Company: BCDRF
Filing Date: 2025-02-28
Form Type: 20-F
Source: 0000891478-25-000054
Chunk: 1099

Company: Banco Santander, S.A.
Filing Date: 2025-02-28
Form: 20-F
Chunk 1099
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| 101.CAL        |     | Inline XBRL Taxonomy Extension Calculation Linkbase Document                                                                                                                                                                                                                                                                                                                                                     |
| 101.LAB        |     | Inline XBRL Taxonomy Extension Label Linkbase Document                                                                                                                                                                                                                                                                                                                                                           |
| 101.PRE        |     | Inline XBRL Taxonomy Extension Presentation Linkbase Document                                                                                                                                                                                                                                                                                                                                                    |
| 101.DEF        |     | Inline XBRL Taxonomy Extension Definition Linkbase Document                                                                                                                                                                                                                                                                                                                                                      |

We will furnish to the SEC, upon request, copies of any unfiled instruments that define the rights of holders of long-term debt of Santander.

| 978 |

| Contents |     | Cross-reference to Form 20-F |     | Consolidated director's report |     | Consolidated financial statements |     | Supplemental information |

#### 18. Signature
The registrant hereby certifies that it meets all of the requirements for filing on Form 20-F and that it has duly caused and authorized the undersigned to sign this annual report on its behalf.

| BANCO SANTANDER, S.A. |     |                     |     |                         |
| By:                   |     | /s/ José G. Cantera |     |                         |
|                       |     | Name:               |     | José G. Cantera         |
|                       |     | Title:              |     | Chief Financial Officer |

Date: 28 February 2025

| 979 |