Case C-581/22 P: Judgment of the Court (First Chamber) of 4 October 2024 – thyssenkrupp AG v European Commission (Appeal – Competition – Regulation (EC) No 139/2004 – Concentration between undertakings – Decision declaring the concentration incompatible with the internal market and the functioning of the EEA Agreement – Determination of the relevant markets – Significant impediment to effective competition – Creation or strengthening of a dominant position – Non-coordinated effects – Standard of proof – Concepts of important competitive force and close competitors – Closeness of competition between the merging parties – Herfindahl-Hirschmann Index – Requests for information