Northern Oil & Gas Inc is an independent energy company engaged in the acquisition, exploration, development, and production of crude oil and natural gas properties. Its principal business is crude oil and natural gas exploration, development, and production. The company's oil and natural gas sales come from three geographic areas in the United States: the Williston Basin (North Dakota and Montana), the Permian Basin (New Mexico and Texas), the Uinta Basin, and the Appalachian Basin (Pennsylvania and Ohio).