Indianapolis Power & Light headquarters building, 1968 remodeling by Lennox, Matthews, Simmons & Ford, lighting design Norman F. Schnitker, IPL, photographed in 2009
Indianapolis Power & Light Company, also known as IPL or IPALCO, is a utility company providing electric service to the city of Indianapolis. It is a subsidiary and largest utility of AES Corporation, which acquired it in 2000.
Indianapolis Light and Heat Company and Merchant’s Heat and Light Company, merged to create IPL in October 1926. The company's present-day headquarters building on Monument Circle was built in 1935. In 1937, IPL began a rural electrification program, running power lines to many areas outside Marion County. IPL provides electric service to more than 470,000 customers in a 528-square-mile (1,370 km2) service territory.