Trading of Own Shares for Treasury Month: June 2018

ITAÚ UNIBANCO HOLDING S.A.

CNPJ. 60.872.504/0001-23

A Publicly Listed Company

NIRE 35300010230

Announcement to the Market

Trading of Own Shares for Treasury

Month: June 2018

• 1. We inform the capital market agents that, during June 2018, Itaú Unibanco acquired(a) 13,100,000 preferred shares for treasury stock by the average acquisition price(b) of R$ 38.89, totalizing approximately R$ 509.5 million.

• 2. Also in June, Itaú Unibanco reallocated in the market the amount of 4,705 preferred shares under the stock option plan approved by General Stockholders' Meeting.

• 3. Historical information regarding purchase of own shares for treasury stock is available on the Company's Investor Relations website(www.itau.com.br/investor-relations).

São Paulo-SP, July 10, 2018.

ALEXSANDRO BROEDEL

Group Executive Finance Director and Investor Relations Officer

• (a) The limit for purchases under the program currently in force is up to 28,616,649 own common shares and 50 million own preferred shares for the period from 12/20/2017 to 06/19/2019. Itaú Unibanco did not purchase own common shares in June 2018.

• (b) The repurchase amounts do not include settlement, brokerage and trading fees. The minimum and maximum acquisition prices practiced in the month were, respectively, R$ 37.39 and R$ 40.00 for preferred shares.