Banco Santander (NYSE: SAN) details August–September 2025 share buybacks

Rhea-AI Filing Summary

Banco Santander, S.A. reports an update on its share buyback programme, detailing purchases of its own shares between 28 August and 3 September 2025. The bank states that the cash amount invested in shares purchased up to 3 September 2025 totals 341,234,794 Euros, which is approximately 20.1% of the maximum investment amount of the programme. It adds that, with these purchases, it has repurchased approximately 14.4% of its outstanding shares as of 2021. During the 28 August to 3 September 2025 period, the bank bought a total of 5,373,435 shares across several trading venues at weighted average prices slightly above 8 Euros per share.

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 September, 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 September 4, 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 28 August and 3 September 2025 (both inclusive).

The cash amount of the shares purchased to 3 September 2025 as a result of the execution of the Buyback Programme amounts to 341,234,794 Euros, which represents approximately 20.1% 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 14.4% of its outstanding shares as of 2021.

Date	Security	Transaction	Trading venue	Number of shares	Weighted average price (€)
28/08/2025	SAN	Purchase	XMAD	361,710	8.2110
28/08/2025	SAN	Purchase	CEUX	27,941	8.2083
28/08/2025	SAN	Purchase	TQEX	18,829	8.1820
28/08/2025	SAN	Purchase	AQEU	14,955	8.1776
29/08/2025	SAN	Purchase	XMAD	1,050,115	8.1150
29/08/2025	SAN	Purchase	CEUX	136,427	8.0983
29/08/2025	SAN	Purchase	TQEX	43,516	8.1219
29/08/2025	SAN	Purchase	AQEU	19,942	8.0981
01/09/2025	SAN	Purchase	XMAD	510,578	8.1539
01/09/2025	SAN	Purchase	CEUX	100,488	8.1493
01/09/2025	SAN	Purchase	TQEX	38,750	8.1496
01/09/2025	SAN	Purchase	AQEU	50,184	8.1524
02/09/2025	SAN	Purchase	XMAD	1,230,000	8.0827
02/09/2025	SAN	Purchase	CEUX	454,077	8.0379
02/09/2025	SAN	Purchase	TQEX	125,179	8.0454
02/09/2025	SAN	Purchase	AQEU	190,744	8.0453
03/09/2025	SAN	Purchase	XMAD	833,728	8.0462
03/09/2025	SAN	Purchase	CEUX	84,308	8.0558
03/09/2025	SAN	Purchase	TQEX	34,792	8.0369
03/09/2025	SAN	Purchase	AQEU	47,172	8.0623
			TOTAL	5,373,435

1 

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), 4 September 2025

2 

ANNEX I

Detailed information on each of the transactions carried out within the context of the Buy-back Programme between 28/08/2025 and 03/09/2025 (both inclusive)

(https://www.santander.com/content/dam/santander-com/es/documentos/cumplimiento/do-anexo-i-28-ago-a-03-09-2025.pdf)

3 

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:	September 4, 2025		By:	/s/ Pedro de Mingo Kaminouchi
				Name:	Pedro de Mingo Kaminouchi
				Title:	Head of Corporate Compliance

September 4, 2025

FAQ

What did Banco Santander (SAN) disclose in this Form 6-K?

Banco Santander disclosed an update on its share buyback programme, including the value and volume of own shares it repurchased between 28 August and 3 September 2025.

How much has Banco Santander invested in its share buyback so far?

The bank reports that the cash amount of shares purchased up to 3 September 2025 under the buyback programme is 341,234,794 Euros, which is about 20.1% of the programme’s maximum investment amount.

What portion of Banco Santander’s share capital has been repurchased?

Banco Santander states that, with the reported purchases, it has repurchased approximately 14.4% of its outstanding shares as of 2021.

Over what period does this Banco Santander buyback update apply?

The update covers transactions in Banco Santander’s own shares carried out between 28 August and 3 September 2025, both dates inclusive.

How many Banco Santander shares were repurchased in this period?

During the 28 August to 3 September 2025 period, the bank repurchased a total of 5,373,435 shares across several trading venues.

At what prices did Banco Santander repurchase its shares?

The filing lists weighted average purchase prices around 8.0–8.2 Euros per share on different trading venues, with detailed figures provided for each day and venue.

Where can investors find the detailed list of Banco Santander buyback trades?

The bank refers investors to Annex I, accessible via a provided link, which contains detailed information on each transaction between 28 August and 3 September 2025.