Banco Santander buyback reaches about 80.8% of cap

By October 21, cash amount of shares purchased under the programme represented approximately 80.8% of its maximum investment amount.

Rhea-AI Filing Summary

Banco Santander, S.A. repurchased 19,100,000 of its own shares from October 15 through October 21, 2026, under its buyback programme. By October 21, 2026, the cash amount of shares purchased under the programme was €1,474,221,281, representing approximately 80.8% of the programme’s maximum investment amount. The bank also stated that it had repurchased approximately 18.6% of its outstanding shares as of 2021.

Key Figures

Shares repurchased: 19,100,000 shares Cash amount of shares purchased: €1,474,221,281 Programme maximum investment amount represented: Approximately 80.8% +1 more

4 metrics

Shares repurchased 19,100,000 shares October 15 through October 21, 2026

Cash amount of shares purchased €1,474,221,281 Through October 21, 2026

Programme maximum investment amount represented Approximately 80.8% Cash amount of shares purchased through October 21, 2026

Repurchased share of outstanding shares Approximately 18.6% Outstanding shares as of 2021

Key Terms

Buyback Programme, Weighted average price, inside information

3 terms

Buyback Programme financial

"relating to the buyback programme of own shares"

Weighted average price financial

"Weighted average price (€)"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

inside information regulatory

"notice of inside information of 10 August 2026"

Information not available to the public that, if known, would likely cause a company’s stock or bonds to rise or fall—for example, undisclosed earnings, deals, product results, or management plans. It matters because trading on that information gives an unfair advantage, can distort market prices, and is typically illegal or subject to strict rules, so investors watch for proper disclosure and compliance to protect fair, transparent markets.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many shares did Banco Santander (SAN) repurchase from October 15 through October 21, 2026?

Banco Santander repurchased 19,100,000 of its own shares during that period. Purchases were reported for October 15, 16, 19, 20 and 21.

How much had Banco Santander (SAN) spent on its buyback by October 21, 2026?

The cash amount of shares purchased through October 21, 2026 was €1,474,221,281, representing approximately 80.8% of the buyback programme’s maximum investment amount.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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

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Available on EDGAR 10/22/2026 - 06:10 AM EDT Accepted by SEC EDGAR 10/22/2026 - 06:10 AM EDT Learn about SEC filing dates

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 October, 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 October 22, 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 10 August 2026 (official registry number 3336) (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 15 and 21 October (both inclusive).

The cash amount of the shares purchased to 21 October 2026 as a result of the execution of the Buyback Programme amounts to 1,474,221,281 Euros, which represents approximately 80.8% 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 18.6% of its outstanding shares as of 2021.

Date	Security	Transaction	Trading venue	Number of shares	Weighted average price (€)
15/10/2026	SAN	Purchase	XMAD	2,100,000	11.9888
15/10/2026	SAN	Purchase	CEUX	296,874	11.9951
15/10/2026	SAN	Purchase	TQEX	41,993	11.9717
15/10/2026	SAN	Purchase	AQEU	161,133	11.9975
16/10/2026	SAN	Purchase	XMAD	500,000	12.0517
19/10/2026	SAN	Purchase	XMAD	4,000,000	11.7909
19/10/2026	SAN	Purchase	CEUX	1,127,932	11.7768
19/10/2026	SAN	Purchase	TQEX	336,267	11.8032
19/10/2026	SAN	Purchase	AQEU	535,801	11.7806
20/10/2026	SAN	Purchase	XMAD	4,200,000	11.7270
20/10/2026	SAN	Purchase	CEUX	1,769,587	11.6860
20/10/2026	SAN	Purchase	TQEX	342,357	11.6666
20/10/2026	SAN	Purchase	AQEU	688,056	11.6942
21/10/2026	SAN	Purchase	XMAD	2,664,002	11.8742
21/10/2026	SAN	Purchase	CEUX	147,445	11.7673
21/10/2026	SAN	Purchase	TQEX	68,651	11.7577
21/10/2026	SAN	Purchase	AQEU	119,902	11.7666
			TOTAL	19,100,000

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), 22 October 2026

1 

 

ANNEX I

Detailed information on each of the transactions carried out within the context of the Buy-back Programme between 15/10/2026 and 21/10/2026 (both inclusive)

(https://www.santander.com/content/dam/santander-com/es/documentos/cumplimiento/do-anexo-i-15-a-21-octubre-2026-es.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:	October 22, 2026		By:	/s/ Pedro de Mingo Kaminouchi
				Name:	Pedro de Mingo Kaminouchi
				Title:	Head of Corporate Compliance