OGE Energy Corp. provides energy and offers physical delivery and related services for both electricity and natural gas, primarily in the south central United States. It is the parent company of Oklahoma Gas and Electric Company (OG&E) and holder of a limited partner interest and general partner interest in Enable Midstream Partners. OG&E is the largest electric utility in Oklahoma and its franchised service territory the Fort Smith, AR area. OGE Energy operates its business through the electric utility, Oklahoma Gas and Electric Company (OG&E) and Natural Gas Midstream Operations divisions. OGE Energy's subsidiary, OG&E, is an electric utility in Oklahoma. The electric utility generates, transmits, distributes and sells electric energy in Oklahoma and western Arkansas.