UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 _____________________________________________ FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August, 2025 _____________________________________________ Commission File Number: 001-34476 BANCO SANTANDER (BRASIL) S.A. (Exact name of registrant as specified in its charter) Avenida Presidente Juscelino Kubitschek, 2041 and 2235 Bloco A – Vila Olimpia São ...