ITAÚ UNIBANCO HOLDING S.A.

CNPJ 60.872.504/0001-23

A Publicly Listed Company

ANNOUNCEMENT TO THE MARKET

Conference Calls of the 3^rdquarter 2017 Result

In accordance with the invitation extended to the market participants and regulators and published in the investor relations website of Itaú Unibanco Holding (www.itau.com.br/investor- relations), the company will hold conference calls on October 31, 2017, of the third quarter 2017 result. The information and forecasts presented are based on information available up to the time of the events and involve risks, uncertainties and assumptions that may be beyond our control.

We wish to inform that, with respect to the public conference calls, Itaú Unibanco Holding provides:

On the night of October 30, 2017:

The slides that will be presented, both in English and Portuguese (also sent to the Brazilian Securities and Exchange Commission - CVM and to B3);

Following the scheduled end to the calls (11:30 a .m. in English and 1:00 p.m., in Portuguese, Brasília time):

Audio replays by calling 5511 31931012 or 5511 28204012, the passwords being 1636828 # (English) and 1460000# (Portuguese). The replays will be available immediately following the calls until November 06, 2017;

The audio formats in the Investor Relations site within two hours; and

The transcriptions of the audio replays within a period of five days after the calls.

The public release of this information provides the market with democratic and equitable access, underscoring our commitment to the transparency of our announcements.

São Paulo, October 30, 2017.

Alexsandro Broedel Lopes
Investor Relations Officer

Conference Call 3^rdquarter 2017 – Earnings Review Candido Botelho Bracher President and CEO Caio Ibrahim David Executive Vice-President, CFO and CRO Alexsandro Broedel Lopes Executive Finance Director and Investor Relations Officer Marcelo Kopel Executive Director

Pro Forma Information The merger between Itaú Chile and CorpBanca was concluded on April, 1^st2016. As from the second quarter of 2016, Itaú CorpBanca, the company resulting from this merger, was consolidated in our financial statements, as we are the controlling shareholder of the new bank. In order to allow comparison with previous periods, we are presenting historical pro forma data, that is, the combined result of Itaú Unibanco and CorpBanca for the periods previous to the second quarter of 2016, in the Management Discussion & Analysis report and in this presentation. The pro forma statements above mentioned were prepared considering all lines of the income statement, including 100% of Itaú CorpBanca’s result. The result related to the minority shareholders is shown in the “minority interests in subsidiaries” line, for both CorpBanca and Itaú Chile. As the data was prepared to demonstrate, on a retroactively basis, the effect of a transaction occurred in a subsequent date, there are limits inherent to pro forma information. The data was provided for illustration purposes only and should not be taken as a demonstration of the result that would have been achieved if the merger had occurred on a previous date, nor do they indicate any future result of the combined company. Itaú Unibanco Holding S.A. 2

Main Challenges Seeking excellence and value creation for all our stakeholders, we perceive as our main challenges: Focus on Clients Risk Management We must further increase the focus on clients, aligned with We must endeavor our efforts to fully comply with the Risk international best practices not limited to the financial sector, Appetite guidelines of the Board of Directors. Managing risks developing products and a “service culture” always focused is the essence of our activity and a responsibility of all on client satisfaction throughout all the activities of the bank. employees. Digital Transformation Internationalization Speeding up our digital transformation process, continuously Moving forward in the internationalization process does not increasing the productivity of our IT area and spreading out a necessarily mean to take activities to new countries, but rather to digital mindset throughout the bank is essential to maximize reach, in the countries we are present in, the same management efficiency and to improve user experience and client’s satisfaction. quality and results we have in Brazil. People Management Profitability We must continuously improve the existing models so that we Keeping up the profitability level is what allows us to “dream distinguish ourselves in people management, with processes great dreams” and should be the result of our efforts to exceed in being increasingly perceived as fair and meritorious. all aspects of banking activity, always focused on value creation over time. Itaú Unibanco Holding S.A. 3

Profitability | Sustainable Performance Recurring Net Income (R$ billion) Stockholders’ Equity (R$ billion) Sep-12 57% Sep-17 9M12 9M17 79.0 123.6 76% 10.5 18.6 Dividends & Interest on Own Capital¹net of taxes (R$ billion) 9M12 484% 9M17 Recurring ROE (%) 2.0 11.4 9M12 230 9M17 Value Creation (R$ billion) bps 19.4 21.7 9M12 163% 9M17 2.4 6.2 ¹Paid, provisioned or reserved in Stockholders’ Equity in the period. Itaú Unibanco Holding S.A. 4

