[6-K] BRASKEM SA Current Report (Foreign Issuer)

Q: When is Braskem’s EGM and how will it be held?

The EGM is on November 13, 2025 , at 3:00 p.m. , and will be conducted exclusively digitally under CVM Resolution 81 .

Q: How can Braskem shareholders submit remote votes?

They may send ballots directly to the Company at braskem-ri@braskem.com or via the central depository, custody agents, or Itaú Corretora de Valores S.A. at atendimentoescrituracao@itau-unibanco.com.br .

Q: What are the formal requirements for the distance voting ballot?

The ballot must be fully completed , all pages initialed , and signed by the shareholder or authorized representative.

Q: Where can shareholders find the management proposal and materials?

They are available at the Company’s São Paulo office, on http://www.braskem-ri.com.br , the CVM website, and B3 .

Q: Which institution handles Braskem’s share bookkeeping?

The bookkeeping agent is Itaú Corretora de Valores S.A. , with online access via https://www.itau.com.br/investmentservices/assembleia-digital/ .

Filing Impact

(Low)

Filing Sentiment

(Neutral)

Form Type

6-K

Rhea-AI Filing Summary

Braskem S.A. (BAK) furnished a Form 6-K providing the distance voting ballot for its Extraordinary General Meeting to be held on November 13, 2025, at 3:00 p.m., to be conducted in an exclusively digital format under CVM Resolution 81.

Shareholders may submit remote voting instructions directly to the Company (braskem-ri@braskem.com) or through service providers, including the central depository, custody agents, or Itaú Corretora de Valores S.A. (atendimentoescrituracao@itau-unibanco.com.br). The ballot must be fully completed, all pages initialed, and signed by the shareholder or authorized representative. The management proposal and related materials are available at the Company’s office, its investor relations website, the CVM website, and B3.

10/14/2025 - 06:12 AM

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 October, 2025

(Commission File No. 1-14862 )

BRASKEM S.A.

(Exact Name as Specified in its Charter)

N/A

(Translation of registrant's name into English)

Rua Eteno, 1561, Polo Petroquimico de Camacari
Camacari, Bahia - CEP 42810-000 Brazil

(Address of principal executive offices)

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 if the registrant is submitting the Form 6-K
in paper as permitted by Regulation S-T Rule 101(b)(1). _____

Indicate by check mark if the registrant is submitting the Form 6-K
in paper as permitted by Regulation S-T Rule 101(b)(7). _____

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___

If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82- _____.

DISTANCE VOTING BALLOT

EGM – BRASKEM S.A. TO BE HELD ON 11/13/2025

Shareholder's Name:

Shareholder's CNPJ or CPF:

E-mail:

Instructions on how to cast your vote:

This remote voting ballot (“Ballot”) must be filled in if the shareholder of Braskem S.A. (“Company”) chooses to exercise his or her right to vote remotely, under the terms of Brazilian Securities and Exchange Commission (“CVM”) Resolution 81, of March 29, 2022 (“CVM Resolution 81”). In this case, it is essential that the fields above are filled in with the full name (or corporate name) of the Company’s shareholder (“Shareholder”) and their registration number with the Ministry of Finance, either as a legal entity (CNPJ) or as an individual (CPF), as well as an e-mail address for possible contact.

In addition, for this Ballot to be considered valid and the votes cast therein to be counted towards the quorum of the Company’s Extraordinary General Meeting to be held on November 13, 2025, at 3:00 p.m., in exclusively digital form, pursuant to article 5, paragraph 2, item I and article 28, paragraphs 2 and 3 of CVM Resolution 81 (“Meeting”), the following instructions must be observed:

a. all fields must be duly filled in;

b. all pages must be initialed; and

c. at the end, the Shareholder or his/her legal representative(s), as the case may be and in accordance with current legislation and regulations, must sign the Ballot.

Delivery guidelines, indicating the option to either send directly to the Company or to send completion instructions to the central depository, the bookkeeping agent, or the custodian:

The Shareholder may transmit the instructions for completing the Ballot: (a) directly to the Company (Rua Lemos Monteiro, No. 120, 24th floor, Butantã, City of São Paulo, State of São Paulo, ZIP Code 05501-050), to the attention of the Investor Relations Department, addressed to Ms. Rosana Cristina Avolio, and/or via email to braskem-ri@braskem.com, with a request for confirmation of receipt; or (b) to service providers qualified to collect and transmit instructions for completing the Voting Bulletin, namely: (i) the central depository where the shares are held; (ii) the Shareholder’s custody agents, if the shares are held in a central depository; or (iii) Itaú Corretora de Valores S.A., as the financial institution contracted by the Company to provide securities bookkeeping services, if the shares are not held in a central depository (Avenida Brigadeiro Faria Lima, No. 3,500, 3rd floor, São Paulo, ZIP Code 04538-132 and/or via email to atendimentoescrituracao@itauunibanco.com.br, or through the website https://www.itau.com.br/investmentservices/assembleiadigital/ | Shareholder service phone: 3003-9285 (for capitals and metropolitan regions) or 0800 720-9285 (for other locations)).

