This article describes a qualitative study exploring how a leadership intervention in a group context developed positivity in leaders of family businesses. Ideas are drawn from positivity in organizational scholarship and group social capital. The article makes two contributions: the first is in conceptualizing positivity in family business studies while the second is to contribute to management thought by describing how the leadership intervention developed positivity to lead and manage in leaders of family business. To the best of our knowledge, there is little research that applies these ideas in family business studies.