This study examines the impact of corporate restructuring measured at the industry level on industry concentration in 695 4-digit US industries in the basic, manufacturing and services sectors between 1981 and 1989. The results show a modest increase in median industrial concentration in sample industries between 1981 and 1989. We find no evidence that selloffs of assets at the industry level through horizontal mergers, acquisitions, and inter-firm asset sales increased US industrial concentration during the 1980s.