Banco Santander S.A.

Transaction in Own Shares • Nov 20, 2025

National Storage Mechanism | Additional information

RNS Number : 3890I

Banco Santander S.A.

20 November 2025

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 13 and 19 November 2025 (both inclusive).

The cash amount of the shares purchased to 19 November 2025 as a result of the execution of the Buyback Programme amounts to 1,255,460,584 Euros, which represents approximately 73.9% 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 (€)
13/11/2025	SAN	Purchase	XMAD	1,210,000	9.5683
13/11/2025	SAN	Purchase	CEUX	384,318	9.5663
13/11/2025	SAN	Purchase	TQEX	97,452	9.5647
13/11/2025	SAN	Purchase	AQEU	208,230	9.5631
14/11/2025	SAN	Purchase	XMAD	1,390,000	9.3137
14/11/2025	SAN	Purchase	CEUX	415,569	9.3032
14/11/2025	SAN	Purchase	TQEX	129,355	9.2930
14/11/2025	SAN	Purchase	AQEU	265,076	9.2983
17/11/2025	SAN	Purchase	XMAD	900,319	9.1987
17/11/2025	SAN	Purchase	CEUX	870,171	9.1550
17/11/2025	SAN	Purchase	TQEX	193,249	9.1541
17/11/2025	SAN	Purchase	AQEU	336,261	9.1523
18/11/2025	SAN	Purchase	XMAD	2,460,000	8.8373
18/11/2025	SAN	Purchase	CEUX	699,160	8.8141
18/11/2025	SAN	Purchase	TQEX	206,359	8.8363
18/11/2025	SAN	Purchase	AQEU	234,481	8.8047
19/11/2025	SAN	Purchase	XMAD	1,866,805	8.8817
19/11/2025	SAN	Purchase	CEUX	58,527	8.7865
19/11/2025	SAN	Purchase	TQEX	29,986	8.7800
19/11/2025	SAN	Purchase	AQEU	44,682	8.7763
			TOTAL	12,000,000

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), 20 November 2025

ANNEX I

Detailed information on each of the transactions carried out within the context of the Buy-back Programme between 13/11/2025 and 19/11/2025 (both inclusive)

This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact [email protected] or visit www.rns.com.

RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our Privacy Policy.

END

POSURRARVVUAUAA