Aon Center (Chicago) Aon Center (Chicago) The Aon Center (200 East Randolph Street, formerly Amoco Building) is a modern supertall skyscraper in the Chicago Loop, Chicago, Illinois, United States, designed by architect firms Edward Durell Stone and The Perkins and Will partnership, and completed in 1974 as the Standard Oil Building. With 83 floors and a height of 1,136 feet (346 m), it is the third tallest building in Chicago, surpassed in height by the Willis Tower, and the Trump International Hotel and Tower. The building is managed by Jones Lang LaSalle, which is also headquartered in the building. Aon Center formerly had
Sears history of the old company, celebrating the original 1892 incorporation, rather than the 1906 revision, as the start of the company. Sears' successful 1906 initial public offering (IPO) marks the first major retail IPO in American financial history and represented a coming of age, financially, of the consumer sector. The company traded under the ticker symbol S, and was a component of the Dow Jones Industrial Average from 1924 to 1999. In 1906, Sears opened its catalog plant and the Sears Merchandise Building Tower in Chicago's West Side. The building was the anchor of what would become the massive Sears,