MATERIAL FACT (Form 6-K)

BRASKEM S.A.

Corporate Taxpayer ID (CNPJ): 42.150.391/0001-70

Company Registry: 29.300.006.939

Publicly Held Company

MATERIAL FACT

Braskem S.A. ("Braskem" or the "Company") (B3: BRKM3, BRKM5 and BRKM6; NYSE: BAK; LATIBEX: XBRK), in continuity with the Material Fact disclosed on December 23, 2025, hereby informs its shareholders and the market in general that it became aware, through the website of the Administrative Council for Economic Defense (CADE), that CADE's General Superintendence (Superintendência Geral) issued a Decision (Despacho), through which it decided to approve, without restrictions, the Concentration Act related to the potential transaction involving the entry of a certain Private Equity Investment Fund (Fundo de Investimento em Participações, "FIP"), under the specialized consulting of IG4 Sol Ltda. (part of the IG4 Group), as a direct and/or indirect shareholder of the Company, by assuming the equity interest currently held by Novonor S.A. - Em Recuperação Judicial ("Novonor"), as a result of the acquisition, by Shine I Fundo de Investimento em Direitos Creditórios de Responsabilidade Limitada ("Shine I FIDC"), of certain credits against companies of the Novonor Group, currently secured by a fiduciary assignment of Braskem shares (the "Transaction").

Upon publication of such Decision, a 15-day period for a potential review by CADE's Tribunal will commence.

Any additional information that may be received by the Company from Novonor, the FIP or Shine I FIDC regarding the potential Transaction, including with respect to the conditions precedent to its closing, will be disclosed by Braskem to the market in accordance with the applicable laws and regulations.

Additional information can be obtained from the Investor Relations Department by calling +55 11 3576 9531 or by e-mail [email protected].

São Paulo, March 6, 2026.

Felipe Montoro Jens

Chief Financial and Investor Relations Officer

Braskem S.A.