DPL Inc. is a diversified regional energy company. DPL's principal subsidiaries include The Dayton Power & Light Company (DP&L) and DPL Energy. DP&L provides electric services to over 500,000 retail customers in West Central Ohio. DPL Energy markets over 4,600 megawatts of generation capacity throughout the eastern United States. DPL Inc., through its subsidiaries, ranks among the top energy companies in generation efficiency and productivity. 

http://www.dplinc.com/