Con Edison traces its origins to 1823 when the New York Gas Light Company was established. The company has evolved into one of the largest investor-owned energy businesses in the United States. Through its subsidiaries, it provides electric services to customers in New York City and Westchester County, gas to parts of Manhattan and the Bronx, and steam to Manhattan. The company also operates transmission infrastructure projects through Con Edison Transmission. Over the years, it has expanded its services while maintaining its core focus on energy delivery.