[6-K] Banco Santander, S.A. Current Report (Foreign Issuer)

Rhea-AI Filing Summary

Banco Santander reported progress on its ongoing share buyback programme. As of 12 November 2025, purchases under the programme total €1,146,169,104, representing approximately 67.4% of the programme’s maximum investment amount.

Between 6 and 12 November 2025, the bank repurchased a total of 9,900,000 shares across venues including XMAD, CEUX, TQEX and AQEU, at disclosed weighted average prices per trade date. With these purchases, the bank states it has repurchased approximately 15% of its outstanding shares as of 2021. The securities are Banco Santander ordinary shares (ISIN ES0113900J37).

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 November, 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 November 13, 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 6 and 12 November 2025 (both inclusive).

The cash amount of the shares purchased to 12 November 2025 as a result of the execution of the Buyback Programme amounts to 1,146,169,104 Euros, which represents approximately 67.4% 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% of its outstanding shares as of 2021.

Date	Security	Transaction	Trading venue	Number of shares	Weighted average price (€)
06/11/2025	SAN	Purchase	XMAD	1,757,626	8.9380
06/11/2025	SAN	Purchase	CEUX	88,059	8.9354
06/11/2025	SAN	Purchase	TQEX	21,260	8.9360
06/11/2025	SAN	Purchase	AQEU	33,055	8.9406
07/11/2025	SAN	Purchase	XMAD	1,200,000	8.9007
07/11/2025	SAN	Purchase	CEUX	394,607	8.9077
07/11/2025	SAN	Purchase	TQEX	144,934	8.9049
07/11/2025	SAN	Purchase	AQEU	260,459	8.8983
10/11/2025	SAN	Purchase	XMAD	1,592,859	9.0771
10/11/2025	SAN	Purchase	CEUX	244,068	9.0719
10/11/2025	SAN	Purchase	TQEX	61,324	9.0514
10/11/2025	SAN	Purchase	AQEU	101,749	9.0399
11/11/2025	SAN	Purchase	XMAD	1,450,000	9.2336
11/11/2025	SAN	Purchase	CEUX	326,672	9.2206
11/11/2025	SAN	Purchase	TQEX	91,892	9.2121
11/11/2025	SAN	Purchase	AQEU	131,436	9.2172
12/11/2025	SAN	Purchase	XMAD	1,865,171	9.5153
12/11/2025	SAN	Purchase	CEUX	81,004	9.4919
12/11/2025	SAN	Purchase	TQEX	14,750	9.4897
12/11/2025	SAN	Purchase	AQEU	39,075	9.4586
			TOTAL	9,900,000

 

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), 13 November 2025

 

ANNEX I

Detailed information on each of the transactions carried out within the context of the Buy-back Programme between 06/11/2025 and 12/11/2025 (both inclusive)

(https://www.santander.com/content/dam/santander-com/es/documentos/cumplimiento/do-anexo-i-06-a-12-11-2025.pdf)

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:	November 13, 2025	By:	/s/ Pedro de Mingo Kaminouchi
			Name:	Pedro de Mingo Kaminouchi
			Title:	Head of Corporate Compliance

FAQ

What did Banco Santander (SAN) announce in its latest 6-K?

It reported progress on its share buyback programme, with purchases totaling €1,146,169,104 as of 12 November 2025.

How much of the buyback programme is completed for SAN?

The purchased amount represents approximately 67.4% of the programme’s maximum investment amount.

How many SAN shares were repurchased from 6–12 November 2025?

A total of 9,900,000 shares were repurchased across XMAD, CEUX, TQEX, and AQEU.

What cumulative impact has the buyback had on SAN’s share count?

With these purchases, Banco Santander has repurchased approximately 15% of its outstanding shares as of 2021.

What securities are involved in the SAN buyback?

Ordinary shares of Banco Santander, S.A., ISIN ES0113900J37.

Which trading venues were used for recent SAN buybacks?

Transactions occurred on XMAD, CEUX, TQEX, and AQEU.