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 November, 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

99.1 ITAÚ UNIBANCO - ANNOUNCEMENT TO THE MARKET - Closing of the sale of Banco Itaú Argentina S.A.

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: November 3, 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

ITAÚ UNIBANCO HOLDING S.A. CNPJ60.872.504/0001-23 A Publicly-Held Company NIRE 35300010230 ANNOUNCEMENT TO THE MARKET Itaú Unibanco Holding S.A. (“Itaú Unibanco”) informs its stockholders and the market in general that, after obtaining the authorization from the Central Bank of the Republic of Argentina, it closed as of this date, through its affiliates, the sale of all its shares held in Banco Itaú Argentina S.A. and its subsidiaries (“BIA”) to Banco Macro S.A. (“Macro”), as announced in the Material Fact issued on August 23, 2023. On this date, for the closing of the transaction, Itaú Unibanco received from Macro the amount of US$50 million. The non-recurring impact of this transaction will be recognized in the income statement for the third quarter of 2023, and it was negative by R$1,212 million. With this transaction, Itaú Unibanco reaffirms its commitment to the Brazilian market and the creation of long-term value for its stockholders. São Paulo (SP), November 3, 2023. RENATO LULIA JACOB Group Head of Investor Relations and Market Intelligence