Company: BCDRF
Filing Date: 2025-07-31
Form Type: 6-K
Source: 0000891478-25-000113
Chunk: 145

Company: Banco Santander, S.A.
Filing Date: 2025-07-31
Form: 6-K
Chunk 145
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basis points on the 5-yearMid-Swap Rate.

C.Payment is subject to certain conditions and to the discretion of Banco Santander. The 4.750% interest rate is set for the first six years, revised every 5years thereafter by applying a margin of 375.3basis points over the 5-yearUST rate.

D.Payment is subject to certain conditions and to the discretion of Banco Santander. The 4.125% interest rate is set for the first seven years, revised every 5years thereafter by applying a margin of 431.1basis points over the applicable 5-yearEuro Mid-Swap Rate.

E.Payment is subject to certain conditions and to the discretion of Banco Santander. The 3.625% interest rate is set for the first eight years, revised every 5years thereafter by applying a margin of 376basis points over the 5-yearMid-Swap Rate.

F.Payment is subject to certain conditions and to th e discretion of Banco Santander. The 9.625% interest rate is set for the first five years and six months, revised every 5years thereafter by applying a margin of 530.6basis points on the 5-yearUST rate.

G.Payment is subject to certain conditions and to the discretion of Banco Santander. The 9.625% interest rate is set for the first ten years, revised every 5years thereafter by applying a margin of 529.8basis points on the 5-yearUST rate.

| January - June 2025 |     | 159 |

H.Payment is subject to certain conditions and to the discretion of Banco Santander. The 7.00% interest rate is set for the first six years, revised every 5years thereafter by applying a margin of 443.2basis points on the 5-yearMid-Swap rate.

I.Payment is subject to certain conditions and to the discretion of Banco Santander. The 8.00% interest rate is set for the first ten years, revised every 5years thereafter by applying a margin of 391.1basis points on the 5-yearMid-Swap rate.

| 160 |     | January - June 2025 |

| Part 2. Supplemental information |

| January - June 2025 |     | 161 |

### INDEX TO THE SUPPLEMENTAL INFORMATION
|                                                                   |     | Page |
| ITEM 1. PRESENTATION OF FINANCIAL AND OTHER INFORMATION           |     |  163 |
| ITEM