The capital concentration processes taking place on the public market relate also to enterprises from the food industry. Reports on the planned take-overs and the take-over process itself exert a strong influence on the market of shares of the companies that are being taken over and, consequently, on the shareholders' profits. The prices of shares begin to grow tangibly already in the period preceding the take-over, which can be ascribed to the fact that information about the take-over plans reaches investors and which confirms the hypothesis about the information efficiency of the capital market. However, the highest growth in share prices takes place a few days after the take-over. The results of the conducted research indicate that the investors who would buy the shares of food companies a month before the take-over and who would sell them a month after the take-over could count on the average rate of return of over 15%.