Range Resources Corporation is an independent natural gas and natural gas liquids producer with operations focused on projects in the Appalachian Basin. It is engaged in the exploration, development and acquisition of natural gas and oil properties in the United States. Its principal area of operations is the Marcellus Shale in Pennsylvania. Its natural gas and oil operations are concentrated in the Appalachian region of the United States, in the Marcellus Shale in Pennsylvania. Its properties consist of interests in developed and undeveloped natural gas and oil leases. It owns over 1,428 net producing wells in Pennsylvania. Its reserves are primarily in the Marcellus Shale formation but also include the Utica and Upper Devonian formations. It has approximately 894,000 gross acres under lease. Its subsidiaries include Range Resources-Appalachia, LLC, Range Resources-Pine Mountain, LLC, Range Production Company, LLC, Range Resources-Midcontinent, LLC and Range Resources-Louisiana, Inc.