X0203 0000876661 NEW YORK STOCK EXCHANGE LLC 0000891478 Banco Santander, S.A. 001-12518

Ciudad Grupo Santander Avda de Cantabria Boadilla del Monte (Madrid) 28660

+34 (91) 289 0000 Guarantor of Series 26 Subordinated Debt Securities due November 2025 17 CFR 240.12d2-2(a)(2) Tyler Mastronardi Analyst, Market Watch 2025-11-19