The author points at progressive evolution of the company being expressed in the process of concentration and integration of companies in to complex, multilevel economic organisms with the letter assuming different forms. This evolutionis often not accompanied, however, by preceding it or even parallel with it process of preparing organization and business administration to functioning in novel conditions. Hence, in numerous instance there can be observed not only absence of the synergetic effect of companies fusion but integrated organisms are even characterized with lower effectivensess. This is largely clue to failure to understand that all more essential concentrating and integrating decisions possess strategic significance while their effects although difficult in analytical definition are of long-term nature. Accordingly the author stresses the necessity of undertaking planning and analytical studies of strategic character, which should precede the concentration and integration process as strategy of the company development cannot be determined with out taking in to account the existing antinomy between companies (or their groupings) planning their development with targets and strategies e.g. of competitors in foreign markets. Zadanie pt. „Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki” nr 885/P-DUN/2014 zostało dofinansowane ze środków MNiSW w ramach działalności upowszechniającej naukę.