This chapter reviews the results of a study into corporate investment with reference to a current life cycle phase of an industrial enterprise. For the purposes of the study, a score-based model of corporate age evaluation was used taking into account objectives of the study and sampling specifics. The study based on Russian extraction companies reveals that massively growing companies tend to intensively raise their capital funds through loans predominantly. Once mature, they show a low-key investment activity. Aging companies lose flexibility from the perspective of effective investment instruments, reduce reinvestment, and enter stagnation.