Highlights Recurring Net Income 3Q17/2Q17 9M17/9M16 Consolidated R$6.3 bn + 1.4% (3Q17/2Q17) Financial Margin with Clients: - 2.2% - 3.2% R$18.6 bn +13.9% (9M17/9M16) Brazil R$6.0 bn + 0.8% (3Q17/2Q17) Financial Margin with the Market: - 16.2% - 3.1% R$17.9 bn + 15.0% (9M17/9M16) Cost of Credit: - 10.8% - 28.1% Recurring ROE (p.a.) Consolidated 21.6% + 10 bps (3Q17/2Q17) Commissions and Fees and Result from Insurance¹: + 3.7% + 4.1% 21.7% + 170 bps (9M17/9M16) Brazil 22.6% - 10 bps (3Q17/2Q17) Non-interest Expenses: + 2.3% - 0.9% 23.0% + 220 bps (9M17/9M16) Credit Portfolio Credit Quality (Sep-17) - 2.1% - 4.9% (Financial Guarantees Provided and Corporate Securities): Consolidated NPL 90 0.0 bps (Sep-17 / Jun-17) Sep-17 Sep-16 3.2% - 70 bps (Sep-17 / Sep-16) Estimated BIS III (Common Equity Tier I) – Full 14.6% 13.6% Brazil Implementation of BIS III²: - 10 bps (Sep-17 / Jun-17) NPL 90 3 Result from Insurance (-) Retained Claims (-) Insurance Selling Expenses. 3.8% - 100 bps (Sep-17 / Sep-16) ²CET I full with fully loaded Basel III rules after impact of Citibank consolidation and the investment in XP Investimentos and before the use of tax credits. Note: Results from Brazil consider units abroad ex-Latin America. 5

Results In R$ billions 3Q17 2Q17 9M17 9M16 Operating Revenues 27.0 27.2 -0.8% 81.5 82.5 -1.3% Managerial Financial Margin 16.8 17.4 -3.5% 51.6 53.3 -3.2% Financial Margin with Clients 15.4 15.8 -2.2% 46.7 48.3 -3.2% Financial Margin with the Market 1.4 1.6 -16.2% 4.8 5.0 -3.1% Commissions and Fees 8.4 8.0 4.0% 24.2 23.0 5.5% Result from Insurance ¹ 1.9 1.8 3.9% 5.6 6.3 -10.2% Cost of Credit (4.0) (4.5) -10.8% (13.7) (19.1) -28.1% Provision for Loan Losses (4.3) (4.9) -13.5% (14.6) (20.3) -28.1% Impairment (0.3) (0.1) 148.9% (0.8) (0.6) 29.4% Discounts Granted (0.2) (0.3) -12.4% (0.8) (0.9) -17.4% Recovery of Loans Written Off as Losses 0.8 0.8 -6.8% 2.5 2.8 -11.0% Retained Claims (0.3) (0.3) 22.8% (0.9) (1.1) -19.6% Operating Margin 22.7 22.5 0.9% 66.8 62.3 7.3% Other Operating Expenses (13.5) (13.2) 2.2% (39.4) (39.9) -1.1% Non-interest Expenses (11.8) (11.6) 2.3% (34.4) (34.7) -0.9% Tax Expenses and Other ² (1.7) (1.7) 1.2% (5.0) (5.2) -2.4% Income before Tax and Minority Interests 9.2 9.3 -0.9% 27.4 22.4 22.3% Income Tax and Social Contribution (3.0) (2.9) 2.6% (8.6) (5.8) 48.0% Minority Interests in Subsidiaries 0.1 (0.2) -129.1% (0.2) (0.2) -31.5% Recurring Net Income 6.3 6.2 1.4% 18.6 16.3 13.9% Non Recurring Events (0.2) (0.2) 14.5% (0.5) (0.3) 47.9% Net Income 6.1 6.0 1.0% 18.1 16.0 13.2% ¹Result from Insurance includes the Result from Insurance, Pension Plan and Premium Bonds Operations before Retained Claims and Selling Expenses. ²Include Tax Expenses (ISS, PIS, COFINS and other) and Insurance Selling Expenses. Itaú Unibanco Holding S.A. 6

