The imminent application of Clinical Trial Regulation (EU) No. 536/2014, estimated to happen in 2020, will peak an emergent era of transparency in clinical development. The regulation applies to all interventional clinical trials (Phase 1 to 4) performed in the European Union (EU)/European Economic Area (EEA), plus additionally specified paediatric trials, and covers documents at the single clinical trial level irrespective of the drug’s marketing approval status. The regulation requires the disclosure of the study Protocol, Investigational Medicinal Product Dossier (IMPD; Sections S and E), Investigator’s Brochure (IB), Subject Information Sheet, Clinical Study Report (CSR; redacted) and a Plain Language Summary (PLS; also known as a Laypersons Summary) for each clinical trial within 12 months of the end of the trial (6 months for paediatric trials). Disclosure is readily welcomed by study participants who want to know what has been learned from their participation and is in accordance with the European Medicines Agency’s (EMA) goal of protecting and fostering public health by allowing better‑informed use of medicines. We will be able to learn from past successes as well as failures now that any biased under‑reporting of results will be stopped.