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                               September 23, 2022

       Ricardo Lewin
       Chief Financial Officer
       Cosan S.A.
       Av. Brigadeiro Faria Lima, 4,100     16th floor
       S  o Paulo     SP, 04538-132, Brazil

                                                        Re: Cosan S.A.
                                                            Form 20-F for the
Fiscal Year Ended December 31, 2021
                                                            Filed May 16, 2022
                                                            Form 6-K
                                                            Filed August 12,
2022
                                                            File No. 001-40155

       Dear Mr. Lewin:

              We have limited our review of your filings to the financial
statements and related
       disclosures and have the following comments. In some of our comments, we
may ask you to
       provide us with information so we may better understand your disclosure.

              Please respond to these comments within ten business days by
providing the requested
       information or advise us as soon as possible when you will respond. If
you do not believe our
       comments apply to your facts and circumstances, please tell us why in
your response.

                                                        After reviewing your
response to these comments, we may have additional comments.

       Form 20-F for the Fiscal Year Ended December 31, 2021

       A. Operating Results
       Results of Operations for the Fiscal Year Ended December 31, 2021
Compared to the Fiscal
       Year Ended December 31, 2020, page 122

   1.                                                   When several factors
attribute to material fluctuations in your results of operations, please
                                                        quantify in your
reporting currency each factor cited so that investors may understand the
                                                        magnitude and relative
impact of each factor. For example, in your discussion of the
                                                        change from 2019 to
2020 of Gas and Power selling expenses, you state that this decrease
                                                        was primarily due to a
decrease of 20% in employee-related expenses partially offset by
                                                        an increase of R$12.7
million in the provision for expected credit losses. While the
                                                        percentage decrease in
a factor contributing to the decrease is supplementally helpful, it is
                                                        unclear how this
relates in size to the R12.7 million increase cited. Refer to Item 303 of
 Ricardo Lewin
FirstName
Cosan S.A.LastNameRicardo Lewin
Comapany 23,
September NameCosan
              2022    S.A.
September
Page 2    23, 2022 Page 2
FirstName LastName
         Regulation S-K.
Item 5. Operating and Financial Review and Prospects
B. Liquidity and Capital Resources
Cash Flows, page 139

2.       Your disclosure appears to focus on how net cash used in operating
activities was derived
         for each period as presented in the statement of cash flows. Pursuant
to Item 303 of
         Regulation S-K, your discussion should be an analysis of why operating
cash changed
         from period to period. In performing your analysis, note that
references to results, noncash
         items, and working capital items may not provide a sufficient basis to
understand how
         operating cash actually was affected between periods. Refer to the
introductory paragraph
         of section IV.B and paragraph B.1 of Release No. 33-8350 for guidance.
Please revise
         your disclosure as appropriate.
Consolidated Financial Statements
Consolidated Statement of Changes in Equity, page F-15

3.       Please tell us how you determined or calculated each of the
Predecessor Adjustments
         presented in the Consolidated Statement of Changes in Equity.
General

4.       We note from your disclosure on page 3 that, in the first quarter of
2022, you revised your
         intangible asset policy for natural gas distribution concession
contracts and reclassified the
         balances of amortization expenses from selling, general and
administrative expenses to
         cost of sales for the years ended December 31, 2021, 2020 and 2019.
Please tell us how
         you evaluated this change as a change in accounting policy versus
correction of an error.
         Refer to the guidance in IAS 8.
Form 6-K filed August 12, 2022 - Interim Financial Statements for the Quarterly
Period Ended
June 30, 2022

Statement of Changes in Equity, page 11

5.       We note the capital distribution of $1,400,557 in your statement of
changes in equity.
         Please either confirm to us that this is a treasury stock transaction
or tell us what this
         represents as the description appears to be blank.
Form 6-K filed August 12, 2022 - Earnings Release for the Quarterly Period
Ended June 30,
2022

Executive Summary for 2Q22, page 1

6.       Please tell us why your earnings release presents Adjusted EBITDA as
the segment
         measure of profit or loss while your annual and interim financial
statements specifically
 Ricardo Lewin
Cosan S.A.
September 23, 2022
Page 3
         identify EBITDA as this measure.
C.2 Rumo, page 6

7.       Please tell us why you have only presented and discussed comparative
results for 2Q22 to
         2Q21 for Rumo when you also present comparative results for 2Q22 to
1Q22 for your
         other segments.
       In closing, we remind you that the company and its management are
responsible for the
accuracy and adequacy of their disclosures, notwithstanding any review,
comments, action or
absence of action by the staff.

       You may contact Amy Geddes at 202-551-3304 or Stephen Kim at
202-551-3291 with
any questions.



FirstName LastNameRicardo Lewin                              Sincerely,
Comapany NameCosan S.A.
                                                             Division of
Corporation Finance
September 23, 2022 Page 3                                    Office of Trade &
Services
FirstName LastName