Company: BCDRF
Filing Date: 2025-10-31
Form Type: 424B5
Source: 0001193125-25-260533
Chunk: 3

Company: Banco Santander, S.A.
Filing Date: 2025-10-31
Form: 424B5
Chunk 3
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 Amounts Due; |

| • |     | the amendment or alteration of the maturity of the Notes or amendment of the interest payable on the Notes, or 
 the date on which the interest becomes payable, including by suspending payment for a temporary period; and    |

(ii) that the terms of the Notes are subject to, and may be varied, if necessary, to give effect to, the exercise of the Bail-inPower by the Relevant Resolution Authority. For these purposes, “Amounts Due” are the principal amount of, premium, if any, together with any accrued but unpaid interest, and Additional Amounts (as defined herein), if any, due on the Notes. References to such amounts will include amounts that have become due and payable, but which have not been paid, prior to the exercise of the Bail-inPower by the Relevant Resolution Authority. “Applicable Banking Regulations” means at any time the laws, regulations, requirements, guidelines and policies relating to capital adequacy, resolution and/or solvency including, among others, those giving effect to the MREL and the TLAC or any equivalent or successor principles, then applicable to Banco Santander and/or the Group including, without limitation to the generality of the foregoing, the CRD, the BRRD, the SRM Regulation and those regulations, requirements, guidelines and policies relating to capital adequacy, resolution and/or solvency of the Regulator then applicable to Banco Santander and/or the Group including, among others, those giving effect to the MREL and the TLAC or any equivalent or successor principles, in each case to the extent then in effect in the Kingdom of Spain (whether or not such regulations, requirements, guidelines or policies have the force of law and whether or not they are applied generally or specifically to Banco Santander and/or the Group). For these purposes, a “Bail-inPower” means any power existing from time to time under, and exercised in compliance with, any laws, regulations, rules or requirements in effect in the Kingdom of Spain, relating to (i) the transposition of the BRRD (as defined herein), including its article 48 and, when applicable, its article 59 (therefore, the write-down capital conversion power at the point of non-viability)(including but not limited to, Law 11/2015, RD 1012/2015 (as defined herein) and any other implementing S-i

regulations), (ii) the SRM Regulation (as defined herein) and