Shareholders and Investors Financial and economic information Quarterly Results Quarterly Results Year 2021 QUARTERLY RESULTS 3Q 2021 27-10-2021 9M'21 Financial Report 4,6 MB 27-10-2021 9M'21 Earnings Presentation 2,1 MB 27-10-2021 9M'21 Series 768,0 KB 9M'21 Press release Audiocast 2Q 2021 1Q 2021 MORE INFORMATION Spain United Kingdom Portugal Poland United States Mexico Brazil Chile Argentina Digital Consumer Bank USEFUL LINKS LEGAL LINKS OF INTEREST © Banco Santander S.A. All rights reserved. Corporate Headquarters: CGS Av. Cantabria s/n 28660 Boadilla del Monte, Madrid (Spain) COOKIE CONFIGURATION For Banco Santander, it is important to adapt to your tastes and preferences. To this end, we use proprietary and third-party cookies to differentiate your experience from that of other users, for analytical purposes and to deliver personalised advertising based on a profile drawn from your browsing habits. You can configure cookies or accept all of them. This banner will remain active until you run one of the two options. For further information, please consult our Cookie Policy. CONFIGURE COOKIES It only takes you a few seconds ACCEPT ALL COOKIES

Shareholders and Investors General Information Offer to acquire outstanding shares and ADSs of Banco Santander Mexico (November 2021) Offer to acquire outstanding shares and ADSs of Banco Santander Mexico (November 2021) The main documentation in connection with the offer conducted in the United States can be found below, while that in connection with the Mexican offer is accessible through here. Relevant Fact (PDF 137.3 Kb) US Offer to Purchase (PDF 695.8 Kb) Share Letter of Transmittal (PDF 2.5 Mb) ADS Letter of Transmittal (PDF 576.6 Kb) US form of acceptance (PDF 433.2 Kb) Letter to Brokers (PDF 111.6 Kb) Letter to Clients (PDF 119.8 Kb) Recommendation of the Board of Directors of Santander Mexico in connection with the tender offer (PDF 682 Kb) USEFUL LINKS LEGAL LINKS OF INTEREST © Banco Santander S.A. All rights reserved. Corporate Headquarters: CGS Av. Cantabria s/n 28660 Boadilla del Monte, Madrid (Spain) COOKIE CONFIGURATION For Banco Santander, it is important to adapt to your tastes and preferences. To this end, we use proprietary and third-party cookies to differentiate your experience from that of other users, for analytical purposes and to deliver personalised advertising based on a profile drawn from your browsing habits. You can configure cookies or accept all of them. This banner will remain active until you run one of the two options. For further information, please consult our Cookie Policy. CONFIGURE COOKIES It only takes you a few seconds ACCEPT ALL COOKIES