Whiting Petroleum Corporation is an independent oil and gas company that explores for, develops, and produces crude oil, natural gas, and natural gas liquids (NGLs) in the United States. The company's operations are focused primarily in the Williston Basin of North Dakota and Montana, where it holds approximately 425,000 net acres. Whiting Petroleum's other operations include the Redtail field in the Denver-Julesburg Basin of Colorado and the Postle field in the Oklahoma Panhandle. The company was founded in 1980 and is headquartered in Denver, Colorado.