Results – Brazil and Latin America 9M17 9M16 Latin Latin Latin Consolidated Brazil ¹America Consolidated Brazil ¹America Consolidated Brazil ¹America In R$ billions (ex-Brazil) ²(ex-Brazil) ²(ex-Brazil) ²Operating Revenues 81.5 74.8 6.6 82.5 75.4 7.1 -1.3% -0.8% -6.7% Managerial Financial Margin 51.6 46.9 4.7 53.3 48.2 5.1 -3.2% -2.6% -8.6% Financial Margin with Clients 46.7 42.8 3.9 48.3 43.9 4.4 -3.2% -2.5% -10.6% Financial Margin with the Market 4.8 4.1 0.7 5.0 4.3 0.7 -3.1% -4.2% 3.5% Commissions and Fees 24.2 22.4 1.9 23.0 21.1 1.9 5.5% 6.2% -1.7% Result from Insurance ³5.6 5.5 0.1 6.3 6.2 0.1 -10.2% -10.3% -2.5% Cost of Credit (13.7) (12.3) (1.5) (19.1) (17.7) (1.5) -28.1% -30.4% -0.6% Provision for Loan Losses (14.6) (13.1) (1.5) (20.3) (18.7) (1.6) -28.1% -30.2% -2.3% Impairment (0.8) (0.8) - (0.6) (0.6) - 29.4% 29.4% - Discounts Granted (0.8) (0.7) (0.0) (0.9) (0.9) (0.0) -17.4% -20.7% 303.6% Recovery of Loans Written Off as Losses 2.5 2.3 0.1 2.8 2.6 0.1 -11.0% -11.5% 0.6% Retained Claims (0.9) (0.9) (0.0) (1.1) (1.1) (0.0) -19.6% -20.3% 9.4% Operating Margin 66.8 61.7 5.2 62.3 56.6 5.6 7.3% 8.8% -8.3% Other Operating Expenses (39.4) (35.0) (4.4) (39.9) (35.2) (4.7) -1.1% -0.4% -6.8% Non-interest Expenses (34.4) (30.1) (4.3) (34.7) (30.1) (4.6) -0.9% 0.0% -7.1% Tax Expenses and Other ⁴(5.0) (4.9) (0.1) (5.2) (5.1) (0.1) -2.4% -2.6% 6.2% Income before Tax and Minority Interests 27.4 26.6 0.8 22.4 21.5 0.9 22.3% 23.9% -16.2% Income Tax and Social Contribution (8.6) (8.6) (0.1) (5.8) (5.7) (0.1) 48.0% 50.2% -43.1% Minority Interests in Subsidiaries (0.2) (0.1) (0.0) (0.2) (0.2) (0.0) -31.5% -26.7% -51.2% Recurring Net Income 18.6 17.9 0.7 16.3 15.6 0.7 13.9% 15.0% -9.1% ROE (%) 21.7 23.0 8.9 20.0 20.8 11.1 170 bps 220 bps -210 bps ¹Includes units abroad ex-Latin America. 2 Latin America information is presented in nominal currency. ³Result from Insurance includes the Result from Insurance, Pension Plan and Premium Bonds Operations before Retained Claims and Selling Expenses. ⁴Include Tax Expenses (ISS, PIS, COFINS and other) and Insurance Selling Expenses. Itaú Unibanco Holding S.A. 7

Business Model In R$ billions 9M17 9M16 Insurance Insurance Excess Insurance Excess Excess Consolidated Credit Trading Consolidated Credit Trading Consolidated Credit Trading and and Services Capital and Services Capital Capital Services Operating Revenues 81.5 42.1 1.4 35.9 2.1 82.5 44.0 1.9 35.0 1.7 (1.1) (1.9) (0.5) 0.9 0.4 Managerial Financial Margin 51.6 34.4 1.3 13.7 2.1 53.3 36.7 1.9 13.0 1.7 (1.7) (2.3) (0.5) 0.6 0.4 Commissions and Fees 24.2 7.6 0.0 16.6 - 23.0 7.3 0.0 15.7 - 1.3 0.3 0.0 0.9 - Result from Insurance ¹5.6 - - 5.6 - 6.3 - - 6.3 - (0.6) - - (0.6) - Cost of Credit (13.7) (13.7) - - - (19.1) (19.1) - - - 5.4 5.4 - - - Retained Claims (0.9) - - (0.9) - (1.1) - - (1.1) - 0.2 - - 0.2 - Non-interest Expenses and (39.6) (19.1) (0.4) (20.0) (0.1) (40.1) (19.4) (0.2) (20.4) (0.1) 0.5 0.2 (0.1) 0.5 (0.0) Other Expenses ² Recurring Net Income 18.6 6.3 0.6 9.9 1.8 16.3 4.2 0.9 9.8 1.4 2.3 2.1 (0.3) 0.1 0.5 Average Regulatory Capital 118.2 59.6 2.3 27.7 28.6 109.9 56.2 3.4 32.7 17.7 8.3 3.4 (1.1) (5.0) 11.0 Value Creation ³6.2 0.0 0.4 7.1 (1.2) 3.0 (2.6) 0.5 5.9 (0.8) 3.2 2.6 (0.1) 1.1 (0.4) Recurring ROE 21.7% 14.1% 35.1% 47.7% 8.4% 20.0% 10.0% 35.5% 40.2% 10.3% 170 bps 400 bps -30 bps 750 bps -180 bps ¹Result from Insurance includes the Result from Insurance, Pension Plan and Premium Bonds Operations before Retained Claims and Selling Expenses. ²Include Tax Expenses (ISS, PIS, COFINS and other), Insurance Selling Expenses and Minority Interests in Subsidiaries. ³The consolidated cost of equity, for each period, was used to calculate the value creation of the consolidated and of the parties. Itaú Unibanco Holding S.A. 8

