Cosan S A : 23 DecNotice to Shareholders - Dividend Distribution Rectification

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COSAN S.A.

Corporate Taxpayer ID (CNPJ/MF): 50.746.577/0001-15

Company Registry (NIRE): 35.300.177.045

Publicly Held Company

CVM 19836

NOTICE TO SHAREHOLDERS

Cosan S.A. (B3: CSAN3; NYSE: CSAN) ("Cosan" or the "Company") announces to its Shareholders that the Board of Directors amended on this date the amount to be distributed to the Company's shareholders as interim dividends, previously approved on December 7, 2021, now being R$700,024,527.67 (seven hundred million, twenty-fourthousand, five hundred and twenty-sevenreais and sixty-sevencents), with no change in the amount distributed per common share and other information disclosed in the Notice to Shareholders released on December 7, 2021. The interim dividends will remain in accordance with the following terms:

1. Shareholders will receive interim dividends, based on the balance sheet ended on September 30, 2021, in the total amount of R$700,024,527.67 (seven hundred million, twenty-four thousand, five hundred and twenty-seven reais and sixty-seven cents), corresponding to R$ 0.374619350 per common share, excluding treasury shares, with no withholding of income tax at source;
2. The dividends were based on shareholder positions as of December 14, 2021, and as of December 15, 2021 the Company's shares under the ticker
   "CSAN3" were traded "ex" dividends;
3. The dividends will be paid on December 28, 2021; and
4. The corresponding credit will be made individually to each shareholder based on the shareholdings referred to in item (ii) above.

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Shareholders with shares held in custody will have their dividends credited based on the procedure adopted by the Stock Exchanges. In the case of shareholders whose registry information does not include their Individual/Corporate Taxpayer Number (CPF/CNPJ) or their bank account information (bank, branch and account number), the dividends will be credited as of the third business day as from the date of the request for updating the registry, provided that shareholders normalize their registry information in person at a branch of Itaú Unibanco S/A.

American Depositary Shares (ADSs)

For holders of American Depositary Shares (ADSs) negotiated on the New York Stock Exchange (NYSE), the payment will be made by J.P. Morgan Chase Bank NA (JPM), depositary bank of Cosan's ADSs. Information and clarifications may be obtained at www.adr.com or from JPM.

São Paulo, December 23, 2021.

MARCELO EDUARDO MARTINS

Chief Financial and Investor Relations Officer

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