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Abstract
In 1975 the three leading iron ore companies, CVRD, USX and LKAB controlled 19 per cent of Western world production. In 1993 this figure had increased to 34 per cent and CVRD was still to find at the top followed by BHP and RTZ. This is a unique trend of increasing corporate concentration. In most major non-ferrous minerals and metals a deconcentration has taken place during the same period. This paper surveys the corporate structure of the iron ore industry during the last 20 years. Present changes in ownership and control are discussed and possible future trends are identified.