Credit Portfolio In R$ billions, end of period 3Q17 2Q17 3Q16 Individuals 179.9 179.4 0.3% 5 182. -1.4% Credit Card Loans 57.2 56.4 1.4% 55.7 2.6% Personal Loans 26.0 25.9 0.3% 27.9 -6.9% Payroll Loans 44.6 44.8 -0.5% 45.6 -2.3% Vehicle Loans 13.9 14.1 -1.5% 15.9 -12.7% Mortgage Loans 38.3 38.3 0.1% 37.3 2.5% Companies 223.7 235.2 -4.9% 2 244. -8.4% Corporate Loans 164.6 175.4 -6.2% 183.4 -10.3% Very Small, Small and Middle Market Loans 59.1 59.8 -1.2% 60.8 -2.8% Latin America 135.5 137.7 -1.6% 0 141. -3.9% Total with Financial Guarantees Provided 539.1 552.3 -2.4% 7 567. -5.0% Corporate Securities 36.1 35.0 3.2% 37.3 -3.3% Total with Financial Guarantees Provided and Corporate 575.2 587.3 -2.1% 1 605. -4.9% Securities Total with Financial Guarantees Provided and Corporate 575.2 583.0 -1.3% 8 601. -4.4% Securities (ex-foreign exchange rate variation) Itaú Unibanco Holding S.A. 9

Financial Margin with Clients Annualized Average Rate 14.0% 14.1% 14.1% 14.1% 14.1% 13.8% 12.7% 11.1% 11.6% 11.0% 11.1% 10.9% 10.1% 10.5% 10.8% 10.3% 10.1% 10.3% 10.3% 7.4% 7.5% 9.2% 6.7% 6.1% 7.3% 7.4% 6.8% 6.6% 6.7% 6.1% 5.4% 3Q15 4Q15 1Q16 2Q16 3Q16 4Q16 1Q17 2Q17 3Q17 Annualized average rate of financial margin with clients - without CorpBanca Annualized average rate of risk-adjusted financial margin with clients - without CorpBanca Annualized average rate of financial margin with clients - with CorpBanca Annualized average rate of risk-adjusted financial margin with clients - with CorpBanca CDI (annualized quarterly rate) Change in Financial Margin with Clients In R$ millions 15,762 39 127 69 43 140 147 168 15,410 BRAZIL 2Q17 Mix of products, Liabilities' Average Asset Working Capital Structured Higher Number Latin America 3Q17 clients and Margin Portfolio1 and other operations from of calendar days Financial Margin spreads the wholesale with Clients 2 segment in 2Q17 3 Considers credit and private securities portfolio net of overdue balance over 60 days. ²Latin America Managerial Financial Margin with clients variance does not consider calendar days impact. This impact was considered in its specific column. Itaú Unibanco Holding S.A. 10

Financial Margin with the Market In R$ billions 1.7 1.7 1.8 1.8 1.7 1.7 1.7 1.7 1.6 2.3 2.0 1.9 1.7 1.7 1.6 1.5 1.4 2.1 1.3 1.7 1.6 1.8 1.2 1.2 1.5 1.3 1.1 0.2 0.3 0.3 0.2 0.2 0.3 0.2 0.1 0.1 3Q15 4Q15 1Q16 2Q16 3Q16 4Q16 1Q17 2Q17 3Q17 Financial Margin with the Market – Brazil1 Financial Margin with the Market - Latin America2, 3 1-year moving average of Financial Margin with the Market ¹ Includes units abroad ex-Latin America; ²Excludes Brazil; ³The Latin America pro forma Financial Margin with the Market from 2015 and 1Q16 does not consider CorpBanca´s information, which is classified in financial margin with clients. Itaú Unibanco Holding S.A. 11

