| UNITED STATES | |||||||||||
| 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 November, 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
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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: November 27, 2025. | ||||||||||||||
Itaú Unibanco Holding S.A. By: /s/ Gustavo Lopes Rodrigues Name: Gustavo Lopes Rodrigues Title: Investor Relations Officer. | ||||||||||||||