Enerplus Corporation, together with subsidiaries, engages in the exploration and development of crude oil and natural gas in the United States and Canada. The company's oil and natural gas properties are located primarily in North Dakota, Colorado, and Pennsylvania; and Alberta, British Columbia, and Saskatchewan. As of December 31, 2021, it had proved plus probable gross reserves of 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. Enerplus Corporation was founded in 1986 and is headquartered in Calgary, Canada.