Credit Quality 90-day NPL Ratio - Consolidated - % 15 to 90-day NPL Ratio - Consolidated - % 4.8 4.3 4.2 4.2 4.0 3.9 3.9 3.8 * 3.6 3.8 3.3 3.4 3.2 3.2 2.9 3.0 3.2 3.2 3.2 3.9 2.8 2.8 2.8 3.5 3.4 3.4 2.7 2.6 2.6 3.3 3.2 3.2 3.2 3.0 2.9 3.0 3.0 3.0 3.0 2.9 2.6 2.5 2.6 2.7 2.7 2.7 1.3 1.4 2.5 1.1 1.2 1.1 1.2 1.2 1.2 2.1 2.3 0.7 0.7 0.9 1.7 1.3 1.4 1.5 1.5 1.2 Sep-13 Dec-13 Sep-14 Dec-14 Sep-15 Dec-15 Sep-16 Dec-16 Mar-17 Jun-17 Sep-17 Sep-13 Dec-13 Sep-14 Dec-14 Sep-15 Dec-15 Sep-16 Dec-16 Mar-17 Jun-17 Sep-17 Total Brazil1 Latin America2 Total Brazil1 Latin America2 90-day NPL Ratio - Brazil ¹- % 15 to 90-day NPL Ratio - Brazil ¹- % 6.4 6.1 6.3 5.8 5.8 5.6 5.6 5.2 5.4 5.2 4.9 5.1 4.9 5.8 5.7 5.6 4.2 5.3 5.3 4.2 3.9 4.2 4.0 5.1 4.9 3.8 3.6 3.7 3.5 4.4 4.7 4.2 4.2 2.8 3.9 3.8 3.4 3.5 3.7 3.2 3.0 3.1 1.9 2.0 2.8 1.5 1.3 1.6 * 1.5 3.0 1.1 1.2 1.0 2.6 1.0 1.0 0.6 0.8 0.9 0.8 0.8 0.9 0.7 0.5 0.4 0.5 Sep-13 Dec-13 Sep-14 Dec-14 Sep-15 Dec-15 Sep-16 Dec-16 Mar-17 Jun-17 Sep-17 Sep-13 Dec-13 Sep-14 Dec-14 Sep-15 Dec-15 Sep-16 Dec-16 Mar-17 Jun-17 Sep-17 Individuals Corporate Very Small, Small and Middle Market Companies Individuals Corporate Very Small, Small and Middle Market Companies Note: Total and Latin America 15 to 90-day NPL Ratios prior to June 2016 do not include CorpBanca. 1 Includes units abroad ex-Latin America. 2 Excludes Brazil. * Had the sale of assets not been carried out, 90 day NPL Ratio of Brazil and Corporate would have been 3.9% and 1.1% in September 2017, respectively. Itaú Unibanco Holding S.A. 12

NPL Creation In R$ billions 6.8 6.3 6.0 5.7 5.3 5.3 4.9 4.5 4.4 4.4 4.3 4.3 4.2 4.1 3.8 3.5 3.8 3.6 2.3 1.3 1.5 1.0 1.1 1.0 0.8 0.4 0.5 0.6 0.8 0.3 0.4 0.5 0.2 0.1 0.2 0.2 3Q15 4Q15 1Q16 2Q16 3Q16 4Q16 1Q17 2Q17 3Q17 Total Retail Banking - Brazil Wholesale Banking - Brazil Latin America ex-Brazil Itaú Unibanco Holding S.A. 13

