energy was acquired by Spanish energy company Repsol in 2015, marking a significant shift in its corporate trajectory.