What's the name of United Edison Company now?

ED is short for Edison United Electric Company.

Edison United Electric Company (ed) was established in New York State on 1997. It is a holding company, which owns all the issued common shares of new york Union Company (CECONY), Orange and rockland Utility Company (O&R). The company's main businesses are CECONY, O&R, clean energy business and gearbox. CECONY's main business is its regulation of electricity, natural gas and steam transportation business.