Case C-546/18: Judgment of the Court (Fourth Chamber) of 9 September 2021 (request for a preliminary ruling from the Bundesverwaltungsgericht — Austria) — FN, GM, Adler Real Estate AG, HL, Petrus Advisers LLP v Übernahmekommission (Reference for a preliminary ruling — Company law — Takeover bids — Directive 2004/25/EC — Article 5 — Mandatory bid — Article 4 — Supervisory authority — Definitive decision establishing an infringement of the obligation to submit a takeover bid — Binding effect of that decision in the context of subsequent administrative-penalty proceedings conducted by the same authority — Principle of the effectiveness of EU law — General principles of EU law — Rights of the defence — Charter of Fundamental Rights of the European Union — Articles 47 and 48 — Right to silence — Presumption of innocence — Access to an independent and impartial tribunal)