Judgment of the Court (Fifth Chamber) of 18 June 2026.#Vodovody a kanalizace Přerov, a.s. v Úřad pro ochranu osobních údajů.#Reference for a preliminary ruling – Approximation of laws – Open data and the re-use of public sector information – Directive (EU) 2019/1024 – Article 2(3) – Jurisdiction of the Court of Justice – Concept of ‘public undertaking’ – Undertaking owned by several public sector bodies – Presumption of ‘dominant influence’