While business ethics (BE) courses have increasingly formed part of business school curricula, we still do not know much about how these courses can change students’ capacity to deal with ethical issues. Drawing on a sensemaking perspective, we conducted an action research study with 66 business professionals enrolled in an executive training program at a French university. The aim was to investigate the processes underlying ethical judgment (EJ) change through a BE course. Participants were invited to pick a significant ethical issue they had personally experienced at work. They were then asked to make sense of it, in writing, at the beginning and at the end of the course, 3 months later. In comparing pre-course and post-course judgments, we concluded that the structure and contents of the respondents’ initial judgment had indeed been modified. This change could be accounted for as the outcome of four ‘sense-remaking’ mechanisms, which we theorize as complexifying, reprioritizing, conceptualizing and contextualizing. Our study contributes to the literature on BE education by demonstrating the benefits of a sensemaking approach. It also offers an original process-based model of EJ, specifying the mechanisms at play in EJ change. Finally, it contributes to the field of sensemaking studies by introducing the concept of sense-remaking, shedding new light on the evolutive dimension of sensemaking.