Judgment of the Court (Tenth Chamber) of 19 March 2026.#Mainova AG and enercity AG v European Commission.#Appeal – Competition – Regulation (EC) No 139/2004 – Concentration between undertakings – German electricity and gas markets – Acquisition by E.ON SE of the distribution and retail business of RWE AG – Decision declaring the concentration compatible with the internal market and the functioning of the Agreement on the European Economic Area of 2 May 1992.#Joined Cases C-178/24 P and C-179/24 P.