Some companies grow while others do not. A theory developing study on what CEOs of fast growing SMEs and stables sales SMEs do different in terms of applying growth determinants under their control that can explain the difference in performance, lead to an organic growth model. Determinants such as market, age of the firm and others that cannot be influenced were disregarded. This developed theory claims that the application of growth determinants by CEOs lead via the intermediate variable growth momentum to growth. Growth momentum comprises employees that (i) know company objectives, (ii) are motivated to achieve these objectives and (iii) have the opportunity to perform. The organic growth model is tested via 19 hypotheses.