Company: BCDRF
Filing Date: 2025-11-06
Form Type: 8-A12B
Source: 0000950103-25-014410
Chunk: 1

Company: Banco Santander, S.A.
Filing Date: 2025-11-06
Form: 8-A12B
Chunk 1
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 reference from Exhibit 4.1 to the Form 6-K filed with the Commission on November 6, 2025 (Accession No. 0001193125-25-268399)). |
| 4.3  | Form of Global Note for the Senior Non Preferred Floating Rate Notes due 2030 (incorporated herein by reference from Exhibit 4.2 to the Form 6-K filed with the Commission on November 6, 2025 (Accession No. 0001193125-25-268399)).                                                                                                                                                                                                                                                                                       |
| 4.4  | Form of Global Note for the 4.551% Senior Non Preferred Fixed Rate Notes due 2030 (incorporated herein by reference from Exhibit 4.3 to the Form 6-K filed with the Commission on November 6, 2025 (Accession No. 0001193125-25-268399)).                                                                                                                                                                                                                                                                                   |
| 4.5  | Form of Global Note for the 5.127% Senior Non Preferred Fixed Rate Notes due 2035 (incorporated herein by reference from Exhibit 4.4 to the Form 6-K filed with the Commission on November 6, 2025 (Accession No. 0001193125-25-268399)).                                                                                                                                                                                                                                                                                   |
| 99.1 | The Prospectus and the Prospectus Supplement (incorporated herein to the extent provided above by reference to the Registrant’s filing under Rule 424(b) dated October 30, 2025).                                                                                                                                                                                                                                                                                                                                           |

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

Pursuant to the requirements of Section 12 the Securities
Exchange Act of 1934, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereto
duly authorized.

Banco Santander, S.A.

Issuer

| By: | /s/ José Antonio Soler           |
|     | Name:	José Antonio Soler         
 Title:	Authorized Representative |

November 6, 2025