1. Submission of the Ballot directly to the Company:

DISTANCE VOTING BALLOT

EGM – BRASKEM S.A. TO BE HELD ON 11/13/2025

Shareholders who choose to exercise their right to vote remotely by submitting the Ballot directly to the Company, pursuant to item (a) above, must send the following documents to the email address braskem-ri@braskem.com, with a request for confirmation of receipt: (i) the Ballot duly completed, initialed on all pages, and signed (including the possibility of signing via digital certificate); (ii) a statement of their shareholding position, issued by the custodian institution or by the bookkeeping agent of the Company’s shares, depending on whether the shares are held in a central depository or not; and (iii) a copy of the following documents:

· for individuals: photo ID and CPF of the Shareholder (and, in the case of a proxy, the power of attorney, as well as the proxy’s own identification documents);

· for legal entities: articles of incorporation or bylaws, minutes of election of the Board of Directors (if applicable), and minutes of election of the Executive Officers that include the appointment of the legal representative(s) attending the Shareholders’ Meeting, as well as photo ID and CPF of such legal representative(s); and, in the case of a proxy, the power of attorney and the proxy’s own identification documents; and

· for investment funds: fund regulations and the articles of incorporation or bylaws of the fund’s administrator, minutes of election of the legal representative(s) attending the Shareholders’ Meeting, as well as photo ID and CPF of such representative(s); and, in the case of a proxy, the power of attorney and the proxy’s own identification documents.

The following identity documents will be accepted, provided they include a photo: RG, RNE, CNH, Passport, or officially recognized professional class cards.

The Company clarifies that it will waive the requirement to send physical copies of the Shareholder representation documents to the Company’s office, as well as the notarization, consularization, apostille, and sworn translation of all representation documents. A simple copy of the original documents sent to the Company’s email address mentioned above will suffice.

The Company does not accept powers of attorney granted electronically by Shareholders (i.e., powers of attorney signed digitally without any digital certification).

Pursuant to Article 27, I of CVM Resolution 81, the remote voting Ballot must be received by the Company no later than four (4) days prior to the date of the Shareholders’ Meeting, i.e., by November 09, 2025 (inclusive). Any Ballot received after this date will be disregarded.

In accordance with Article 46 of CVM Resolution 81, the Company will notify the Shareholder who submitted the Ballot within three (3) days of receipt whether the documents received are satisfactory for the votes to be considered valid, or, if necessary, the procedures and deadlines for any correction or resubmission of the Ballot. Any correction or resubmission must be made by the final deadline for submission, i.e., November 09, 2025 (inclusive).

2. Submission of the Ballot via service providers:

DISTANCE VOTING BALLOT

EGM – BRASKEM S.A. TO BE HELD ON 11/13/2025

Shareholders who choose to exercise their right to vote remotely through service providers must transmit their voting instructions to the central depository where the shares are held, to their respective custody agents, or to the bookkeeping agent of the Company’s shares, in accordance with the rules established by such entities. To do so, Shareholders must contact the central depository, their custody agents, or the bookkeeping agent, depending on whether their shares are held in a central depository, and verify the procedures established by them for issuing voting instructions via the Ballot, as well as the documents, deadlines, and information required for such purpose.

Postal and electronic address for submission of the distance voting Ballot, in case the shareholder wishes to deliver the document directly to the Company / Guidelines regarding the electronic system for participation in the shareholders’ meeting, if such form of participation is admitted:

As previously mentioned in the item above, the Shareholder must send their Ballot to the following address: Rua Lemos Monteiro, No. 120, 24th floor, Butantã, City of São Paulo, State of São Paulo, ZIP Code 05501-050, to the attention of the Investor Relations Department, addressed to Ms. Rosana Cristina Avolio, and/or send it via email to braskem-ri@braskem.com, with a request for confirmation of receipt.

It is also worth noting that the Management Proposal of the Company, including the information and documents required under CVM Resolution 81, is available to Shareholders at the Company’s office located in the State of São Paulo, City of São Paulo, at Rua Lemos Monteiro, No. 120, 24th floor, Butantã, ZIP Code 05501-050, on its website (http://www.braskem-ri.com.br), on the CVM website (www.cvm.gov.br), and on the website of B3 S.A. – Brasil, Bolsa, Balcão (“B3”) (www.b3.com.br).

Identification of the institution contracted by the Company to provide securities bookkeeping services, including name, physical and electronic address, telephone number, and contact person:

As previously mentioned in the item above, the Shareholder must send their Ballot to the following address: Avenida Brigadeiro Faria Lima, No. 3,500, 3rd floor, São Paulo, ZIP Code 04538-132, and/or via email to atendimentoescrituracao@itau-unibanco.com.br, or through the website: https://www.itau.com.br/investmentservices/assembleia-digital/.

The Shareholder service phone numbers are: 3003-9285 (for capitals and metropolitan regions) or 0800 720-9285 (for other locations).

DISTANCE VOTING BALLOT

EGM – BRASKEM S.A. TO BE HELD ON 11/13/2025

Resolutions/Matters related to the Extraordinary Shareholders’ Meeting (EGM):

Ordinary Resolution