Company: BCDRF
Filing Date: 2025-11-28
Form Type: 6-K
Source: 0000950103-25-015387
Chunk: 1

Company: Banco Santander, S.A.
Filing Date: 2025-11-28
Form: 6-K
Chunk 1
---
 SAN      | Purchase    | AQEU    |     75,284 |   8.9400 |
| 26/11/2025 | SAN      | Purchase    | XMAD    |  1,749,025 |   9.1302 |
| 26/11/2025 | SAN      | Purchase    | CEUX    |    150,663 |   9.1293 |
| 26/11/2025 | SAN      | Purchase    | TQEX    |     23,766 |   9.1412 |
| 26/11/2025 | SAN      | Purchase    | AQEU    |     76,546 |   9.1396 |
|            |          |             | TOTAL   | 10,400,000 |          |

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), 27 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 20/11/2025 and 26/11/2025 (both inclusive)

(https://www.santander.com/content/dam/santander-com/es/documentos/cumplimiento/do-anexo-i-20-a-26-11-2025.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 28, 2025 | Banco Santander, S.A. 
 By:                   | /s/ Pedro de Mingo Kaminouchi |                              |
|:------|:------------------|:----------------------|:------------------------------|:-----------------------------|
|       |                   |                       | Name:                         | Pedro de Mingo Kaminouchi    |
|       |                   |                       | Title:                        | Head of Corporate Compliance |