Judgment of the Court (Second Chamber) of 25 November 2020.#European Commission v GEA Group AG.#Appeal – Agreements, decisions and concerted practices – European markets for tin-based heat stabilisers and for heat stabilisers with epoxised soybean oil and esters as their base – Price fixing, market allocation and exchange of commercially sensitive information – Application of the ceiling of 10% of turnover to one of the entities forming the undertaking – Annulment of the decision amending the fine imposed in the initial infringement decision – Fines – Concept of an ‘undertaking’ – Joint and several liability for payment of the fine – Principle of equal treatment – Date on which the fine is payable in the event of amendment.#Case C-823/18 P.