Do EU administrative networks help to preserve executive power at the member-state level, or centralize executive power at the EU level? This article examines how resource pooling takes place in the European Medicines Regulatory Network (EMRN), and the relevance of organizational structure in explaining this. By doing so the article adds both empirically and theoretically to the literature. The article presents new insights on intra-network decision behaviour, showing how network participants, under the coordination of an EU agency, pool resources by sharing knowledge, information, practices and experiences, and by routinized division of labour. Furthermore, applying an organizational perspective the article identifies some organizational structural factors that facilitate resource pooling and contribute to centralization of the EMRN. The findings thus have implications for the debate on the effects of establishing EU regulaory networks.