Bank One Corporation
Bank One Corporation was an American bank founded in 1968 and at its peak the sixth-largest bank in the United States. It traded on the New York Stock Exchange under the stock symbol ONE. The company merged with JPMorgan Chase & Co. on July 1, 2004, with its CEO Jamie Dimon taking the lead at the combined company. The company had its headquarters in the Bank One Plaza (now the Chase Tower) in the Chicago Loop in Chicago, Illinois, now the headquarters of Chase's retail banking division. Bank One traces its roots to the merger of Illinois based First Chicago NBD, and  Ohio-based First Banc Group (later Bank One),  a holding company for the City National Bank in Columbus, Ohio.