Buyback programme: transactions 28May-3June

Summary by AI ^BETAClose X

Banco Santander has provided an update on its share buyback programme, reporting that as of June 3, 2026, it has purchased shares for a total of €2,965,628,002, which represents approximately 59% of the maximum investment amount. These purchases have resulted in the repurchase of roughly 17% of the bank's outstanding shares as of 2021. The transactions covered the period from May 28 to June 3, 2026, with shares acquired on various trading venues at weighted average prices around €10.70.

Disclaimer*

Banco Santander S.A.

04 June 2026

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 28 May and 3 June (both inclusive).

The cash amount of the shares purchased to 3 June 2026 as a result of the execution of the Buyback Programme amounts to 2,965,628,002 Euros, which represents approximately 59% 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 17% of its outstanding shares as of 2021.

Date	Security	Transaction	Trading venue	Number of shares	Weighted average price (€)
28/05/2026	SAN	Purchase	XMAD	100,000	10.7039
29/05/2026	SAN	Purchase	XMAD	100,000	10.7750
01/06/2026	SAN	Purchase	XMAD	3,500,000	10.6539
01/06/2026	SAN	Purchase	CEUX	1,000,000	10.6560
02/06/2026	SAN	Purchase	XMAD	2,672,545	10.7196
02/06/2026	SAN	Purchase	CEUX	1,000,000	10.7169
03/06/2026	SAN	Purchase	XMAD	2,892,824	10.6722
03/06/2026	SAN	Purchase	CEUX	1,500,000	10.6682
			TOTAL	12,765,369

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 June 2026

ANNEX I

Detailed information on each of the transactions carried out within the context of the Buy-back Programme between 28/05/2026 and 03/06/2026 (both inclusive)

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