Company: BCDRF
Filing Date: 2025-03-27
Form Type: 6-K
Source: 0000950103-25-003866
Chunk: 1

Company: Banco Santander, S.A.
Filing Date: 2025-03-27
Form: 6-K
Chunk 1
---
      | Purchase    | AQEU    |    90,009 |            6.5699 |
| 26/03/2025 | SAN      | Purchase    | XMAD    | 1,879,008 |            6.5699 |
| 26/03/2025 | SAN      | Purchase    | CEUX    |   653,979 |            6.5612 |
| 26/03/2025 | SAN      | Purchase    | TQEX    |   164,410 |            6.5759 |
| 26/03/2025 | SAN      | Purchase    | AQEU    |   302,603 |            6.5569 |
|            |          |             | TOTAL   | 9,400,000 |                   |

1

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 March 2025

2

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

Detailed information on each of the transactions carried out within the context of the Buy-back Programme between 20/03/2025 and 26/03/2025 (both inclusive)

(https://www.santander.com/content/dam/santander-com/es/documentos/cumplimiento/do-anexo-i-20-mar-a-26-mar-2025.pdf)

3

<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: | March 27, 2025 | Banco Santander, S.A. 
 By:                   | /s/ Pedro de Mingo Kaminouchi |                              |
|:------|:---------------|:----------------------|:------------------------------|:-----------------------------|
|       |                |                       | Name:                         | Pedro de Mingo Kaminouchi    |
|       |                |                       | Title:                        | Head of Corporate Compliance |