Chief executive officers (CEOs) engage in activism when they take public stances on sensitive socio-political issues. In this study, we address the less-explored activities that constitute CEO activism beyond single stances as the activism is maintained over time. The data cover 6 years of campaign and media materials from a case company with several CEO-initiated activist campaigns. Our findings from an inductive analysis contribute to CEO activism theorizing in three ways. First, we extend CEO activism conceptually by identifying five underlying (...) activities that support a public stance: anchoring motivations, modeling action, taking agency, enduring criticism, and normalizing activism. Second, we bridge individual- and organization-level analyses by depicting how a CEO involves a company in activism through activities that justify interrelated topic frame and role frame. Third, we develop a processual model that includes the pre-stance, stance-taking, and post-stance phases and explains how the underlying activities are interrelated and follow a pattern that serves to maintain CEO activism. Accordingly, CEO activism includes activities, through the pre-stance, stance-taking, and post-stance phases, whereby a CEO deliberately engages personally and through a company in public debate about sensitive socio-political issues and the role of businesses in addressing them. (shrink)