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 June, 2026
(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, June 29, 2026
- BRASKEM S.A. ("Braskem" or "Company") (Ticker B3: BRKM3, BRKM5 and BRKM6; NYSE: BAK; LATIBEX: XBRK) hereby informs
its shareholders and the market in general that the credit rating agencies Fitch Ratings and S&P Global Ratings have revised the Company's
corporate credit rating on a global scale to C and D, respectively in connection with the Precautionary Injunctive Relief proceeding (Tutela
de Urgência Cautelar) filed by the Company and certain of its subsidiaries, as disclosed in the Material Facts of June 25 and
26, 2026.
Braskem reiterates that the Injunctive
Relief and the Mediation have a limited scope, strictly financial, and do not encompass any obligations of the Company and its subsidiaries
with their suppliers, customers, and other stakeholders, which remain in full force and effect and continue to be performed in the ordinary
course, pursuant to the terms of the respective agreements.
The Company will keep the market informed
of any material developments on this matter, in compliance with applicable laws and regulations.
For more information, contact Braskem’s
Investor Relations Department by calling +55 (11) 3576-9531 or sending an e-mail to 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: June 29, 2026
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BRASKEM S.A. |
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By: |
/s/ Carlos Augusto Machado Pereira de Almeida Brandão |
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Name: |
Carlos Augusto Machado Pereira de Almeida Brandão |
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Title: |
Chief Financial Officer |
DISCLAIMER ON 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.