KO Transmission Company is an interstate pipeline company engaged in the business of transporting natural gas in interstate commerce under authorization granted by and subject to the jurisdiction of the Federal Energy Regulatory Commission. Its clients include Integrys, Proliance Energy, Interstate Gas Supply, Volunteer Energy Services and LaFarge Corporation. KO Transmission Company is a wholly owned subsidiary of Duke Energy Corporation. Duke Energy Corporation s marketing and energy affiliates include Cinergy Capital & Trading, DETM Marketing Northeast and Duke Energy Marketing America. KO Transmission Company also provides administration services for daily pipeline activities, nominations, confirmations and billings.