Drawing on goal-setting and stewardship theories, this study examines the management of family and business goals in family firms under transgenerational complexity, presenting a dynamic model of family stewardship. Through multiple case studies, we identify four distinct stewardship strategies, each with a corresponding governance structure: cultivating family stewardship (with family-dense governance), professionalizing family stewardship (with professionalized governance), harnessing external stewardship (with externally-dense governance), and perpetuating external stewardship (with public companies’ governance). These strategies shift from family-centric to business-centric goal-setting approaches in sustaining the family firm. The study introduces stewardship transition capability as a missing cog for managing these transitions.