These data and reports are the outcome of a project the purpose of which is to gain insight into the findability of Utrecht University’s (UU) research datasets, in order to be able to improve it. The data is on 24 search engines that allow searching for research data sets, in particular on their size, functionality, and coverage of Utrecht University data sets shared publicly on the Yoda and DataverseNL data publication platforms. The reports also deal with issues regarding findability and include recommendations to solve these issues.