With the high interest in startup teams, many studies have been conducted on the development and performance of startup support program in an university. Most of them focus on individual characteristics and competencies such as startup intention and entrepreneurship and not much of them focus on the properties and actions of startup teams in real. Besides, there are too much weight on quantitative studies that estimate the performance of startup support programs only by quantitative measurements like the number and the sales of startups and they tend to overlook the process of how startup teams are acting and how their actions are leading to the outcomes. This case study of S University Startups Support Program characterizing team coaching researched how startup teams have been performing and how their performances were led to the outcomes. In order to identify the factors and dynamics of team coaching and team performance, the IMO model was applied to analyze the properties of startup teams, team actions, and the interventions of team coaching. As the results of the analysis have shown, the study captured the changes and growth of the startup teams that had been overlooked by the extant researchers a