The Duquesne Lighting Company is located in Pittsburgh, Pennsylvania. As of 2015, the mailing address for general comments and any legal questions is 411 Seventh Avenue, Pittsburgh, PA, 15219.
Duquesne Light Holdings began operation in 1989 as the holding company of Duquesne Light Company. The parent company of Duquesne Lighting Company is DQE Holdings, who bought the company in 2007. As of 2015, the company provides electricity to about 588,000 residential and commercial properties.
Duquesne Light Company began as a subsidiary of the holding company Philadelphia Company by George Westinghouse, who also owned several other subsidiaries. Today, the main owners are GIC Private Limited, IFM Investors and Macquarie Group.