In recent decades the world has witnessed an unparalleled growth of philanthropic initiatives and institutions that has proven inextricable from the vast accumulation and concentration of wealth on a global scale. Echoing recent calls for geographers to study philanthropy, this paper seeks to advance a critical geographical understanding of globalising philanthropy. Inspired by geographical scholarship on relational thinking, the paper frames the varied manifestations of contemporary philanthropy as a ‘philanthropic complex’ in order to understand philanthropy through central themes of relationality, intermediation and stabilisation. Advancing theories of philanthropy by characterising the complex's geographical unevenness and political functions of depoliticisation, the paper closes by outlining avenues in which relational thinking about philanthropy can advance geographical theories of elites and global development.