6-K

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 December, 2023

Commission 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 Conceicao

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

ITAÚ UNIBANCO - NOTICE TO STOCKHOLDERS - PAYMENT OF EARNINGS - INTEREST ON CAPITAL (IOC)

SIGNATURES

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 5, 2023.

Itaú Unibanco Holding S.A.
By:	/s/ Renato Lulia Jacob
Name:	Renato Lulia Jacob
Title:	Group Head of Investor Relations and Market Intelligence
By:	/s/ Alexsandro Broedel
Name:	Alexsandro Broedel
Title:	Chief Financial Officer

EX-99.1

TAÚ UNIBANCO HOLDING S.A. CNPJ 60.872.504/0001-23 A Publicly-Held Company NIRE 35300010230 NOTICE TO STOCKHOLDERS Payment of Earnings - interest on capital (IOC) ITAÚ UNIBANCO HOLDING S.A. informs its shareholders that the payment of monthly interest on capital (IOC) for the year 2024, in the amount of R$0.01765 per share, with income tax withholding at a rate of 15%, resulting in net interest of R$0.015 per share, with the exception of any corporate stockholders able to prove they are immune to or exempt from such withholding, will follow the schedule below: Base period Base date Date of the last trading day at B3 Credit to specific account Payment January 12/28/2023 01/30/2024 02/01/2024 February 01/31/2024 02/28/2024 03/01/2024 March 02/29/2024 03/28/2024 04/01/2024 April 03/28/2024 04/29/2024 05/02/2024 May 04/30/2024 05/30/2024 06/03/2024 June 05/31/2024 06/27/2024 07/01/2024 July 06/28/2024 07/30/2024 08/01/2024 August 07/31/2024 08/29/2024 09/02/2024 September 08/30/2024 09/27/2024 10/01/2024 October 09/30/2024 10/30/2024 11/01/2024 November 10/31/2024 11/28/2024 12/02/2024 December 11/29/2024 12/19/2024 01/02/2025 If you have any question, please access www.itau.com.br/relacoes-com-investidores as follows: Investor services > Contact IR. São Paulo (SP), December 05, 2023. RENATO LULIA JACOB Group Head of Investor Relations and Market Intelligence Note: Interest on capital amounts are paid equally for common (ITUB3) and preferred (ITUB4) shares.