European Air Transport has its head office in Building 4-5 on the grounds of Brussels Airport and in Zaventem. Belgium's airspace is generally considered to be the busiest and most complex of Europe.
Ingersoll Rand has its European headquarters in the Alma Court building in Sint-Stevens-Woluwe, Zaventem.
Also, the Belgian space technology company Space Applications Services N.V./S.A. (SAS) is based in Zaventem, with its subsidiary located in Houston, Texas, USA.
Former companies
When it existed, Virgin Express had its head office in Building 116 on the grounds of Brussels Airport and in Zaventem. SN Brussels, which formed in 2002, had its head office in Airport Building 117 when it existed. Prior to its disestablishment, Sabena had its head office in the Sabena House in Zaventem. Prior to its disestablishment, Sobelair had its head office in Building 45 on the grounds of the airport and in Zaventem. When Trans European Airways existed, its head office was in Building 117 of Melsbroek Airport. When CityBird existed its head office was in Building 117D in Melsbroek Airport in Zaventem. When Cargo B Airlines existed, its head office was in the Brucargo Building 706 in Zaventem
