Company: BCDRF
Filing Date: 2025-11-13
Form Type: 6-K
Source: 0000950103-25-014654
Chunk: 1

Company: Banco Santander, S.A.
Filing Date: 2025-11-13
Form: 6-K
Chunk 1
---
 | SAN      | Purchase    | AQEU          |          131,436 |           9.2172 |
| 12/11/2025 | SAN      | Purchase    | XMAD          |        1,865,171 |           9.5153 |
| 12/11/2025 | SAN      | Purchase    | CEUX          |           81,004 |           9.4919 |
| 12/11/2025 | SAN      | Purchase    | TQEX          |           14,750 |           9.4897 |
| 12/11/2025 | SAN      | Purchase    | AQEU          |           39,075 |           9.4586 |
|            |          |             | TOTAL         |        9,900,000 |                  |

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), 13 November 2025

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

(https://www.santander.com/content/dam/santander-com/es/documentos/cumplimiento/do-anexo-i-06-a-12-11-2025.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 13, 2025 | Banco Santander, S.A. 
 By:                   | /s/ Pedro de Mingo Kaminouchi |                              |
|:------|:------------------|:----------------------|:------------------------------|:-----------------------------|
|       |                   |                       | Name:                         | Pedro de Mingo Kaminouchi    |
|       |                   |                       | Title:                        | Head of Corporate Compliance |