Through a case study of locating shared stockpiles at the United Nations Water Sanitation and Health (WASH) cluster, we contribute to literature by characterizing the real overriding complexities that impact location of shared humanitarian stockpiles. We find that unique complexities related to 1) demand patterns/projections, 2) charter and commercial transport rate structures and uncertainties, 3) interagency supply and dispatch networks, 4) how programs and donors define service requirements and provide direction, and 5) in-kind service donations, all come into play and materially affect the analysis. We recommend that further research be done in these areas.