Exhibit 99.1

ITAÚ UNIBANCO HOLDING S.A. CNPJ. 60.872.504/0001-23A Publicly Listed Company ANNUAL GENERAL STOCKHOLDERS’ MEETING Summarized voting map sent by the Registrar and Transfer of Shares Agent According to CVM Instruction Nº 481/09, Itaú Unibanco Holding S.A. (“Company”) discloses the summarized voting map that consolidates the voting instructions received from the registrar and transfer of shares agent, identifying the number of approvals, rejections and abstentions in each item presented in the remote voting form received on the matters submitted for the resolution of the Annual General Stockholders’ Meeting to be exclusively held online on April 27, 2021, 11:00 a.m., with the purpose to: Number of% over total ItemDescription—ordinary agendaCandidatesVoting sharesvoting Approve Resolve on the allocation of net income for the fiscal year as detailed in the8,972,08899.18745 GeneralStockholders’MeetingManualavailableat: 1Reject https://www.itau.com.br/relacoescominvestidores/listgroup.aspx?idCanal=Sqjrl1— eBRjH/MQgu2IlC3Q==&linguagem=enAbstain 73,5000.81255 Approve Take cognizance of the Management’s Report, the Report of the Independent8,913,31598.53771 Auditors, the Opinion of the Fiscal Council, and the Summary of the Report of the 2Reject Audit Committee, and examine them for resolution on the Financial Statements— for the fiscal year ended December 31, 2020:Abstain 132,2731.46229 Approve 8,972,08899.18745 Fix the number of members who will comprise the Board of Directors in twelve 3Reject (12) as proposed by the controlling shareholders:— Abstain73,5000.81255 Yes124,8001.37968 Do you want to request the adoption of the multiple vote process for the election 4No244,7002.70519 of the Board of Directors, pursuant to Article 141 of Law No. 6,404 of 1976? Abstain8,676,08895.91514 Approve 8,963,58899.09348 Alfredo Egydio SetubalReject 8,5000.09397 Abstain 73,5000.81255 Approve 8,963,58899.09348 Ana Lúcia de Mattos Barretto VillelaReject 8,5000.09397 Abstain73,5000.81255 Approve7,823,05386.48474 Candido Botelho BracherReject1,149,03512.70271 Abstain73,5000.81255 Approve 8,972,08899.18745 Fábio Colletti Barbosa Reject (Conselheiro Independente)— Abstain 73,5000.81255 Approve8,972,08899.18745 Frederico Trajano Inácio Reject— (Conselheiro Independente) Abstain73,5000.81255 Election of the board of directors by candidate—Total members to be elected: 12 -Approve8,963,58899.09348 Nomination of candidates to the Board of Directors (the stockholder mayJoão Moreira SallesReject 8,5000.09397 nominate as many candidates as the number of vacancies to be fulfilled in the 5general election. The votes indicated in this field will be disregarded if theAbstain73,5000.81255 shareholder holding voting shares also fills in the fields present in the separateApprove7,823,05386.48474 election of a member of the board of directors and the separate election coveredMarco Ambrogio Crespi Bonomi Reject by these fields occurs)(Conselheiro Independente)1,149,03512.70271 Abstain73,5000.81255 Maria Helena dos Santos FernandesApprove8,972,08899.18745 de SantanaReject— (Conselheiro Independente) Abstain73,5000.81255 Approve7,823,05386.48474 Pedro Luiz Bodin de Moraes Reject1,149,03512.70271 (Conselheiro Independente) Abstain73,5000.81255 Approve8,963,58899.09348 Pedro Moreira SallesReject8,5000.09397 Abstain73,5000.81255 Approve 8,963,58899.09348 Ricardo Villela MarinoReject 8,5000.09397 Abstain 73,5000.81255 Approve 8,963,58899.09348 Roberto Egydio SetubalReject 8,5000.09397 Abstain 73,5000.81255 Yes If the multiple voting process is adopted, do you want to distribute the vote133,3001.47365 adopted as the same percentage to the candidates? [If the shareholder chooses 6No to abstain and the election occurs through the multiple vote process, his/her-- vote must be counted as abstention in the respective resolution of the meeting.] Abstain 8,912,28898.52635 #Corporativo | Interno

