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 August, 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, August
17, 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 agency Fitch Ratings has revised the Company's global
corporate credit rating to RD, in connection with the non-payment of certain financial obligations following the expiration of the contractually
agreed cure period, as disclosed by the Company in its Quarterly Information as of June 30, 2026.
In addition, as disclosed
in the Material Facts published on June 25 and 26, 2026, in connection with the request for Precautionary Injunctive Relief (Tutela de
Urgência Cautelar) filed by the Company and certain of its subsidiaries, the 2nd Bankruptcy and Judicial Reorganization Court of
the Judicial District of the Capital of the State of São Paulo (2ª Vara de Falências e Recuperações Judiciais
da Comarca da Capital do Estado de São Paulo) has granted the requests, among other measures, order the stay of all enforcement
actions and attachments by creditors that have been invited to participate in the mediation proceeding initiated by the Company and certain
of its subsidiaries, for a period of 60 days, including with respect to the financial obligations mentioned above.
Braskem reiterates that
it remains fully committed to continuing discussions with its financial creditors in pursuit of a consensual, structural and orderly solution
for its capital structure, while ensuring the continuity of its operations in the ordinary course of business.
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: August 17, 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.