Enerplus Corporation, operating with its subsidiaries, specializes in the exploration and production of crude oil and natural gas across both the United States and Canada. The company's primary hydrocarbon assets are located predominantly in the U.S. states of North Dakota, Colorado, and Pennsylvania, as well as the Canadian provinces of Alberta, British Columbia, and Saskatchewan. As of December 31, 2021, Enerplus reported estimated total proved and probable gross reserves, which included approximately 8.2 million barrels (MMbbls) of light and medium crude oil, 20.7 MMbbls of heavy crude oil, 299.3 MMbbls of tight oil, 56.2 MMbbls of natural gas liquids, 19.7 billion cubic feet (Bcf) of conventional natural gas, and 1,367.9 Bcf of shale gas. Established in 1986, Enerplus Corporation's corporate headquarters are situated in Calgary, Canada.