Santander: 24/03/2025 - Banco Santander SA: 03/24/2025 - Manual for Ordinary and Extraordinary Shareholders Meeting on 04/25/2025

MANUAL FOR ATTENDANCE AT THE ORDINARY AND EXTRAORDINARY GENERAL MEETINGS April 25, 2025 1 2 3 4 1. INVITATION FROM MANAGEMENT Dear Shareholder , It is with great pleasure that I invite you, a shareholder of Santander Brasil, to participate in our Ordinary and Extraordinary General Meetings ("OEGM"). This Manual was prepared to assist you in understanding the matters presented, providing a conscious and reasoned decision-making process, anticipating possible clarifications and voting guidelines. In order to facilitate your analysis and appreciation of the matters to be resolved, this Manual includes the information made available in addition to the Call Notice. This Manual must be read together with the Management Proposal and other documents related to our General Meeting, available on the Company's investor relations website (www.ri.santander.com.br), on the CVM website (www.cvm .gov.br) and on the B3 website (www.b3.com.br). We are at your disposal to clarify any questions through the emails acionistas@santander.com.br oriented at non-financial individual and corporate investors and ri@santander.com.br for institutional investors. We hope that this Manual fulfills its purpose in assisting your decision making. Your participation is essential for the Company. 2. CALL NOTICE BANCO SANTANDER (BRASIL) S.A. Publicly-Held Company with Authorized Capital CNPJ/MF 90.400.888/0001-42 - NIRE 35.300.332.067 CALL NOTICE - ORDINARY AND EXTRAORDINARY GENERAL MEETINGS - Shareholders are hereby invited to attend the Ordinary and Extraordinary General Meetings ("OEGM") to be held on April 25, 2025, at 3:00 PM, at the principal place of business of the Company, located at Avenida Presidente Juscelino Kubitschek No. 2041 - 2nd mezzanine, Vila Nova Conceição, São Paulo/SP, to resolve upon the following Agenda: At the Ordinary General Meeting: 2. CALL NOTICE As provided for in Article 5, § 4, of CVM Resolution No. 81/22, with the amendments introduced by CVM Resolutions No. 59/21 and 204/24, the Company understands that holding the OEGM in person allows for a closer environment between shareholders and the attending Company's management, facilitating the clarification of doubts and the discussion of relevant matters, enabling a closer environment to deliberations and decision-making. In addition, it ensures greater security in the transmission of information, avoiding risks associated with technical or cyber failures. In this sense, the Company recommends and encourages the participation of its shareholders in its Meetings, using the various participation channels made available, whether through the use of remote voting instruments, through the available electronic means or even by sending written votes to the Company or granting standardized proxies with voting instructions, in accordance with the instructions made available in the Management Proposal for the Ordinary and Extraordinary General Meetings of April 25, 2025. General Instructions 1. As provided in CVM Resolution No. 70/22, the minimum percentage of participation in the voting capital required for the application of the cumulative voting process (processo de voto múltiplo) for the election of the members of the Board of Directors is of 5%; 3. ATTENDANCE AT THE MEETING Santander Brasil shareholders may participate in the OEGM in person or by proxy, as specified in item 3.2 below or even by Remote Voting Ballot. Shareholders will be required to provide the following documents to participate in the OEGM. 3.1. In-person Participation 3. ATTENDANCE AT THE MEETING 3.2. Participation by Proxy The shareholder may be represented at the OEGM by an attorney-in-fact, duly appointed under a public or private instrument, and pursuant to article 126, § 1 of the Corporations Act, the attorneys-in-fact shall have been appointed less than one (1) year ago, and they shall be (i) shareholders of the Company, (ii) managers of the Company, (iii) lawyers, or (iv) financial institutions, with the investment fund's manager being responsible for representing the quota holders. The originals or copies of the documents mentioned above may be delivered at the Company's principal place of business by the time the OEGM is held. However, in order to facilitate shareholders' access to the OEGM, we recommend that the delivery of such documents be made at least seventy-two (72) hours before the OEGM is held. In the case of submittal of documents via email, we request that the shareholder contact the Company, so that the originals or copies can be delivered by the day the OEGM is held. In case the Shareholder is unable to attend the OEGM or cannot yet be represented by an attorney-in-fact of his/her/their choice, the Company will make available an attorney-in-fact to vote for the shareholder, in accordance with his/her/their voting instructions, according to the power of attorney template in Exhibit 1 to this Manual. 3. ATTENDANCE AT THE MEETING The Shareholder who chooses to cast the remote vote through the Company's Bookkeeper shall observe the following instructions, so that the Ballot can be deemed valid and the votes are counted: The same documents listed at the beginning of this section for Individuals, Legal Entities and Investment Funds must be sent to the Bookkeeper up to 4 days before the date of the OEGM, in the other words, by 04/22/2025 (including) (i) at the following address: Banco Santander (Brasil) S.A. - Shareholders - Bookkeeping of Shares - Rua Amador Bueno, 474 - 2nd floor - Setor vermelho - Santo Amaro - São Paulo/SP - CEP 04752- 005; or (ii) via email, to the electronic address acoes@santander.com.br. After receiving the documents, the Bookkeeper, within three (3) days, will inform the Shareholder regarding the receipt of the documents and their acceptance. If the submitted documentation is not considered suitable, the Ballot shall be considered invalid, and the Shareholder may regularize it by 04/22/2025 (including) . Remote voting ballots received by the Bookkeeper after 04/22/2025 shall be disregarded. 3. ATTENDANCE AT THE MEETING The Shareholder who chooses to cast the remote vote through the Company shall observe the following instructions, so that the Ballot can be deemed valid and the votes are counted: The same documents listed at the beginning of this section for Individuals, Legal Entities and Investment Funds must be sent to the Company up to 4 days before the date of the OEGM, in the other words, by 04.22.2025 (including) (i) at the following address: Banco Santander (Brasil) S.A. - Relações com Investidores - Avenida Presidente Juscelino Kubitscheck, 2041 - 26º andar - Vila Nova Conceição - São Paulo/SP - CEP 04543-011; or (ii) via email, to the electronic address ri@santander.com.br. After receiving the documents, the Company, within three (3) days, will inform the Shareholder regarding the receipt of the documents and their acceptance. If the submitted documentation is not considered suitable, the Ballot shall be considered invalid, and the Shareholder may regularize it by 04/22/2025 (including) . Remote voting ballots received by the Bookkeeper after 04/22/2025 shall be disregarded.