Abstract
This paper presents the results of the research in the dynamics of changes in the economic activities of large enterprises in Poland. On that base is done the attempt of the assess trends and changes in the number of employees, assets, capital expenditures and revenues for the realization of the overall objectives of structural changes in the economy. Results of the research of dynamics of the analyzed measures do not allow for a clear indication of the direction of change. The results show the need for a detailed study of the structural changes and the level of concentration and deconcentration of large enterprises in Poland.