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- _____.
NOTICE TO THE MARKET
São Paulo,
October 17, 2025 - BRASKEM S.A. (““Braskem” or “Company”) (Ticker B3: BRKM3, BRKM5 and BRKM6; NYSE:
BAK; LATIBEX: XBRK), in continuity with the notice to the market released on September 19, 2024, it hereby informs its shareholders and
the market in general that the Executive Management Committee (Comitê-Executivo de Gestão - “Gecex”) of
the Foreign Trade Chamber (Câmara de Comércio Exterior - “Camex”) approved the maintenance, until October
16, 2026, of the 20% import tax for PE, PP and PVC resins marketed by the Company, through inclusion in the List of Temporary Tariff Increases
due to Conjunctural Trade Imbalances of Camex.
Additional information can be obtained
from the Investor Relations Department by phone at +55 (11) 3576-9531 or by e-mail braskem-ri@braskem.com.br.
SIGNATURES
Pursuant
to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf
by the undersigned, thereunto duly authorized.
Date: October 17, 2025
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BRASKEM S.A. |
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By: |
/s/ Felipe Montoro Jens |
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Name: |
Felipe Montoro Jens |
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Title: |
Chief Financial Officer |
FORWARD-LOOKING
STATEMENTS
This Notice
to the Market may contain forward-looking statements. These statements are not historical facts, but rather are based on the current
view and estimates of the Company's management regarding future economic and other circumstances, industry conditions, financial performance
and results, including any potential or projected impact regarding the geological event in Alagoas and related legal procedures on the
Company's business, financial condition and operating results. The words “project,” “believe,” “estimate,”
“expect,” “plan”, “objective” and other similar expressions, when referring to the Company, are used
to identify forward-looking statements. Statements related to the possible outcome of legal and administrative proceedings, implementation
of operational and financing strategies and investment plans, guidance on future operations, the objective of expanding its efforts to
achieve the sustainable macro objectives disclosed by the Company, as well as factors or trends that affect the financial condition,
liquidity or operating results of the Company are examples of forward-looking statements. Such statements reflect the current views of
the Company's management and are subject to various risks and uncertainties, many of which are beyond the Company’s control. There
is no guarantee that the events, trends or expected results will actually occur. The statements are based on various assumptions and
factors, including, but not limited to, general economic and market conditions, industry conditions and operating factors, availability,
development and financial access to new technologies. Any change in these assumptions or factors, including the projected impact from
the joint venture and its development of technologies, from the geological event in Alagoas and related legal procedures and the unprecedented
impact on businesses, employees, service providers, shareholders, investors and other stakeholders of the Company could cause effective
results to differ significantly from current expectations. For a comprehensive description of the risks and other factors that could
impact any forward-looking statements in this document, especially the factors discussed in the sections, see the reports filed with
the Brazilian Securities and Exchange Commission (CVM). This Notice to the Market does not constitute any offer of securities for sale
in Brazil. No securities may be offered or sold in Brazil without being registered or exempted from registration, and any public offer
of securities carried out in Brazil must be made through a prospectus, which would be made available by Braskem and contain detailed
information on Braskem and its management, as well as its financial statements.