Boeing Company, American aerospace company the world’s largest that is the foremost manufacturer of commercial jet transports. It is also a leading producer of military aircraft, helicopters, space vehicles, and missiles, a standing significantly enhanced with the company’s acquisition of the aerospace and defense units of Rockwell International Corporation in 1996 and its merger with McDonnell Douglas Corporation in 1997. Formerly Boeing Airplane Company, the firm assumed its current name in 1961 to reflect its expansion into fields beyond aircraft manufacture. Headquarters were in Seattle until 2001, when Boeing relocated to Chicago. Boeing Company’s constituent business units are organized around three main