The objective of this study is to determine the role of hubris on innovation activities, a crucial function of company founders (e.g. Schumpeter, 1934). For the empirical analysis, an inductiveinterpretative approach enables theory development through an in-depth exploration of human behavior. The data set comprises 26 interviews with various experts. Prior to the actual data collection, the interviewees received an email with a summary of characteristic hubristic patterns (cf. Petit & Bollaert, 2011) and the request to report case studies of founders with respective patterns. In sum, the interviewees described approximately 40 case studies of hubristic founders. In order to enrich the perceptions of the experts, a second data set was compiled containing nine interviews with hubristic founders who shared the stories behind their company failures in the event series “FuckUp Nights”.