Insider knowledge is critical information about how to achieve success that is not available to the general public but is relatively well‐known to individuals within the domain and to those who have access to those individuals. The goal of this study was to examine the perceived role of insider knowledge in a sample of highly accomplished American professionals in science, technology, engineering, and mathematics (STEM). We asked participants explicitly if insider knowledge had played a role in their talent development trajectory from K–12 education to their current creative work, with questions related to experiences at the undergraduate and graduate level and during their careers. The study was exploratory, so no formal hypotheses were put forward. Given the lack of research on the topic of insider knowledge as defined in this paper, we conducted semi‐structured interviews with a select group of individuals who had successful careers in STEM fields, both to see if insider knowledge was something that they considered important and to see if they felt that insider knowledge had played a role in their educational and career trajectories. Our hope is that the results of this paper will inform future in‐depth studies on the topic of insider knowledge.