1st NRG Corp. explores, develops, produces, and sells natural gas properties in the United States. The company holds interests in the Clabaugh Ranch property comprising 42 producing wells, 1 permitted location, and 2,821 undeveloped acres located in the Powder River Basin in northeast Wyoming. It also holds interests in shale plays covering approximately 7,000 acres situated in Ohio. The company was founded in 1988 and is headquartered in Denver, Colorado.