I have no doubt that almost any industrial concern you care to name headquarters elsewhere than the colloquial locale. Does it alter the point being made where it works and where decisions are made? If I said airbus decides in Toulouse will you point out where the board actually meets?
The parent company is, but Boeing Commercial Airplanes, the subsidiary that does commercial jets, is headquartered in Washington. Their ginormous production warehouse is also outside of Seattle.
For additional context, they moved headquarters in 2001 (a few years after merging with St. Louis based McDonnell Douglas in 1997):
“The company shocked Seattle--and much of corporate America--by announcing in March that it is moving its headquarters out of the city where William Boeing created the company 85 years ago, making it synonymous with aircraft manufacturing.
“The move, Boeing said at the time, is part of a reorganization to give more independence to its three core businesses--commercial airplanes in the Seattle area, military jets and missiles in St. Louis and space and communications business in Southern California.”
