ABSTRACT Organisations across multiple sectors are prolific publishers in a range of genres including research reports, policy briefs, fact sheets, datasets and much more. Sometimes referred to as grey literature, these publications play a critical role in the circulation of research and ideas on public policy and public interest issues, yet they are often overlooked as part of the research publishing system, including on Wikipedia and Wikimedia. One of the cornerstones of Wikipedia is its reliance on citations from reliable sources, however little is known about the way in which organisation-produced and disseminated publications are understood and used as sources on Wikimedia platforms. This article reviews the literature and analyses available data on the sources used on English Wikipedia and what it can tell us about the extent to which policy reports from organisations are cited and the issues that arise with evaluating their reliability. We then provide a case study of a project underway by the Analysis & Policy Observatory (APO), a digital library of policy reports based in Australia, which aims to improve the presence of high-quality policy and research material and coverage of policy issues on Wikipedia.