Banco Santander Files 6-K Report

TL;DR

Santander filed a 6-K on 8/29, confirming 20-F annual reports. Standard compliance update.

AI Summary

Banco Santander, S.A. filed a Form 6-K on August 29, 2025, reporting information relevant to its operations. The filing indicates that the company is a foreign issuer and complies with the Securities Exchange Act of 1934. It also confirms that Banco Santander, S.A. files annual reports under Form 20-F.

Why It Matters

This filing provides an update on Banco Santander's regulatory compliance and reporting status, which is important for investors tracking the company's adherence to SEC requirements.

Risk Assessment

Risk Level: low — This is a routine regulatory filing (6-K) that does not appear to contain material new financial information or significant corporate events.

Key Players & Entities

• Banco Santander, S.A. (company) — Registrant
• 0000950103-25-010950 (filing_id) — Accession Number
• 20250829 (date) — Filing Date
• 001-12518 (company_id) — SEC File Number

FAQ

Filing Documents

• dp233674_6k.htm (6-K) — 20KB
• image_001.jpg (GRAPHIC) — 5KB
• 0000950103-25-010950.txt ( ) — 28KB

From the Filing

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 1 Report of Other Relevant Information dated August 29, 2025 Item 1 Banco Santander, S.A. (the “ Issuer ” or the “ Bank ”), in compliance with the Securities Market legislation, hereby communicates the following: OTHER RELEVANT INFORMATION 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 rd 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 th March 2026) is extended up to the 4 th 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 th 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. Date: August 29, 2025 By: /s/ Pedro de Mingo Kaminouchi Name: Pedro de Mingo Kaminouchi Title: Head of Corporate Compliance

View Full Filing

View this 6-K filing on SEC EDGAR