Banco Santander, S.A. Share Buyback Program Update

Banco Santander, S.A. announced an update on its share buyback program. Between October 1 and October 7, 2026, the company purchased shares totaling 1,175,196,981 Euros. This amount represents approximately 64.4% of the maximum investment allocated for the program. As a result of these transactions, Banco Santander has repurchased approximately 18.5% of its outstanding shares as of 2021. The filing includes detailed transaction information for the specified period, with purchases executed on various trading venues including XMAD, CEUX, TQEX, and AQEU.