Data and code belonging to the manuscript: The availability and completeness of open funder metadata - Case study for publications funded by the Dutch Research Council Abstract: Research funders spend considerable efforts collecting information on outcomes of the research they fund. To help funders track publication output associated with their funding, Crossref initiated FundRef in 2013, enabling publishers to register funding information using persistent identifiers. However, it is hard to assess the coverage of funder metadata because it is unknown how many articles are the result of funded research and therefore should include funder metadata. In this paper we looked at 5,004 publications reported by researchers to be the result of funding by a specific funding agency: the Dutch Research Council NWO. Only 67% of these articles contain funding information in Crossref, with a subset acknowledging NWO as funder name and/or Funder IDs linked to NWO (53% and 45%, respectively). Web of Science (WoS), Scopus ... : We are able to share the majority of the raw data underpinning our paper, except for part of the proprietary bibliometric data we used from Web of Science, Scopus and Dimensions. Data from Lens is available as collection here: https://www.lens.org/lens/search/scholar/list?collectionId=200429 ...