Magnum Hunter Resources Corporation, an independent oil and gas company, explores for, exploits, acquires, develops, and produces crude oil, natural gas, and natural gas liquid resources in the United States. The company operates through the U.S. Upstream, Midstream, and Oilfield Services segments. It operates in two of the unconventional shale resource plays in the United States, including the Marcellus Shale and the Utica Shale plays located in the Appalachian Basin within the states of West Virginia and Ohio; and owns interests in non-operated oil and gas properties in the Williston Basin/Bakken Shale located in Divide County, North Dakota. As of December 31, 2014, the company had approximately 274,653 net leasehold acres in its principal operating areas, including 79,683 net acres in the Marcellus Shale; approximately 125,680 acres in the Utica Shale; and approximately 69,290 net acres in the Williston Basin/Bakken Shale in North Dakota. It also operates natural gas properties in Kentucky; provides midstream operations services, such as natural gas marketing, as well as the and operation of a network of pipelines and compression stations that gather natural gas and NGLs in the U.S. for transportation, principally in West Virginia and Ohio; and offers drilling services to third party oil and natural gas exploration and production companies. The company was formerly known as Petro Resources Corporation and changed its name to Magnum Hunter Resources Corporation in July 2009. Magnum Hunter Resources Corporation was incorporated in 1997 and is headquartered in Houston, Texas.