ACkNOWLEdGEMENTS The authors would like to thank the subject matter experts, including platform and project practitioners, researchers, funders, and policy makers who generously gave their time to share their insights and experience, and to help us understand the breadth and scope of this issue. [...] In a trusteeship, an organization undertakes a stewardship role in response to the needs of its partners and the community, and also to the needs of funders to find ways to support new and innovative work. [...] The objective of this report is to highlight shared platforms as a model and to act as a catalyst for a more strategic conversation among funders, policy makers, practitioners and researchers about how to continue the evolution of this model of governance. [...] In the last few years, practitioners and funders together have begun to discuss issues related to shared platforms and to develop a common language and practice in an effort to evolve the concept. [...] Even where a steering/advisory committee provides the direction and informs the identity of the project, and where the roles and responsibilities between the project and the platform are clearly delineated, it may not be enough.