Banco Santander S.A.

Transaction in Own Shares • Nov 13, 2025

National Storage Mechanism | Additional information

RNS Number : 4514H

Banco Santander S.A.

13 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 6 and 12 November 2025 (both inclusive).

The cash amount of the shares purchased to 12 November 2025 as a result of the execution of the Buyback Programme amounts to 1,146,169,104 Euros, which represents approximately 67.4% 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 (€)
06/11/2025	SAN	Purchase	XMAD	1,757,626	8.9380
06/11/2025	SAN	Purchase	CEUX	88,059	8.9354
06/11/2025	SAN	Purchase	TQEX	21,260	8.9360
06/11/2025	SAN	Purchase	AQEU	33,055	8.9406
07/11/2025	SAN	Purchase	XMAD	1,200,000	8.9007
07/11/2025	SAN	Purchase	CEUX	394,607	8.9077
07/11/2025	SAN	Purchase	TQEX	144,934	8.9049
07/11/2025	SAN	Purchase	AQEU	260,459	8.8983
10/11/2025	SAN	Purchase	XMAD	1,592,859	9.0771
10/11/2025	SAN	Purchase	CEUX	244,068	9.0719
10/11/2025	SAN	Purchase	TQEX	61,324	9.0514
10/11/2025	SAN	Purchase	AQEU	101,749	9.0399
11/11/2025	SAN	Purchase	XMAD	1,450,000	9.2336
11/11/2025	SAN	Purchase	CEUX	326,672	9.2206
11/11/2025	SAN	Purchase	TQEX	91,892	9.2121
11/11/2025	SAN	Purchase	AQEU	131,436	9.2172
12/11/2025	SAN	Purchase	XMAD	1,865,171	9.5153
12/11/2025	SAN	Purchase	CEUX	81,004	9.4919
12/11/2025	SAN	Purchase	TQEX	14,750	9.4897
12/11/2025	SAN	Purchase	AQEU	39,075	9.4586
			TOTAL	9,900,000

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), 13 November 2025

ANNEX I

Detailed information on each of the transactions carried out within the context of the Buy-back Programme between 06/11/2025 and 12/11/2025 (both inclusive)

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