American Electric Power Company, Inc. is a utility holding company. It operates in five segments. The vertically integrated utilities segment generates, transmits and distributes electricity through AEP Generating Company, Appalachian Power Company, Indiana Michigan Power Company, Kingsport Power Company, Kentucky Power Company, Public Service Company of Oklahoma, Southwestern Electric Power Company and Wheeling Power Company. The Transmission and Distribution Utilities segment transmits and distributes electricity through Ohio Power Company, AEP Texas Central Company and AEP Texas North Company. The Generation & Marketing segment’s subsidiaries consist of nonutility generating assets, a wholesale energy trading and marketing business and a retail supply and energy management business. AEP Transmission Holdco is a holding company for AEP’s transmission joint ventures and AEP Transmission Company, LLC. The AEP River Operations segment transports liquid, coal and dry bulk commodities.