The Fellowships Alumni Network Study (FANS)—facilitated by IREX and supported by the W.K. Kellogg Foundation—is a collaborative research initiative that brought together more than 20 partner organizations to better understand how fellowship programs can support their alumni as they create positive social change. The study identified the type of impact that fellowship networks can have at different levels of society and the characteristics in those networks that have been successful in supporting alumni to contribute to positive social change.