ABSTRACT This article examines the importance of sharing and eating in constructing personhood, reproducing social institutions, and reenacting social value. Based on 18 months of fieldwork among the Indigenous Mentawai living on Siberut Island (Indonesia), it examines eating and sharing that hint at food’s importance in the Mentawai’s idea of family, kinship, and mutuality. Eating and sharing food are not merely digestive activities; they constitute a process whereby the Mentawai redefine and remake their mutuality with others. At once material, moral, affective, and symbolic, Mentawai sharing and eating reveals how nourishment is shaped not just by food materiality or mode of livelihood but also by how they develop creative social relations with non-human entities. I argue that it is only by pursuing the Mentawai’s mode of thinking and relating with more-than-human beings that one may understand the centrality of sharing in bringing humans and non-human persons together in a shared world.