Company: BCDRF
Filing Date: 2025-01-08
Form Type: 424B5
Source: 0001193125-25-003514
Chunk: 71

Company: Banco Santander, S.A.
Filing Date: 2025-01-08
Form: 424B5
Chunk 71
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 means Banco Santander, 
 S.A. and its consolidated subsidiaries;                                                   |

| • |     | “debt securities” refers to the senior preferred debt securities, senior non preferred debt securities 
 and subordinated debt securities;                                                                      |

| • |     | “senior preferred debt securities” refers to the senior preferred unsubordinated debt securities issued 
 by Banco Santander;                                                                                     |

| • |     | “senior non preferred debt securities” refers to the senior non preferred unsubordinated debt 
 securities issued by Banco Santander;                                                         |

| • |     | “securities” refers to the debt securities and the contingent convertible capital securities; |

| • |     | “subordinated debt securities” refers to the subordinated debt securities issued by Banco Santander; |

| • |     | “we”, “our” and “us” refers to Banco Santander as issuer; |

| • |     | “$”, “US$”, “U.S. dollars” and “dollars” refer to United States dollars; 
 and                                                                      |

| • |     | “€” and “euro” refer to euro. |

1

USE OF PROCEEDS

Unless we have disclosed a specific plan in the accompanying prospectus supplement, we will use the net proceeds from the sale of the
securities offered by this prospectus for general corporate purposes. The Group has raised capital in various markets from time to time and we expect to continue to raise capital in appropriate markets as and when required.

BANCO SANTANDER, S.A.

Banco Santander, S.A. is the parent bank of the Group. The Group operates principally in Spain, the United Kingdom, other European countries,
Brazil and other Latin American countries and the United States, offering a wide range of financial products. In Latin America, the Group has majority shareholdings in banks in Argentina, Brazil, Chile, Mexico, Peru, Colombia and Uruguay.

Banco Santander, S.A. was established on March 21, 1857 and incorporated in its present form by a public deed executed in Santander,
Spain, on January 14, 1875. Banco Santander, S.A. is incorporated under, and governed by, the laws of the Kingdom of Spain as a company with unlimited duration and with limited liability (sociedad anónima).

Banco Santander, S.A. conducts business under the commercial name “Santander”. The Group’s principal corporate offices are
located in Ciudad Grupo Santander