Initial Statement of Beneficial Ownership

This filing is an Initial Statement of Beneficial Ownership for Banco Santander (Brasil) S.A. (BSBR). The reporting owner, Leonardo Augusto de Andrade Barbosa, who holds the title of Officer w/o Specific Desig., reported direct ownership of 2256 units of SANB11 following a transaction. The filing was made on March 18, 2026.