Provision for Loan Losses and Cost of Credit Provision for Loan Losses by Segment In R$ billions 5.8% 4.3% 4.4% 4.6% 5.0% 5.0% 4.7% 4.5% 4.0% 4.0% 3.9% 4.3% 4.1% 3.6% 7.8 5.8 6.0 6.4 0.8 6.3 6.2 5.8 5.7 5.4 4.9 4.6 4.9 4.8 0.4 2.7 0.4 0.4 4.3 1 0.3 ^0.40.4 0.4 1.4 1.5 0.8 0.4 0.2 0.3 1.9 1.6 1.3 1.8 1.1 1.4 0.6 0.6 0.9 1.1 0.6 0.5 0.5 1 3.9 3.6 3.7 4.3 4.6 4.3 4.4 3.9 4.0 3.5 3.7 3.4 3.5 3.2 2Q14 3Q14 4Q14 1Q15 2Q15 3Q15 4Q15 1Q16 2Q16 3Q16 4Q16 1Q17 2Q17 3Q17 Retail Banking - Brazil Wholesale Banking - Brazil Latin America ex-Brazil Provision for Loan Losses / Loan portfolio (*) – Annualized (*) Average balance of the loan portfolio, considering the last two quarters. 1 Had the sale not been carried out, provisions for loans losses would be R$4.4 billion in Consolidated and R$0.6 billion in Wholesale segment Cost of Credit In R$ billions (Provision for Loan Losses + Recovery of Loans Written Off as Losses + Impairment + Discounts Granted) 4.4% 4.1% 4.2% 3.7% 3.6% 2.9% 3.1% 3.0% 3.0% 2.7% 7.2 6.3 6.4 4.8 5.1 5.1 5.6 5.3 4.5 4.0 2Q15 3Q15 4Q15 1Q16 2Q16 3Q16 4Q16 1Q17 2Q17 3Q17 Custo do Crédito Cost of Credit / Total Risk (*) – Annualized (*) Average balance of the loan portfolio with endorsements, sureties and corporate securities, considering the last two quarters. Itaú Unibanco Holding S.A. 14

Total Allowance by Type of Risk – Consolidated In R$ Allocation of Total Allowance^(*)by Type of Risk - Consolidated Regulatory Breakdown 39.1 36.6 37.4 36.6 Complementary Expected and/or Allowance Potential Loss Retail – Brazil1 5.8 8.7 Related to expected loss in Retail segment Wholesale –Brazil1 9.0 16.6 Provision for Financial and potential loss in Guarantees Provided 17.2 Wholesale segment Latin America2 2.2 1.9 17.0 Potential3 Generic Renegotiations (non-overdue / aggravated) Allowance Renegotiation and overdue loans Retail – Brazil1 0.9 4.3 5.2 12.2 Related to aggravated 9.3 risk rating of overdue Wholesale –Brazil1 0.5 2.9 3.4 and renegotiated 9.9 9.7 operations Latin America2 0.3 0.8 1.1 Aggravated Specific Overdue operations Fully Provisioned Allowance according to the Brazilian Central Bank Retail – Brazil1 2.6 5.5 8.1 13.8 13.2 Related to minimum 10.3 10.0 Wholesale –Brazil1 0.4 0.5 0.9 Overdue provision required for overdue operations Latin America2 0.5 0.5 1.0 according to CMN Resolution 2,682/1999 Sep-16 Jun-17 Sep-17 Sep-17 1 Includes units abroad ex-Latin America. 2 Excludes Brazil. 3 Allowance for potential losses includes the provision for financial guarantees provided. (*) Total allowance includes the provision for financial guarantees provided, which is recorded in liabilities as from March 2017, in accordance with CMN Resolution No. 4,512/16. Itaú Unibanco Holding S.A. 15

Coverage Ratio (90-day NPL) Coverage Ratio and Expanded Coverage Ratio Coverage Ratio 932% 715% 246% 345% 243% 231% 245% 241% 222% 212% 210% 215% 228% 206% 204% 159% 166% 164% Without CorpBanca With Itaú CorpBanca 100% 102% 104% 104% 104% 104% 101% 100% 97% Sep-15 Dec-15 Mar-16 Jun-16 Sep-16 Dec-16 Mar-17 Jun-17 Sep-17 Sep-16 Jun-17 Sep-17 Latin America ex-Brazil Total Total (Expanded¹) Retail Banking - Brazil 1 Expanded Coverage Ratio is calculated from the division of the total allowance balance* by the sum of 90 days overdue operations and Wholesale Banking - Brazil of renegotiated loan portfolio excluding the double counting of 90 days overdue renegotiated loans. Expanded Coverage Ratio data prior to June 2016 do not include CorpBanca. (*) Total allowance used for calculation of the coverage and expanded coverage ratios includes the provision for financial guarantees provided, which is recorded in liabilities as from March 2017, in accordance with CMN Resolution No. 4,512/16. Itaú Unibanco Holding S.A. 16