Alfredo Egydio Setubal 10,3967.80180 Ana Lúcia de Mattos Barretto Villela 10,3967.80180 Candido Botelho Bracher 10,3967.80180 Fábio Colletti Barbosa (Conselheiro Independente)13,2299.92793 Frederico Trajano Inácio (Conselheiro Independente)13,2299.92793 João Moreira Salles View of all candidates for the assignment of the % (percentage) of votes to be10,3967.80180 7 attributedMarco Ambrogio Crespi Bonomi (Conselheiro Independente)10,3967.80180 Maria Helena dos Santos Fernandes de Santana (Conselheiro Independente)13,2299.92793 Pedro Luiz Bodin de Moraes (Conselheiro Independente)10,3967.80180 Pedro Moreira Salles 10,3967.80180 Ricardo Villela Marino 10,3967.80180 Roberto Egydio Setubal 10,3967.80180 Minority stockholders with voting rights requesting a separate election of aYes member to the Board of Directors: Do you want to request a separate election of10,817,36090.45332 a member to the Board of Directors, in accordance with Article 141, paragraph 4, 8No I, of Law No. 6,404 of 1976? (the shareholder can only fill in this field if he/she is-- the uninterrupted holder of the shares with which he/she votes during the 3 months immediately prior to the general meeting) (*)Abstain 1,141,6939.54668 Minority stockholders with voting rights requesting a separate election of a member to the Board of Directors: If neither stockholders with voting rights norYes preferred stockholders with no or restricted voting rights meet the quorum,4,260,70035.62740 respectively, as required by items I and II of paragraph 4 of Article 141 of Law No. 9No 6,404 of 1976, do you want your vote to be added to the votes of preferred — shares to elect, to the Board of Directors, the candidate with the majority of votes among all those who, as included in this remote voting form, run forAbstain election separately? (*)7,698,35364.37260 Preferred stockholders with no or restricted voting rights requesting a separateYes election of a member to the Board of Directors: Do you want to request a890,399,59570.86405 separate election of a member to the Board of Directors, in accordance to Article 10No 141, paragraph 4 II of Law No. 6,404 of 1976? (the shareholder can only fill in this200,968,99715.99448 field if he/she is the uninterrupted holder of the shares with which he/she votes during the 3 months immediately prior to the general meeting) (*)Abstain 165,121,26813.14147 Preferred stockholders with no or restricted voting rights requesting a separate election of a member to the Board of Directors: If neither voting stockholders norYes preferred stockholders with no or restricted voting rights meet the quorum,901,572,46971.75326 respectively, as required by items I and II of paragraph 4 of Article 141 of Law No. 116,404 of 1976, do you want your vote to be added to the votes of voting shares toNo elect, to the Board of Directors, the candidate with the majority of votes among225,044,72517.91059 all those who, as included in this remote voting form, run for election separately? Abstain (*)129,872,66610.33615 Approve 8,972,08899.18745 Alkimar Ribeiro Moura (efetivo) / Reject João Costa (suplente)— Election of the fiscal council by candidate—Total members to be elected: 2Abstain Nomination of candidates to the Fiscal Council (the stockholder may nominate as73,5000.81255 12 many candidates as the number of vacancies to be fulfilled in the general election)Approve 8,972,08899.18745 José Caruso Cruz Henriques (efetivo) Reject / Reinaldo Guerreiro (suplente)— Abstain 73,5000.81255 Approve 1,382,482,15797.06074 Separate election of the fiscal council—Preferred shares Artemio Bertholini (efetivo) / Rene 13Nomination of candidates to the fiscal council by stockholders holding preferredReject Guimarães Andrich (suplente)9,109,4520.63955 shares without voting or restricted voting rights Abstain 32,755,7922.29971 Approve 8,972,08899.18745 Resolve on the amount allocated to the overall compensation of the members of 14the Company’s Board of Officers and Board of Directors in the total amount ofReject R$450,000,000.00:— Abstain 73,5000.81255 Approve 7,831,55386.57871 Resolve on the monthly individual compensation of R$15,000.00 to effective 15Reject members and R$6,000.00 to alternate members of the Fiscal Council:-- Abstain 1,214,03513.42129 (*) This refers to the total equity investments, without considering the uninterrupted percentage during the period of three months, at least, immediately prior to the General Stockholders’ Meeting provided for in paragraph 6 of Article 141 of Law No. 6,404/76. São Paulo-SP, April 23, 2021. RENATO LULIA JACOB Group Head of Investor Relations and Market Intelligence #Corporativo | Interno

ITAÚ UNIBANCO HOLDING S.A. CNPJ. 60.872.504/0001-23A Publicly Listed Company EXTRAORDINARY GENERAL STOCKHOLDERS’ MEETING Summarized voting map sent by the Registrar and Transfer of Shares Agent According to CVM Instruction Nº 481/09, Itaú Unibanco Holding S.A. (“Company”) discloses the summarized voting map that consolidates the voting instructions received from the registrar and transfer of shares agent, identifying the number of approvals, rejections and abstentions in each item presented in the remote voting form received on the matters submitted for the resolution of the Extraordinary General Stockholders’ Meeting to be exclusively held online on April 27, 2021, 11:10 a.m., with the purpose to: Number of% over total ItemDescription—extraordinary agendaVoting sharesvoting Approve18,645,00599.60734 Amend the Bylaws to streamline the structure of the Board of Officers, leaving 1Reject only the positions of Chief Executive Officer and Officer (items 9.1, 9.3 e 10.3):— Abstain 73,5000.39266 Approve Amend the Bylaws to provide for the setting up of an Executive Committee, the18,645,00599.60734 2Company’s highest executive body, to be defined by the Board of Directors (itemReject — 9.2): Abstain73,5000.39266 Amend the Bylaws to change the way of the Company’s representation, which Approve will be carried out by two Officers together and, when the amount involved in a18,645,00599.60734 3transaction exceeds R$500 million, at least one of the Officers must be either theReject Chief Executive Officer or another Officer who is a member of the Executive— Committee (article 10 and item 10.1):Abstain 73,5000.39266 Approve18,645,00599.60734 Consolidate the Bylaws by carrying out the amendments mentioned in 4Reject— aforementioned and resulting adjustments to wording: Abstain73,5000.39266 São Paulo-SP, April 23, 2021. RENATO LULIA JACOB Group Head of Investor Relations and Market Intelligence #Corporativo | Interno