The corporatization of air traffic control (ATC), i.e. its removal from government control began in New Zealand in 1987. Several countries now propose similar restructuring of their ATC. This paper considers the issues involved in the change, e.g. budget, procurement problems. The evidence of corporatization from both New Zealand and Germany is detailed as it provides many useful lessons. Two proposed major changes to the ATC structure in the UK and US are outlined. The likelihood of successful restructuring in both these countries in the light of the experience of the existing corporate ATC structures is considered.