Commissions & Fees and Result from Insurance In R$ billions 3Q17 2Q17 9M17 9M16 Credit Cards 3.1 3.0 2.8% 9.1 9.0 0.5% Current Account Services 1.7 1.7 1.2% 5.0 4.7 6.3% Asset Management¹ 0.9 0.8 14.2% 2.6 2.2 19.0% Credit Operations and Guarantees Provided 0.8 0.8 0.4% 2.5 2.4 5.2% Collection Services 0.4 0.4 3.3% 1.3 1.2 7.2% Advisory Services and Brokerage 0.4 0.3 27.8% 1.0 0.7 45.6% Other 0.3 0.3 -4.3% 0.9 0.9 2.3% Latin America (ex-Brazil) 0.6 0.6 1.1% 1.9 1.9 -1.7% Commissions and Fees 8.4 8.0 4.0% 24.2 23.0 5.5% Result from Insurance Operations² 1.5 1.5 1.8% 4.5 4.7 -2.6% Total 9.8 9.5 3.7% 28.8 27.6 4.1% ¹Includes fund management fees and consortia management fees. ²Result from Insurance includes the Result from Insurance, Pension Plan and Premium Bonds Operations net of Retained Claims and Selling Expenses. Itaú Unibanco Holding S.A. 17

Non-Interest Expenses In R$ billions 3Q17 2Q17 9M17 9M16 Personnel Expenses (5.0) (5.0) 0.6% (14.8) (14.8) -0.3% Administrative Expenses (4.0) (4.0) -0.2% (11.7) (11.6) 1.4% Personnel and Administrative Expenses (9.0) (9.0) 0.3% (26.5) (26.4) 0.4% Operating Expenses (1.4) (1.3) 9.9% (3.7) (3.8) -3.5% Other Tax Expenses ⁽¹⁾ (0.1) (0.1) 7.6% (0.3) (0.3) -8.9% Latin America (ex-Brazil) ⁽²⁾ (1.4) (1.2) 9.0% (3.9) (4.2) -6.8% Total (11.8) (11.6) 2.3% (34.4) (34.7) -0.9% ( - ) Extraordinary Events ⁽³⁾ - - - - (1.0) - Total (ex-extraordinary events) (11.8) (11.6) 2.3% (34.4) (33.7) 1.9% ¹Includes IPTU, IPVA, IOF and other. Does not include PIS, Cofins and ISS; ²Does not consider overhead allocation; 3 Related to the methodology enhancement for calculating labor claims in the amount of R$687 million and to the lump-sum bonus to employees related to the collective bargaining agreement, in the amount of R$275 million. # Employees # Branches and Client Service Branches 99,033 97,865 97,043 96,460 95,984 94,779 94,955 95,065 96,326 5,307 5,279 5,215 5,154 5,119 5,103 5,005 4,955 4,919 74 94 108 115 130 135 13,785 13,672 13,469 13,531 13,282 144 154 156 13,552 13,260 13,116 13,204 758 712 703 716 643 695 648 620 609 3,871 3,821 3,755 3,707 3,664 3,653 3,553 3,523 3,523 84,490 83,481 82,871 82,213 81,737 80,871 81,219 81,252 82,401 822 824 813 794 780 766 757 736 718 540 540 539 538 545 549 551 542 522 Sep-15 Dec-15 Mar-16 Jun-16 Sep-16 Dec-16 Mar-17 Jun-17 Sep-17 Sep-15 Dec-15 Mar-16 Jun-16 Sep-16 Dec-16 Mar-17 Jun-17 Sep-17 Brazil Abroad (ex-Latin America) Latin America Branches + CSB (Latin America ex-Brazil) CSB - Brazil Brick and Mortar Branches - Brazil Digital Branches - Brazil Itaú Unibanco Holding S.A. 18

Core Capital Ratio (Common Equity Tier I) Changes in the Core Capital Ratio 15.7% 0.8% -0.2% 0.1% 0.2% 0.1% 16.7% Common Equity 3Q17 Dividends and Interest on Other changes in Tax Credits Risk-Weighted Assets Common Equity Tier I Jun-17 Net Income Own Capital stockholder's equity Tier 1 Sep-17 Full application of Basel III rules │September 30, 2017 16.7% -0.6% 16.1% -0.3% 15.8% -1.2% 14.6% -1.1% 13.5% Common Equity Deductions CET I Risk-weighted CET I with Impact CET I with fully Additional dividends CET I with fully Tier I (CET I) schedule with full assets rules fully loaded of Citibank loaded Basel III and interest on own loaded Basel III Sep-17 anticipation1 deductions anticipation 2 Basel III rules consolidation and rules after impact capital reserved in rules after additional the investment in XP3 of Citibank stockholder's equity Dividends and consolidation and Interest on own the investment in XP4 capital reserved in stockholder's equity ¹Includes deductions of Goodwill, Intangible Assets (generated before and after October 2013), Tax Credits from Temporary Differences and Tax Loss Carryforwards, Pension Fund Assets, Equity Investments in Financial Institutions, Insurance and similar companies. ²Includes the increase of the multiplier of the amounts of market risk, operational risk and certain credit risk accounts. This multiplier, which is at 10.8 nowadays, will be 12.5 in 2019. ³The consolidation of Citibank considers the retail business (for individuals) in Brazil. Estimated impacts based on preliminary information and pending regulatory approvals. ⁴If we considered the use of tax credits, CET I with fully loaded Basel III rules would be 15.4% (Does not consider any reversal of complementary allowance for loan losses). Itaú Unibanco Holding S.A. 19

