PPL Corporation, a utility holding company, delivers electricity and natural gas in the United States and the United Kingdom. The company operates through three segments: U.K. Regulated, Kentucky Regulated, and Pennsylvania Regulated. It serves approximately 425,000 electric and 332,000 natural gas customers in Louisville and adjacent areas in Kentucky; 536,000 electric customers in central, southeastern, and western Kentucky; and 28,000 electric customers in five counties in southwestern Virginia. The company also provides electric delivery services to approximately 1.4 million customers in Pennsylvania; operates electricity distribution networks in the United Kingdom; generates electricity from coal, gas, hydro, and solar sources in Kentucky; and sells wholesale electricity to two municipalities in Kentucky. PPL Corporation was founded in 1920 and is headquartered in Allentown, Pennsylvania.