The report on the project “REACH Compliance: Data Availability of ⁠REACH⁠ Registrations” presents findings and results from the screening of 1932 dossiers of lead and individual registrants covering phase-in substances with a production volume of equal or above 1000 tpa. The standard information requirements necessary for the registration and their adaptation options for high tonnage substances are specified in the REACH Regulation (EC) No 1907/2006, Annexes VII to XI. Within this project, the availability of data to fulfil these requirements was screened with a standardised web-based ap-proach. The endpoints considered were repeated dose toxicity, developmental and reproductive tox-icity, and genetic toxicity as human health-related endpoints and degradation (biotic, abiotic), bioac-cumulation, ecotoxicity and exposure as environment-related endpoints.