Banco Santander Files 6-K Report

Ticker: BCDRF · Form: 6-K · Filed: Dec 18, 2025 · CIK: 891478

Banco Santander, S.A. 6-K Filing Summary
FieldDetail
CompanyBanco Santander, S.A. (BCDRF)
Form Type6-K
Filed DateDec 18, 2025
Risk Levellow
Pages2
Reading Time2 min
Sentimentneutral

Sentiment: neutral

Topics: regulatory-filing, sec-compliance, foreign-issuer

TL;DR

Santander filed a 6-K on Dec 18, 2025, confirming its reporting status and 20-F filings.

AI Summary

Banco Santander, S.A. filed a Form 6-K on December 18, 2025, reporting other relevant information. The filing indicates that the company is a foreign issuer and complies with reporting requirements under 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 with no new financial or operational information that would indicate increased risk.

Key Players & Entities

  • Banco Santander, S.A. (company) — Registrant
  • 001-12518 (company) — SEC File Number
  • December 18, 2025 (date) — Filing Date
  • Form 20-F (document) — Annual Report Filing
  • Form 6-K (document) — Report Type

FAQ

What is the purpose of this Form 6-K filing by Banco Santander, S.A.?

The Form 6-K filed on December 18, 2025, is a Report of Foreign Issuer pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934, reporting other relevant information.

What is Banco Santander, S.A.'s SEC file number?

Banco Santander, S.A.'s SEC file number is 001-12518.

Does Banco Santander, S.A. file annual reports under Form 20-F or Form 40-F?

Banco Santander, S.A. indicates that it files annual reports under cover of Form 20-F.

When was this Form 6-K filed?

This Form 6-K was filed on December 18, 2025.

What is the principal executive office address for Banco Santander, S.A.?

The principal executive office address is Ciudad Grupo Santander, 28660 Boadilla del Monte (Madrid), Spain.

Filing Stats: 576 words · 2 min read · ~2 pages · Grade level 8.3 · Accepted 2025-12-18 06:09:00

Filing Documents

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 December, 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 December 18, 2025 Item 1 Banco Santander, S.A. (the “ Bank ” or “ Banco Santander ”), in compliance with the Securities Market legislation, hereby communicates the following: OTHER RELEVANT INFORMATION Reference is made to our notice of inside information of 30 July 2025 (official registry number 2844) (the “ Buyback Commencement Communication ”), relating to the buyback programme of own shares (the “ Buyback Programme ”) approved by the Board of Directors of Banco Santander. Pursuant to article 5 of Regulation (EU) no. 596/2014 on Market Abuse of 16 April 2014, and articles 2.2 and 2.3 of Commission Delegated Regulation (EU) 2016/1052, of 8 March 2016, the Bank informs of the transactions carried out over its own shares between 11 and 17 December 2025 (both inclusive). The cash amount of the shares purchased to 17 December 2025 as a result of the execution of the Buyback Programme amounts to 1,624,325,614 Euros, which represents approximately 95.6% of the maximum investment amount of the Buyback Programme. The programme was announced together with its other characteristics through the Buyback Commencement Communication. With these purchases, the Bank has repurchased approximately 15.2% of its outstanding shares as of 2021. Date Security Transaction Trading venue Number of shares Weighted average price (€) 11/12/ 2025 SAN Purchase XMAD 2,003,558 9.7057 11/12/ 2025 SAN Purchase CEUX 93,026 9.6898 11/12/ 2025 SAN Purchase TQEX 36,972 9.7053 11/12/ 2025 SAN Purchase AQEU 66,444 9.7323 12/12/ 2025 SAN Purchase XMAD 2,230,082 9.7911 12/12/ 2025 SAN Purchase CEUX 39,773 9.8545 12/12/ 2025 SAN Purchase TQEX 13,508 9.8480 12/12/ 2025 SAN Purchase AQEU 16,637 9.8488 15/12/ 2025 SAN Purchase XMAD 2,046,211 9.8160 15/12/ 2025 SAN Purchase CEUX 203,269 9.8132 15/12/ 2025 SAN Purchase TQEX 50,025 9.8129 15/12/ 2025 SAN Purchase AQEU 100,495 9.8132 16/12/ 2025 SAN Purchase XMAD 2,000,000 9.9051 16/12/ 2025 SAN Purchase CEUX 330,992 9.9014 16/12/ 2025 SAN Purchase TQEX 89,964 9.8889 16/12/ 2025 SAN Purchase AQEU 179,044 9.8936 17/12/ 2025 SAN Purchase XMAD 2,044,028 9.9115 17/12/ 2025 SAN Purchase CEUX 335,134 9.9115 17/12/ 2025 SAN Purchase TQEX 83,432 9.9181 17/12/ 2025 SAN Purchase AQEU 137,406 9.9074 TOTAL 12,100,000 Issuer name : Banco Santander, S.A. - LEI 5493006QMFDDMYWIAM13 Reference of the financial instrument : ordinary shares - Code ISIN ES0113900J37 Detailed information of the transactions carried out within the referred period is attached as Annex I. Boadilla del Monte (Madrid), 18 December 2025 1 ANNEX I Detailed information on each of the transactions carried out within the context of the Buy-back Programme between 11/12/2025 and 17/12/2025 (both inclusive) (https://www.santander.com/content/dam/santander-com/es/documentos/cumplimiento/do-anexo-i-11-a-17-12-2025.pdf) 2 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: December 18, 2025 By: /s/ Pedro de Mingo Kaminouchi Name: Pedro de Mingo Kaminouchi Title: Head of Corporate Compliance

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