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SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16 of the

Securities Exchange Act of 1934

For the month of March, 2026

Commission File Number 1-34129

CENTRAIS ELÉTRICAS BRASILEIRAS S.A. - ELETROBRÁS

(Exact name of registrant as specified in its charter)

BRAZILIAN ELECTRIC POWER COMPANY

(Translation of Registrant's name into English)

Rua da Quitanda, 196 – 24th floor,
Centro, CEP 20091-005,
Rio de Janeiro, RJ, 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 ___X___ Form 40-F _______

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes _______ No___X____

REMOTE VOTING BALLOT

AGM – CENTRAIS ELET BRAS S.A. – ELETROBRAS to be held on 04/15/2026

Shareholder's Name:

Shareholder's CNPJ or CPF:

E-mail:

Filling Instructions:

Should a shareholder of Centrais Elétricas Brasileiras S.A. – Eletrobras ("Company" or "AXIA Energia") choose to exercise its right to vote remotely at the Company's Annual and Extraordinary General Shareholder's Meeting ("AEGM"), to be held on April 15, 2026, at 2:00 p.m., this remote voting ballot ("BVD") shall be fully completed, signed and submitted, as of this date, to: (i) Itaú Corretora de Valores S.A., bookkeeping agent of the shares issued by the Company ("Bookkeeping Agent"); (ii) the custodian agent responsible for the custody of the shares issued by the Company held by the shareholder, if such shareholder holds shares in custody and provided that such agent offers this service ("Custody Agent"); (iii) the central depositary in which the shares are deposited, if its shares are deposited with B3 ("Central Depositary"); or (iv) the Company, directly.

In order for the BVD to be considered valid: (i) the shareholder must indicate above his name (or corporate name) and its CPF or CNPJ number, as applicable, and, in the appropriate field below, the e-mail address for any inquiries; and (ii) the last page must be signed by the shareholder or its legal representative(s), as applicable and under the terms of the legislation in force. The Management Proposal for the AEGM contains detailed instructions regarding the representation of shareholders. If the shareholder is considered a legal entity under Brazilian law, the signature must be made by its legal representatives or attorneys-in-fact duly empowered to do so.

The BVD sent directly to AXIA Energia must observe the procedures, requirements and formalities set forth in the Management Proposal.

BVDs received up to 4 (four) days prior to the date of the AEGM, that is, until April 11, 2026 (inclusive), will be admitted. BVDs received after such deadline will be deemed invalid and will not be processed or considered by the Company for purposes of the resolutions at the AEGM. If necessary, the shareholder may correct or resubmit the BVD and the supporting documents, provided that the Company receives them by the final established deadline.

If the shareholder decides to attend the AEGM and is duly accredited to do so, in person or by proxy, and expressly states the intention to vote in person, the voting instructions submitted through the BVD will be disregarded by the AEGM's board.

Pursuant to Article 6 of the Company's Bylaws, no shareholder or group of shareholders, Brazilian or foreign, public or private, is permitted to exercise voting rights in a number greater than the equivalent of ten percent (10%) of the total number of shares in which AXIA Energia's voting capital is divided, regardless of its interest in the capital stock. The concept of group of shareholders is set forth in Article 8 of the Company's Bylaws.

REMOTE VOTING BALLOT

AGM – CENTRAIS ELET BRAS S.A. – ELETROBRAS to be held on 04/15/2026

Instructions for sending your ballot, indicating the delivery process by sending it directly to the Company or submit voting instruction to the Bookkeeping Agent, the Custody Agent or the Central Depositary

The BVD may be submitted alternatively to: (i) the Bookkeeping Agent; (ii) the Custody Agent, provided that it offers such service; (iii) the Central Depositary; or (iv) the Company, directly.

Shareholders whose shares are registered in the book-entry system may cast their remote vote through the Bookkeeping Agent. In this case, the BVD must be submitted through the Itaú Assembleia Digital website. To do so, it will be necessary to register and have a digital certificate. Information on the registration and step-by-step instructions for issuing the digital certificate are available at: https://assembleiadigital.certificadodigital.com/itausecuritiesservices/artigo/home/assembleia-digital.

The Custody Agent may, but is not obligated to, receive the BVDs from the Company's shareholders. Shareholders are advised to verify with their respective Custody Agent whether it will provide such service, as well as its costs and procedures.

If the shareholder wishes to express its vote directly to the Central Depositary, it must submit its BVD through the electronic system made available by B3, in the "Investor Area" (available at https://www.investidor.b3.com.br/login), in the "Services" section, under the "Open Meetings" option. The Central Depositary may define operational rules and procedures for the organization and functioning of activities related to the collection and transmission of instructions for filling out the BVD, which must be observed by the shareholders.

The Company's shareholders may also, at their sole discretion, complete the BVD through the https://atlasagm.com/ website or through the "Atlas AGM" application available on the Apple Store and Google Play Store ("Application"), in accordance with the Management Proposal. BVDs submitted to the Company by means other than the https://atlasagm.com/ website or the Application will be refused and returned by the Company.

Postal and e-mail address for sending the remote voting ballot, if the shareholder chooses to deliver the document directly to the Company / Instructions on the electronic system for participation in meetings, if such form of participation is allowed

The AEGM will be exclusively digital, to be held through the digital platform of "Atlas AGM" ("Digital Platform"). Shareholders, their representatives or attorneys-in-fact, as applicable, who duly register by 11:59 p.m. on April 13, 2026, and access the Digital Platform by the time of the opening of the meeting, may participate in the AEGM. Detailed information on the rules and procedures for participation via Digital Platform or through submission of the BVD is contained in the Management Proposal for the AEGM, available on the Company's website (https://ri.axia.com.br/), the Brazilian Securities and Exchange Commission's website (https://sistemas.cvm.gov.br/) and B3 S.A. – Brasil, Bolsa, Balcão website (https://www.b3.com.br/pt_br/).

REMOTE VOTING BALLOT

AGM – CENTRAIS ELET BRAS S.A. – ELETROBRAS to be held on 04/15/2026

Indication of the institution hired by the Company to provide the securities bookkeeping service, with name, physical and e-mail address, telephone number and contact person

Itaú Corretora de Valores S.A.

Avenida Brigadeiro Faria Lima, No. 3,500, 3rd floor – São Paulo

Shareholder service:

3003-9285 (capital cities and metropolitan regions)

0800 7209285 (other locations)

Service hours are on business days from 9:00 a.m. to 6:00 p.m.

Email: atendimentoescrituracao@itau-unibanco.com.br

Resolutions / Issues related to the AGM

[Eligible tickers in this resolution: AXIA3 and AXIA7]

1. To review the accounts of management, examine, discuss and vote on the Management Report and the Company's Complete Annual Financial Statements for the fiscal year ended December 31, 2025.