Endesa, S.A. UK Regulatory Announcement: Transaction in Own Shares

MADRID–(BUSINESS WIRE)–  Borja Acha Besga Secretary of the Board of Directors Madrid, 29 September 2026 Other relevant information In accordance with the provisions of Article 227 of Law 6/2023, of 17 March, on Securities Markets and Investment Services, Endesa, S.A. (‘Endesa’ or ‘the Company’) hereby discloses the following information: The Company’s Board of Directors, in compliance with the resolution to reduce the share capital approved under item six on the agenda of Endesa’s Ordinary Ge