Power has been an important topic amongst scholars in Information Systems (IS) research. Despite the vast literature on power in IS research, we found there is a lack of study that investigates the significance of power in a Parent-Subsidiary relationship. As a part of an ongoing research to explore the role of IS in the Parent-Subsidiary relationship, this paper highlights the impact of Enterprise Systems (ES) on the "evolution" of power as a critical aspect of that relationship. Using case study as a research method, we explore four scenarios, namely: Domination, Consultative, Empowerment, and Incitement; each with its own distinct aspects of power and its implication to ES in a corporate group environment. Ongoing research will attempt to explore the scenarios in greater details as well as expanding the number of corporate groups.