Cleveland Electric Illuminating Company, commonly known as The Illuminating Company, was a publicly traded operating company through 1986, until it merged with Toledo Edison to come under the control of Centerior. Having been acquired by 1929, by 1940 it had become one of ten major direct subsidiaries of North American Company, which in turn had been one of the original 12 stocks listed in the Dow Jones Industrial Average. It is one of two power companies serving Greater Cleveland, the other being city-owned Cleveland Public Power.