Capital Management In order to manage capital efficiently, aiming at creating value to our shareholders, we announced through a Material Fact disclosed on September 26, 2017, that we intend to: · Maintain the practice of paying dividends and interest on own capital at 35% of net income, however we excluded the maximum limit previously determined at 45%. · Set forth, through the Board of Directors, the total amount to be distributed each year considering: • the company’s capitalization level, according to rules issued by the Brazilian Central Bank; • the minimum Tier 1 Capital* of 13.5% determined by the Board of Directors (currently at 14.6%*). We highlight that this ratio must be composed of at least 12% of Core Capital; • the profitability in the year; • the expectations of capital use based on the expected business growth, share buyback programs, mergers and acquisitions and regulatory changes that may change capital requirement; • changes in tax legislation. Therefore, the percentage to be distributed may change every year based on the company’s profitability and capital demands, always considering the minimum distribution set forth in the Bylaws. Total Payout¹simulation to keep Tier I Capital* at 13.5% under different return and growth scenarios: ROE³ 15.00% 17.50% 20.00% 22.50% 25.00% 5.00% 65 – 70% 70 – 75% 75 – 80% 80 – 85% 85 - 90% RWA²10.00% 40 – 45% 45 – 50% 50 – 55% 55 – 60% 60 – 65% Growth 15.00% 25% 25 – 35% 35 – 40% 40 – 45% 45 – 50% * Taking into consideration the full application of Basel III rules, in addition to the impacts from the acquisition of Citibank’s Brazilian retail operations and the minority interest of 49.9% in XP Investimentos. (1) Includes total amounts of dividends and share buyback. Simulations include the June 2017 base and Citibank’s Brazilian retail business and the 49.9% minority interest in XP Investimentos transactions; (2) Risk-Weighted Assets; (3) Return on Equity. Dividends and Interest on Own Capital net of Taxes In the first nine months of 2017, we paid or provisioned R$3.9 billion and reserved R$7.5 billion in stockholder’s equity in dividends and interest on capital net of taxes, totaling R$11.4 billion. Itaú Unibanco Holding S.A. 20

2017 Forecast We kept unchanged the ranges of our 2017 forecast. Consolidated ¹Brazil ^{1, 2} Total Credit Portfolio 3 From 0.0% to 4.0% From -2.0% to 2.0% Financial Margin with Clients ⁴ From -4.2% to -0.8% From -5.2% to -1.8% (ex-Impairment and Discounts Granted) Cost of Credit 5 Between R$15.5 bn and R$18.0 bn Between R$13.5 bn and R$16.0 bn Commissions and Fees and Result from 6 From 0.5% to 4.5% From 0.0% to 4.0% Insurance Operations Non-Interest Expenses From 1.5% to 4.5% From 3.0% to 6.0% (1) Considers USD-BRL exchange rate at R$3.50 in Dec-17; (2) Includes units abroad ex-Latin America; (3) Includes financial guarantees provided and corporate securities; (4) The evolution of the Financial Margin with Clients also considers the reclassification of Discounts Granted to the Cost of Credit line in 2016; (5) Composed of Result from Loan Losses, Impairment and Discounts Granted; (6) Commissions and Fees (+) Income from Insurance, Pension Plan and Premium Bonds Operations (-) Expenses for Claims (-) Insurance, Pension Plan and Premium Bonds Selling Expenses. Itaú Unibanco Holding S.A. 21

Acquisition of Citibank’s Retail Business in Brazil On October 26, we announced that we obtained the final regulatory authorization required for the acquisition of Citibank’s retail business (for individuals) in Brazil. This transaction includes loans, deposits, credit cards, branches, asset management and insurance brokerage, as well as the equity investments held by Citibank. This transaction adds to our operation: R$8.6 billion in assets R$6.2 billion credit portfolio R$4.8 billion in deposits A base of around 300,000 clients and the incorporation of commissions and fees and other revenues related to banking services, such as asset management and service account fees, among others. With the completion of this phase of the transaction, we reaffirm our commitment to the Brazilian market and the creation of long-term value for our shareholders. Itaú Unibanco Holding S.A. 22