Banco Santander (NYSE: SAN) buyback reaches 47.8% of programme cap

Rhea-AI Filing Summary

Banco Santander reports further progress on its share buyback programme. By 25 March 2026, the bank had spent €2,404,144,244 repurchasing its own shares, equal to approximately 47.8% of the programme’s maximum investment amount. These buybacks mean the bank has repurchased about 16.6% of its outstanding shares as of 2021.

Between 19 and 25 March 2026, Banco Santander bought a total of 28,038,361 shares across several trading venues, at weighted average prices generally around €9 to €9.70 per share. Detailed, trade-by-trade information for this period is provided in an attached annex.

Form 6-K: How Foreign Companies Report to the SEC →

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 March, 2026

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 March 26, 2026

 

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 4 February 2026 (official registry number 3077) (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 19 and 25 March (both inclusive).

The cash amount of the shares purchased to 25 March 2026 as a result of the execution of the Buyback Programme amounts to 2,404,144,244 Euros, which represents approximately 47.8% 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 16.6% of its outstanding shares as of 2021.

Date	Security	Transaction	Trading venue	Number of shares	Weighted average price (€)
19/03/2026	SAN	Purchase	XMAD	7,804,948	9.3588
19/03/2026	SAN	Purchase	CEUX	2,405,880	9.3519
19/03/2026	SAN	Purchase	TQEX	417,223	9.3520
19/03/2026	SAN	Purchase	AQEU	337,374	9.3554
20/03/2026	SAN	Purchase	XMAD	5,000,000	9.4130
20/03/2026	SAN	Purchase	CEUX	1,500,000	9.4153
20/03/2026	SAN	Purchase	TQEX	250,000	9.4219
20/03/2026	SAN	Purchase	AQEU	250,000	9.4112
23/03/2026	SAN	Purchase	XMAD	2,153,538	9.0123
23/03/2026	SAN	Purchase	CEUX	533,434	9.0110
23/03/2026	SAN	Purchase	TQEX	82,932	9.0112
23/03/2026	SAN	Purchase	AQEU	86,308	9.0132
24/03/2026	SAN	Purchase	XMAD	3,718,334	9.4397
25/03/2026	SAN	Purchase	XMAD	3,498,390	9.7057
			TOTAL	28,038,361

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), 26 March 2026

ANNEX I

Detailed information on each of the transactions carried out within the context of the Buy-back Programme between 19/03/2026 and 25/03/2026 (both inclusive)

(https://www.santander.com/content/dam/santander-com/es/documentos/cumplimiento/do-anexo-i-19-a-25-marzo-2026-es.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:	March 26, 2026	By:	/s/ Pedro de Mingo Kaminouchi
			Name:	Pedro de Mingo Kaminouchi
			Title:	Head of Corporate Compliance

FAQ

What did Banco Santander (SAN) disclose in this March 2026 6-K?

Banco Santander disclosed an update on its ongoing share buyback programme. The bank detailed purchases of its own shares between 19 and 25 March 2026 and reported cumulative buybacks of €2,404,144,244, including volumes, prices and venues, with full trade detail available in an annex.

How much has Banco Santander (SAN) spent on share buybacks so far?

Banco Santander has spent €2,404,144,244 on share buybacks to 25 March 2026. This cumulative cash outlay represents approximately 47.8% of the maximum investment amount authorized for the ongoing buyback programme approved by the board of directors.

What portion of Banco Santander’s shares has the buyback retired?

The buyback programme has repurchased about 16.6% of Banco Santander’s outstanding shares as of 2021. This percentage reflects cumulative repurchases since the programme began, reducing the number of shares compared with the 2021 outstanding baseline.

How many Banco Santander (SAN) shares were repurchased between 19 and 25 March 2026?

Banco Santander repurchased 28,038,361 shares between 19 and 25 March 2026. These purchases occurred across multiple trading venues, including XMAD and other European platforms, at weighted average prices generally slightly above €9 per share during the period.

At what prices did Banco Santander (SAN) buy back its shares in this period?

During 19–25 March 2026, Banco Santander’s weighted average buyback prices ranged around €9.01–€9.71 per share. For example, trades on XMAD included averages such as €9.3588, €9.4130 and €9.7057, with full daily breakdowns provided in the annex.

What type of securities are being repurchased in Banco Santander’s buyback?

Banco Santander is repurchasing its ordinary shares under the buyback programme. The filing identifies the instrument as ordinary shares with ISIN code ES0113900J37, and all reported transactions during 19–25 March 2026 relate to this same class of equity.