[6-K] Banco Santander (Brasil) S.A. Current Report (Foreign Issuer)

Rhea-AI Filing Summary

Banco Santander (Brasil) S.A. resubmitted the remote voting ballot for its Extraordinary General Meeting to add a field for shareholder views on establishing a Fiscal Council, with no changes to the agenda. Votes already submitted remain valid under CVM Resolution 81/22.

The deadline to send new remote voting instructions is November 25, 2025, and the meeting is scheduled for November 28, 2025 at 3:30 p.m. The company recommends using the same service provider if submitting a new ballot to avoid conflicting instructions.

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 November, 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 Paulo, SP 04543-011
Federative Republic of Brazil

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F: Form 20-F ___X___ Form 40-F _______

 Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): 

Yes _______ No ___X____

 Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): 

Yes _______ No ___X____

 Indicate by check mark whether by furnishing the information contained in this Form, the Registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934: 

Yes _______ No ___X____

 If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b):  N/A

[Free English Translation]

BANCO SANTANDER (BRASIL) S.A.

Public-held Company with Authorized Capital

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

Company Registry No. 35.300.332.067

NOTICE TO THE MARKET

BANCO SANTANDER (BRASIL) S.A. (“Santander Brasil” or “Company”), in compliance with the provisions of article 26, §3, item II of CVM Resolution No. 81, of March 29, 2022, as amended (“CVM Resolution 81/22”), to adapt to the regulations, hereby informs its shareholders and the market in general that it has resubmitted, on this date, the Remote Voting Ballot for the Extraordinary General Meeting of the Company, to be held on November 28, 2025, at 3:30 p.m., to include a field for shareholders to express their views on the establishment of the Fiscal Council, without any changes to the matters on the agenda.

The Company clarifies that votes already submitted will remain valid, in accordance with article 26, §5 of CVM Resolution 81/22, and that the deadline for shareholders to submit new voting instructions, if they wish, is November 25, 2025 (inclusive). To avoid conflicting voting instructions, the Company recommends that shareholders submit any new remote voting ballot to the same service provider previously used.

São Paulo, November 03, 2025.

Gustavo Alejo Viviani

Investor Relations Officer

BANCO SANTANDER (BRASIL) S.A.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereto duly authorized.

Date: November 3, 2025

Banco Santander (Brasil) S.A.
By:	/S/ Reginaldo Antonio Ribeiro
	Reginaldo Antonio Ribeiro Officer without specific designation

By:	/S/ Gustavo Alejo Viviani
	Gustavo Alejo Viviani Vice - President Executive Officer

FAQ

What did BSBR change in the EGM voting process?

The company resubmitted the remote voting ballot to include a field for shareholders to express views on establishing a Fiscal Council, without altering the agenda.

When is Banco Santander (Brasil) S.A.’s EGM?

The Extraordinary General Meeting is on November 28, 2025 at 3:30 p.m.

What is the deadline to submit new remote voting instructions for BSBR?

The deadline is November 25, 2025 (inclusive).

Do previously submitted votes remain valid for BSBR’s EGM?

Yes. Votes already submitted remain valid pursuant to CVM Resolution 81/22.

Did BSBR change the EGM agenda?

No. The company stated there are no changes to the matters on the agenda.

Why was the ballot resubmitted by BSBR?

To comply with CVM Resolution 81/22 by adding a field for shareholders’ views on the Fiscal Council.

How can shareholders avoid conflicting voting instructions?

The company recommends submitting any new ballot to the same service provider previously used.