Banco Santander, S.A. Share Buyback Program Update

Banco Santander, S.A. reported on its share buyback program, detailing transactions conducted between August 27 and September 2, 2026. The total cash amount spent on repurchasing shares during this period was €305,890,700, representing approximately 16.8% of the program's maximum investment. This brings the total repurchased shares to approximately 18.1% of the outstanding shares as of 2021. The report includes a detailed breakdown of each transaction, including the date, security, transaction type (purchase), trading venue, number of shares, and weighted average price. The filing was made in compliance with EU Market Abuse Regulations and other relevant securities legislation.