# EDGAR Filing Document

**Accession Number:** 0000891478
**File Stem:** 0000950103-25-010950
**Filing Date:** 2025-8
**Character Count:** 4946
**Document Hash:** cb5248390cae2292eb0b954641daed97
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000950103-25-010950.hdr.sgml**: 20250829

**ACCESSION NUMBER**: 0000950103-25-010950

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20250829

**FILED AS OF DATE**: 20250829

**DATE AS OF CHANGE**: 20250829

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Banco Santander, S.A.
- **CENTRAL INDEX KEY:** 0000891478
- **STANDARD INDUSTRIAL CLASSIFICATION:** COMMERCIAL BANKS, NEC [6029]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 132617929
- **STATE OF INCORPORATION:** U3
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-12518
- **FILM NUMBER:** 251275848

**BUSINESS ADDRESS:**
- **STREET 1:** CIUDAD GRUPO SANTANDER
- **STREET 2:** BOADILLA DEL MONTE
- **CITY:** MADRID
- **STATE:** U3
- **ZIP:** 28660
- **BUSINESS PHONE:** 34 91 289 32 80

**MAIL ADDRESS:**
- **STREET 1:** CIUDAD GRUPO SANTANDER
- **STREET 2:** BOADILLA DEL MONTE
- **CITY:** MADRID
- **STATE:** U3
- **ZIP:** 28660

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BANCO SANTANDER SA
- **DATE OF NAME CHANGE:** 20070925

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BANCO SANTANDER CENTRAL HISPANO SA
- **DATE OF NAME CHANGE:** 19990512

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BANCO SANTANDER S A
- **DATE OF NAME CHANGE:** 19931201

**FORM 6-K**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**Report of Foreign Issuer**

**Pursuant to Rule 13a-16 or 15d-16 of**

**the Securities Exchange Act of 1934**

For the month of August, 2025

Commission File Number: 001-12518

**Banco Santander, S.A.**

(Exact name of registrant as specified in its charter)

**Ciudad Grupo Santander**

**28660 Boadilla del Monte (Madrid) Spain**

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F X Form 40-F

**Banco Santander, S.A.**

**TABLE OF CONTENTS**

Item <br>1 Report of Other Relevant Information dated August 29, 2025

**Item 1**

![](image_001.jpg)

**Banco Santander, S.A. (the "Issuer" or the "Bank"), in compliance with the Securities Market legislation, hereby communicates the following:** 

**<u>OTHER RELEVANT INFORMATION</u>**

**In relation to the "Issuance of Banco Santander, S.A. Internationalization Covered Bonds Series 4 – March 2026" ("*Emisión de Cédulas de Internacionalización Banco Santander, S.A. Serie 4 – Marzo 2026*"), with ISIN code ES0413900707, for an amount of one billion dolars (USD 1,000,000,000), whose Final Conditions were filed with the Spanish National Securities Market Commission (the "CNMV") on 4 March 2021 (hereinafter, as amended on the 3<sup>rd</sup> May 2023, the "Issuance" or the "Series 4")", the Issuer has carried out a process to gather the consent of each and every investor of the Issuance for the purpose of: (i) extending the maturity of the Issuance, and accordingly, (ii) modifying the applicable interest rate which should be applicable from the next interest payment date (excluded) to the new maturity date (included).**

In particular, once the consent of the holders representing 100% of the Issuance has been obtained, the following modifications have been made:

- the maturity date (previously being 4<sup>th</sup> March 2026) is extended up to the 4<sup>th</sup> September 2030; and

the interest rate (previously being Compounded SOFR 6 months plus 53.826 basis points) applicable from the next interest payment date (excluded), i.e., 4<sup>th</sup> September 2025, to the new maturity date is: Compounded SOFR 6 months plus 55.942 basis points.

In everything not expressly described in the preceding paragraphs, the same terms and conditions that were established in the Final Conditions, prior to this modification, will still apply.

New Final Conditions applicable to Series 4 can be found on the CNMV website.

Likewise, it is hereby stated that all the necessary communications have been made to the relevant bodies.

The foregoing is hereby disclosed as other relevant information for all relevant purposes.

Boadilla del Monte (Madrid), 29 August 2025

**IMPORTANT INFORMATION**

**Not a securities offer**

This document and the information it contains does not constitute an offer to sell nor the solicitation of an offer to buy any securities.

**SIGNATURE**

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.

---

| | | | | |
|:---|:---|:---|:---|:---|
| | | **Banco Santander, S.A.** | **Banco Santander, S.A.** | **Banco Santander, S.A.** |
| Date: | August 29, 2025 | By: | /s/ Pedro de Mingo Kaminouchi | /s/ Pedro de Mingo Kaminouchi |
|  |  |  | Name: | Pedro de Mingo Kaminouchi |
|  |  |  | Title: | Head of Corporate Compliance |

---