American Electric Power owns more than 36,000 megawatts of generating capacity in the United States and is the nation's largest electricity generator. It also ranks among the largest electric utilities in the U.S., with more than 5 million customers linked to its 11-state electricity transmission and distribution grid. American Electric s 20,000 employees work in service centers in Arkansas, Indiana, Kentucky, Louisiana, Michigan, Ohio, Oklahoma, Tennessee, Texas, Virginia and West Virginia. American Electric Power is headquartered in Columbus, Ohio. The company was incorporated in New York state in 1906 as American Gas and Electric Company, offering electricity, gas, water and steam services to New York, New Jersey, Pennsylvania, West Virginia, Ohio, Indiana and Illinois.