OGE Energy Corp. (OGE Energy) is an energy and energy services provider offering physical delivery and related services for both electricity and natural gas primarily in the south central United States. The Company operates through two segments: electric utility and natural gas midstream operations. The electric utility segment generates, transmits, distributes and sells electric energy in Oklahoma and western Arkansas. Its operations are conducted through Oklahoma Gas and Electric Company (OG&E). OG&E is an electric utility in Oklahoma and its franchised service territory includes Fort Smith, Arkansas and the surrounding communities. The natural gas midstream operations segment represents the Company's investment in Enable Midstream Partners, LP (Enable) through subsidiaries, and ultimately OGE Enogex Holdings LLC (OGE Holdings). Enable's assets and operations are organized into two segments: gathering and processing, and transportation and storage.