The Boeing Company (pronounced /ˈboʊ.ɪŋ/ BOH-ing) (NYSE: BA) is an American multinational aerospace and defense corporation. Founded in 1916 by William E. Boeing in Seattle, Washington, the company has expanded over the years, and merged with McDonnell Douglas in 1997. Boeing moved its corporate headquarters from Seattle to Chicago, Illinois, in 2001. Boeing is made up of multiple business units, which are Boeing Commercial Airplanes (BCA); Boeing Defense, Space & Security (BDS); Engineering, Operations & Technology; Boeing Capital; and Boeing Shared Services Group.
Boeing is among the largest global aircraft manufacturers, and the second largest aerospace and defense contractor in the world based on defense-related revenue from 2011. The company is the largest exporter by value in the U.S., and its stock is a component of the Dow Jones Industrial Average.