SEC Form 6-K filed by Banco Santander Brasil SA

[Free English Translation]

BANCO SANTANDER (BRASIL) S.A.

Public Company with Authorized Capital

Corporate Taxpayer´s Registry No. 90.400.888/0001-42

Company Registry No. 35.300.332.067

Minutes of the Board of Directors Meeting held on October 10, 2025

DATE, TIME AND PLACE: On October 10, 2025, at 5 p.m., by conference call, the Board of Directors of Banco Santander (Brasil) S.A. (“Company” or “Santander”) have met, with the attendance of all of its members.

CALL NOTICE AND ATTENDANCE: The call was waived in view of the attendance of all members of the Board of Directors.

MEETING BOARD: Deborah Stern Vieitas, Chairman. Bruno Carneiro, Secretary.

AGENDA: To approve the proposal for declaration and payment of Interest on Company’s Equity, pursuant to the Company’s Executive Board proposal.

RESOLUTIONS: The proposal of the Company's Board of Executive Officers was presented to the Board of Directors, as per the meeting held on this date, ad referendum of the Ordinary General Meeting of the shareholders to be held until April 30, 2026, for the declaration and payment of Interest on Company’s Equity, pursuant to articles 17, item XVIII and 37, second paragraph, of the Company's Bylaws in the gross amount of R$ 2,000,000,000.00 (two billion Brazilian reais), corresponding to R$ 0.25517791545 per common share, R$ 0.28069570699 per preferred share and R$ 0.53587362244 per Unit, which, after the deduction of the amount related to the Income Tax Withheld at Source (“IRRF”), pursuant to the laws in force, result the net amount corresponding to R$ 1,700,000,000.00 (one billion and seven hundred million Brazilian reais), corresponding to R$ 0.21690122813 per common share, R$ 0.23859135094 per preferred share and R$ 0.45549257907 per Unit, except for immune and/or exempt shareholders.

It remained formalized that (i) the shareholders registered on the Company’s records by the end of October 21, 2025 (including) will be entitled to the Interest on Company’s Equity hereby approved. Therefore, as of October 22, 2025 (including), the Company’s shares shall be traded “Ex-Interest on Company’s Equity”; (ii) the Interest on Company’s Equity hereby approved (a) shall be fully considered within the amount of the mandatory dividends to be distributed by the Company for the year 2025; and (b) shall be paid on November 07, 2025, with no compensation of monetary restatement; (iii) the amount of Interest on Company’s Equity proposed in the base-year fits the limits settled in the tax legislation; (iv) the Board of Directors authorized the Executive Board to take the actions necessary for the release of the proper “Notice to Shareholders”, to disclose to market the resolution just taken; and (v) the support documents of the mentioned declaration and payment of Interest on Company’s Equity shall be kept filed at the Company’s headquarters.

ADJOURNMENT: There being no further matters to be resolved, the Meeting was finalized, and these minutes have been prepared and send to be electronically signed by the attendees. Board: Deborah Stern Vieitas, Chairwoman. Bruno Carneiro, Secretary. Signatures: Mrs. Deborah Stern Vieitas – Chairwoman; Mr. Javier Maldonado Trinchant – Vice Chairman; and

1/2

[Free English Translation]

Messrs. Cristiana Almeida Pipponzi; Cristina San Jose Brosa; Deborah Patricia Wright, Ede Ilson Viani, José de Paiva Ferreira, Nitin Prabhu, Mario Roberto Opice Leão, Pedro Augusto de Melo and Vanessa de Souza Lobato Barbosa – Directors. São Paulo, October 10, 2025.

I certify that this is a true transcript of the minutes recorded in the Minutes of the Board of Directors Meetings Book of the Company.

Bruno Carneiro

Secretary

2/2