6-K

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 January, 2019

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–                                 

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: January 21, 2019.

Itaú Unibanco Holding S.A
By:	/s/    Alexsandro Broedel
	Name:	Alexsandro Broedel
	Title:	Group Executive Finance Director and Head of Investor Relations
By:	/s/    Milton Maluhy Filho
	Name:	Milton Maluhy Filho
	Title:	Chief Financial Officer

EXHIBIT INDEX

99.1 NOTICE TO STOCKHOLDERS

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EX-99.1

Exhibit 99.1

ITAÚ UNIBANCO HOLDING S.A.

CNPJ 60.872.504/0001-23 A Publicly Listed Company NIRE 35300010230

NOTICE TO STOCKHOLDERS

Itaú Unibanco Holding S.A. (“Company”) announces to its stockholders, in complement to the Notice to Stockholders disclosed on November 1, 2018, that the fractions of shares arising from the stock split in 50% approved at the Extraordinary General Meeting held on July 27, 2018, were grouped in whole numbers and sold on the B3 S.A – Brasil, Bolsa, Balcão at an auction held on January 11, 2019.

At this auction, 18,813 book-entry shares, with no par value were sold, 4,498 of which are common shares and 14,315 are preferred shares, for the net price of R$ 32.082596710 for each common shares and of R$ 37.539689836 for each preferred share.

This amount will be available on January 24, 2019 to those stockholders entitled to its receipt as follows:

a) To the stockholders who are registered on the Company’s books:

• who have their reference file updated, the amount will be directly credited by Itaú Corretora de Valores S.A., which is the institution responsible for bookkeeping the Company’s shares, in the current account of the financial institution indicated in the stockholder’s file;

• stockholders who do not have their data or current account information on file or updated, must proceed to an Itaú branch of their preference to update their reference file, bearing their Individual Taxpayers’ Registry card (CPF), their Brazilian Identity card (RG), a proof of address and a proof of bank domicile; and

b) To the remaining stockholders, the payment will be made directly to B3 S.A – Brasil, Bolsa, Balcão, which will transfer the amounts to the stockholders registered on its files by means of their Custody Agents.

São Paulo (SP), January 21, 2019.

ALEXSANDRO BROEDEL

Group Executive Finance Director and Head of Investor Relations

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