# EDGAR Filing Document

**Accession Number:** 0001132597
**File Stem:** 0001132597-26-000070
**Filing Date:** 2026-3
**Character Count:** 8244
**Document Hash:** 2728559e08aa1a835e2624c37b37a496
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001132597-26-000070.hdr.sgml**: 20260303

**ACCESSION NUMBER**: 0001132597-26-000070

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 3

**CONFORMED PERIOD OF REPORT**: 20260303

**FILED AS OF DATE**: 20260303

**DATE AS OF CHANGE**: 20260303

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Itau Unibanco Holding S.A.
- **CENTRAL INDEX KEY:** 0001132597
- **STANDARD INDUSTRIAL CLASSIFICATION:** STATE COMMERCIAL BANKS [6022]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 000000000
- **STATE OF INCORPORATION:** D5
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-15276
- **FILM NUMBER:** 26715194

**BUSINESS ADDRESS:**
- **STREET 1:** PC. ALFREDO EGYDIO DE SOUZA ARANHA, 100
- **STREET 2:** TORRE AE, 3 ANDAR, CEP 04344-902
- **CITY:** SAO PAULO
- **STATE:** D5
- **ZIP:** 00000
- **BUSINESS PHONE:** 55-11-5019-1723

**MAIL ADDRESS:**
- **STREET 1:** PC. ALFREDO EGYDIO DE SOUZA ARANHA, 100
- **STREET 2:** TORRE AE, 3 ANDAR, CEP 04344-902
- **CITY:** SAO PAULO
- **STATE:** D5
- **ZIP:** 00000

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Itau Unibanco Banco Multiplo S.A.
- **DATE OF NAME CHANGE:** 20090226

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BANCO ITAU HOLDING FINANCEIRA S A
- **DATE OF NAME CHANGE:** 20030319

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BANCO ITAU SA
- **DATE OF NAME CHANGE:** 20010117

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| | |
|:---|:---|
| **UNITED STATES** | **UNITED STATES** |
| **SECURITIES AND EXCHANGE COMMISSION** | **SECURITIES AND EXCHANGE COMMISSION** |
| **Washington, D.C. 20549** | **Washington, D.C. 20549** |
| **FORM 6-K** | **FORM 6-K** |
| &nbsp;&nbsp;**Report of Foreign Issuer<br>Pursuant to Rule 13a-16 or 15d-16<br>of the Securities Exchange Act of 1934** | &nbsp;&nbsp;**Report of Foreign Issuer<br>Pursuant to Rule 13a-16 or 15d-16<br>of the Securities Exchange Act of 1934** |
| &nbsp;&nbsp;**Report of Foreign Issuer<br>Pursuant to Rule 13a-16 or 15d-16<br>of the Securities Exchange Act of 1934** | &nbsp;&nbsp;**Report of Foreign Issuer<br>Pursuant to Rule 13a-16 or 15d-16<br>of the Securities Exchange Act of 1934** |
| &nbsp;&nbsp;**Report of Foreign Issuer<br>Pursuant to Rule 13a-16 or 15d-16<br>of the Securities Exchange Act of 1934** | &nbsp;&nbsp;**Report of Foreign Issuer<br>Pursuant to Rule 13a-16 or 15d-16<br>of the Securities Exchange Act of 1934** |
| **For the month of March, 2026** | **For the month of March, 2026** |
| **Comission File Number: 001-15276** | **Comission File Number: 001-15276** |
| **Itaú Unibanco Holding S.A.** | **Itaú Unibanco Holding S.A.** |
| (Exact name of registrant as specified in its charter) | (Exact name of registrant as specified in its charter) |
| **Itaú Unibanco Holding S.A.** | **Itaú Unibanco Holding S.A.** |
| (Translation of Registrant's Name into English) | (Translation of Registrant's Name into English) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Praça Alfredo Egydio de Souza Aranha, 100 - Torre Conceição** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Praça Alfredo Egydio de Souza Aranha, 100 - Torre Conceição** |
| &nbsp;&nbsp;&nbsp;**CEP 04344-902 São Paulo, SP, Brazil<br>(Address of principal executive office)** | &nbsp;&nbsp;&nbsp;**CEP 04344-902 São Paulo, SP, Brazil<br>(Address of principal executive office)** |
| &nbsp;&nbsp;&nbsp;**CEP 04344-902 São Paulo, SP, Brazil<br>(Address of principal executive office)** | &nbsp;&nbsp;&nbsp;**CEP 04344-902 São Paulo, SP, Brazil<br>(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. | 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 ☒ | &nbsp;&nbsp;&nbsp;&nbsp; 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): | 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 ☐ | &nbsp;&nbsp;&nbsp;&nbsp;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): | 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 ☐ | &nbsp;&nbsp;&nbsp;&nbsp;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. | 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 ☐ | &nbsp;&nbsp;&nbsp;&nbsp;No ☒ |
| If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): | If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): |
| 82– __________________ | 82– __________________ |

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**EXHIBIT INDEX**

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| | |
|:---|:---|
| **99.1** | <u>[ITAÚ UNIBANCO - Notice to Shareholders - Payment of fractions of shares resulting from the bonus share](avisoaosacionistasleilo_.htm)</u> |

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| |
|:---|
| &nbsp;&nbsp;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. |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Date: March 03, 2026. |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Itaú Unibanco Holding S.A.**<br>By: /s/ Gustavo Lopes Rodrigues<br>Name: Gustavo Lopes Rodrigues<br>Title: Investor Relations Officer. |

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## Exhibit 99.1

![](avisoaosacionistasleilo_001.jpg)

&nbsp;&nbsp;&nbsp;&nbsp;Notice to Stockholders Itaú Unibanco Holding S.A. ("Company") announces to its stockholders, by supplementing the Material Fact disclosed on December 18, 2025, that the share fractions arising from the share bonus have been grouped in whole numbers and sold on B3 S.A. – Brasil, Bolsa, Balcão ("B3") at the auction held on February 24, 2026. At this auction, 198,581 book-entry shares with no par value were sold, of which 55,921 common shares and 142,660 preferred shares, with the net amounts of BRL 44.8730180388 for each common share and BRL 48.1301186067 for each preferred share. These amounts will be available for 10 years1 to stockholders without up-to-date registration information from the date of payment to stockholders with up-to-date registration information. The proceeds of these fractions will be made available on March 10, 2026 to stockholders entitled to receive them, as follows: a) for stockholders registered in the Company's books whose registration information is up-to- date, proceeds will be deposited directly by Itaú Corretora de Valores S.A., the institution responsible for the Company's share bookkeeping, to the current account at the Financial Institution indicated in the stockholder's registration information. Any stockholders whose registration information is not updated should do so through the channels below: (i) App Íon (for shareholders who are Itaú account holders) – by following the route: My account > Update your registration information, and (ii) brick-and-mortar branch: hold individual taxpayer's registry (CPF), identity card (RG), proof of residence and proof of bank domicile; and b) for other stockholders, payment will be made directly to B3, who will subsequently transfer these amounts to the stockholders included in their registrations, through their Custody Agents. São Paulo (SP), March 03, 2026. Gustavo Lopes Rodrigues Investor Relations Officer 1 According to article 205 of the Civil Code.

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