UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 

FORM 6-K

 

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16
OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of April 2026

Commission File Number: 001-40155

Cosan S.A.

(Exact name of registrant as specified in its charter)

 

N/A

(Translation of registrant’s name into English)

 Av. Brigadeiro Faria Lima, 4100, – 16th floor
São Paulo, SP 04538-132 Brazil
(Address of principal executive offices)

 

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F

X

Form 40-F

 

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COSAN S.A.

Publicly Held Company

CNPJ n° 50.746.577/0001-15

NIRE 35.300.177.045 | CVM Code 01983-6

NOTICE TO THE MARKET

 

COSAN S.A. (B3: CSAN3; NYSE: CSAN) (“Cosan” or the “Company”) informs its shareholders and the market in general that, on the date hereof, it filed its annual report on Form 20-F for the fiscal year ended December 31, 2025 with the U.S. Securities and Exchange Commission (SEC).

 

The Form 20-F is available on the SEC website (www.sec.gov) and on the Company’s website (https://www.cosan.com.br/en/).

 

Cosan’s shareholders may receive a hard copy of the 20-F, which contains the Company’s complete audited financial statements, free of charge, upon request. Requests should be directed to:

Investor Relations, Cosan S.A.

Av. Brigadeiro Faria Lima, 4,100 – 16th floor

São Paulo, SP 04538-132 Brazil

+55 (11) 3897-9797

ri@cosan.com

 

São Paulo, April 10, 2026

 Rafael Bergman

Chief Financial and Investor Relations Officer