Judgment of the Court (Second Chamber) of 19 September 2024.#Booking.com BV and Booking.com (Deutschland) GmbH v 25hours Hotel Company Berlin GmbH and Others.#Request for a preliminary ruling from the Rechtbank Amsterdam.#Reference for a preliminary ruling – Competition – Article 101 TFEU – Agreements between undertakings – Contracts concluded between an online reservation platform and hoteliers – Price parity clauses – Ancillary restraint – Block exemption – Vertical agreements – Regulation (EU) No 330/2010 – Article 3(1) – Definition of the relevant market.#Case C-264/23.