Judgment of the Court (First Chamber) of 4 September 2025.#European Data Protection Supervisor v Single Resolution Board.#Appeal – Protection of natural persons with regard to the processing of personal data – Procedure for granting compensation to shareholders and creditors of a banking institution following the resolution of that institution – Decision of the European Data Protection Supervisor finding that the Single Resolution Board failed to fulfil its obligations relating to the processing of personal data – Regulation (EU) 2018/1725 – Article 15(1)(d) – Obligation to inform the data subject – Transmission of pseudonymised data to a third party – Article 3(1) – Concept of ‘personal data’ – Article 3(6) – Concept of ‘pseudonymisation’.#Case C-413/23 P.