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- _____.

In July/26 ( ) ( x ) Group and Related Persons ( x ) Controlling Shareholders ( ) Board of Directors ( ) Management In July/26 ( ) ( x ) Group and Related Persons ( ) Controlling Shareholders ( x ) Board of Directors ( ) Management Class “A” Preferred Share Opening Balance 438.761.574 123.055.912 Quantity Management and Related Persons’ Trading of Securities Issued by the Company Article 11 – CVM Instruction #44/2021 123.055.912 Quantity Common Share Securities/Derivatives Securities Characteristics CONSOLIDATED FORM Share Share ( ) Fiscal Council Class “A” Preferred Share the following transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 no transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 ( ) Technical or Advisory Bodies Opening Balance Management and Related Persons’ Trading of Securities Issued by the Company Article 11 – CVM Resolution #44/2021 Closing Balance Company’s Name: Braskem S.A. 438.761.574 Securities/Derivatives Securities Characteristics Share Common Share Share 1 250 the following transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 no transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 Quantity 1 250 Closing Balance Quantity Company’s Name: Braskem S.A. ( ) Technical or Advisory Bodies Securities/Derivatives Securities Characteristics Share Class “A” Preferred Share Share Common Share Share Class “A” Preferred Share Securities Characteristics Securities/Derivatives Share Common Share ( ) Fiscal Council In July/26 ( ) ( x ) Group and Related Persons ( ) Controlling Shareholders ( x ) Board of Directors ( ) Management In July/26 ( ) ( x ) Group and Related Persons ( ) Controlling Shareholders ( ) Board of Directors (x ) Management Management and Related Persons’ Trading of Securities Issued by the Company Article 11 – CVM Instruction #44/2021 the following transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 no transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 Company’s Name: PETROLEO BRASILEIRO S.A. PETROBRAS ( ) Fiscal Council ( ) Technical or Advisory Bodies Opening Balance Securities/Derivatives Securities Characteristics Quantity Share Common Share 19.557 Share Preferred Share 12.702 Derivatives Structured Transaction Certificates 1 Closing Balance Securities/Derivatives Securities Characteristics Quantity Share Common Share 19.557 Share Preferred Share 12.702 Derivatives Structured Transaction Certificates 1 Management and Related Persons’ Trading of Securities Issued by the Company Article 11 – CVM Instruction #44/2021 the following transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 no transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 Company’s Name: Braskem S.A. ( ) Fiscal Council ( ) Technical or Advisory Bodies Opening Balance Securities/Derivatives Securities Characteristics Quantity Share Class “A” Preferred Share 23.725 Securities/Derivatives Securities Characteristics Quantity Closing Balance Share Class “A” Preferred Share 23.725 In July/26 ( x ) ( ) Group and Related Persons ( ) Controlling Shareholders ( ) Board of Directors (x ) Management In July/26 ( ) ( x ) Group and Related Persons ( ) Controlling Shareholders ( ) Board of Directors ( ) Management Preferred Share 2.714 Preferred Share - Share 813 Closing Balance the following transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 no transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 Company’s Name: Braskem S.A. the following transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 no transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 Quantity 203 813 Quantity 203 ( ) Fiscal Council Securities/Derivatives Securities Characteristics Debentures Debentures Other ( ) Technical or Advisory Bodies Company’s Name: PETROLEO BRASILEIRO S.A. PETROBRAS Opening Balance Management and Related Persons’ Trading of Securities Issued by the Company Article 11 – CVM Instruction #44/2021 Real Estate Receivables Certificates Share Securities Characteristics ( x ) Fiscal Council Securities/Derivatives Securities Characteristics Share Common Share Share Common Share Share Class “A” Preferred Share Share Class “A” Preferred Share Securities/Derivatives Securities Characteristics Closing Balance Quantity ( ) Technical or Advisory Bodies Opening Balance Quantity - - - - Real Estate Receivables Certificates Debentures Debentures Other Securities/Derivatives Management and Related Persons’ Trading of Securities Issued by the Company Article 11 – CVM Instruction #44/2021 In July/26 ( ) ( x ) Group and Related Persons ( ) Controlling Shareholders ( ) Board of Directors ( ) Management In July/26 ( ) ( x ) Group and Related Persons ( ) Controlling Shareholders ( ) Board of Directors ( ) Management Management and Related Persons’ Trading of Securities Issued by the Company Article 11 – CVM Instruction #44/2021 Opening Balance Securities/Derivatives Securities Characteristics Quantity no transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 no transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 Company’s Name: PETROLEO BRASILEIRO S.A. PETROBRAS ( x ) Fiscal Council ( ) Technical or Advisory Bodies Opening Balance Securities/Derivatives Securities Characteristics Quantity Management and Related Persons’ Trading of Securities Issued by the Company Article 11 – CVM Instruction #44/2021 the following transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 Preferred Share 300 Closing Balance Securities/Derivatives Securities Characteristics Quantity Share Share Preferred Share 300 Share Class “A” Preferred Share 5.300 Share Class “A” Preferred Share 5.300 Closing Balance Securities/Derivatives Securities Characteristics Quantity the following transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 Company’s Name: Braskem S.A. ( ) Fiscal Council ( x ) Technical or Advisory Bodies In July/26 ( ) ( x ) Group and Related Persons ( ) Controlling Shareholders ( ) Board of Directors ( ) Management Management and Related Persons’ Trading of Securities Issued by the Company Article 11 – CVM Instruction #44/2021 the following transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 no transactions involving securities and derivatives were executed, pursuant to Article 11 - CVM Instruction #44/2021 Company’s Name: PETROLEO BRASILEIRO S.A. PETROBRAS ( ) Fiscal Council ( x ) Technical or Advisory Bodies Opening Balance Securities/Derivatives Securities Characteristics Quantity Share Preferred Share 10.000 Share Preferred Share 10.000 Closing Balance Securities/Derivatives Securities Characteristics Quantity

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 10, 2026

DISCLAIMER ON FORWARD-LOOKING STATEMENTS

This report on Form 6-K may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are statements that are not historical facts, and are based on our management’s current view and estimates of future economic and other circumstances, industry conditions, company performance and financial results, including any potential or projected impact of the geological event in Alagoas and related legal proceedings and of COVID-19 on our business, financial condition and operating results. The words “anticipates,” “believes,” “estimates,” “expects,” “plans” and similar expressions, as they relate to the company, are intended to identify forward-looking statements. Statements regarding the potential outcome of legal and administrative proceedings, the implementation of principal operating and financing strategies and capital expenditure plans, the direction of future operations and the factors or trends affecting our financial condition, liquidity or results of operations are examples of forward-looking statements. Such statements reflect the current views of our management and are subject to a number of risks and uncertainties, many of which are outside of the our control. There is no guarantee that the expected events, trends or results will actually occur. The statements are based on many assumptions and factors, including general economic and market conditions, industry conditions, and operating factors. Any changes in such assumptions or factors, including the projected impact of the geological event in Alagoas and related legal proceedings and the unprecedented impact of COVID-19 pandemic on our business, employees, service providers, stockholders, investors and other stakeholders, could cause actual results to differ materially from current expectations. Please refer to our annual report on Form 20-F for the year ended December 31, 2019 filed with the SEC, as well as any subsequent filings made by us pursuant to the Exchange Act, each of which is available on the SEC’s website (www.sec.gov), for a full discussion of the risks and other factors that may impact any forward-looking statements in this presentation.