Insider Ownership Filing for Celso Mateus De Queiroz

This filing details the initial ownership of securities by Celso Mateus De Queiroz, an officer of Banco Santander (Brasil) S.A. (BSBR). Mr. Queiroz reports direct ownership of 53,137 units of the security designated as UNIT - SANB11. The reporting date for this transaction is March 20, 2026. The filing was made in accordance with SEC requirements for reporting beneficial ownership by insiders.