Itau Unibanco Holding S.A.

Foreign Filer Report • Dec 18, 2025

6-K 1 a6-k_itubx18122025.htm 6-K Document created using Wdesk Copyright 2025 Workiva Document

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K
Report of Foreign Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934
For the month of December, 2025
Comission File Number: 001-15276
Itaú Unibanco Holding S.A.
(Exact name of registrant as specified in its charter)
Itaú Unibanco Holding S.A.
(Translation of Registrant’s Name into English)
Praça Alfredo Egydio de Souza Aranha, 100 - Torre Conceição
CEP 04344-902 São Paulo, SP, Brazil (Address of principal executive office)
Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.
Form 20-F ☒	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 ☒
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 ☒
Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.
Yes ☐	No ☒
If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b):
82– ______

EXHIBIT INDEX

99.1 ITAÚ UNIBANCO - SUMMARIZED MINUTES OF THE MEETING OF THE BOARD OF DIRECTORS OF DECEMBER 18, 2025

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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, thereunto duly authorized.
Date: December 18, 2025.
Itaú Unibanco Holding S.A. By: /s/ Gustavo Lopes Rodrigues Name: Gustavo Lopes Rodrigues Title: Investor Relations Officer.