Company: BCDRF
Filing Date: 2025-11-06
Form Type: 6-K
Source: 0000950103-25-014400
Chunk: 1

Company: Banco Santander, S.A.
Filing Date: 2025-11-06
Form: 6-K
Chunk 1
---
 Purchase    | AQEU    |    192,535 |           8.7002 |
| 05/11/2025 | SAN      | Purchase    | XMAD    |  1,260,000 |           8.7870 |
| 05/11/2025 | SAN      | Purchase    | CEUX    |    236,977 |           8.7603 |
| 05/11/2025 | SAN      | Purchase    | TQEX    |     88,377 |           8.7494 |
| 05/11/2025 | SAN      | Purchase    | AQEU    |    214,646 |           8.7479 |
|            |          |             | TOTAL   | 13,100,000 |                  |

Issuer name: Banco Santander, S.A. - LEI 5493006QMFDDMYWIAM13

Reference of the financial instrument: ordinary shares - Code ISIN ES0113900J37

Detailed information of the transactions carried out within the referred period is attached as Annex I.

Boadilla del Monte (Madrid), 6 November 2025

<div align='center'>ANNEX I</div>

Detailed information on each of the transactions carried out within the context of the Buy-back Programme between 30/10/2025 and 05/11/2025 (both inclusive)

(https://www.santander.com/content/dam/santander-com/es/documentos/cumplimiento/do-anexo-i-30-10-a-05-11-2025.pdf )

<div align='center'>SIGNATURE</div>

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

| Date: | November 6, 2025 | Banco Santander, S.A. 
 By:                   | /s/ Pedro de Mingo Kaminouchi |                              |
|:------|:-----------------|:----------------------|:------------------------------|:-----------------------------|
|       |                  |                       | Name:                         | Pedro de Mingo Kaminouchi    |
|       |                  |                       | Title:                        | Head of Corporate Compliance |