Banco Santander, S.A. Completes TSB Banking Group Acquisition

Banco Santander, S.A. has announced the completion of its acquisition of TSB Banking Group, plc. The acquisition was finalized on April 30, 2026, under the terms previously disclosed. This filing serves as a report of other relevant information in compliance with securities market legislation. The company confirms that this document does not constitute an offer to sell or a solicitation of an offer to purchase securities.