American Electric Power (AEP)

Headquartered in Columbus, Ohio, AEP is one of the largest electric utilities in the U.S., serving over 5 million customers in 11 states. AEP owns nearly 38,000 megawatts of generating capacity, more than 40,000-miles of electricity transmission network – the largest in the nation, and more 765 kilovolt extra-high voltage transmission lines than all other U.S. transmission systems combined.