CSANY 6-K
Cosan S.A. (CSANY)
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K
Report of Foreign Issuer
Pursuant To Rule 13a-16 Or 15d-16 of the
Securities Exchange Act of 1934
For the month of August 2026
Commission File Number: 333-251238
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COSAN S.A.
(Exact name of registrant as specified in its charter)
N/A
(Translation of registrant’s name into English)
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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 ☒ 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):
Yes ☐ No ☒
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):
Yes ☐ No ☒
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COSAN S.A.
CNPJ nº 50.746.577/0001-15
NIRE 35.300.177.045
Publicly Held Company
CVM Code 01983-6
MATERIAL FACT
COSAN S.A. (B3: CSAN3; NYSE: CSAN) (“Cosan” or the “Company”), in compliance with Brazilian Securities and Exchange Commission (“CVM”) Resolution No. 44/2021 and further to the Notice to the Market disclosed on June 29, 2026, hereby informs its shareholders and the market in general that, in line with its deleveraging strategy, it has continued to advance the process of evaluating alternatives for the sale of a portion of its equity interest in Rumo S.A. (“Rumo”).
As reported in recent media articles, such process is in the phase of submission, by potential interested parties, of binding proposals. The Company has not made any decision, to date, regarding the execution of a transaction involving its stake in Rumo.
The Company will keep the market informed of any material developments related to this process.
São Paulo, August 20, 2026.
Rafael Bergman
Chief Financial and Investor Relations Officer
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 20, 2026
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COSAN S.A. |
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By: |
/s/ Rafael Bergman |
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Name: Rafael Bergman |
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Title: Chief Financial Officer |
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