Dayton, Ohio-based DPL Inc. (NYSE: DPL), a diversified energy utility, sells electricity through its two principal subsidiaries: Dayton Power and Light Company (DP&L) and DPL Energy, LLC. DPL owns approximately 950 megawatts (MW) of peaking generation and 2,800 MW of coal-fired generation. DP&L is an electric utility with more than 513,000 residential, commercial, industrial, and governmental customers in its 6,000 square-mile service area of west-central Ohio. Non-regulated subsidiary DPL Energy markets wholesale power generated at DPL's power plants, which produce roughly 4,400 megawatts (MW) of primarily coal-fired energy. Other activities include retail power marketing and street lighting. Other subsidiaries (Plaza Building, Inc. and Miami Valley Insurance Company) provide financial support and insurance services. DPL sold its gas distribution business.