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      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001983635</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
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      <issuerInfo>
        <issuerCik>0001430162</issuerCik>
        <issuerName>Cosan S.A.</issuerName>
        <secFileNumber>001-40155</secFileNumber>
        <issuerAddress>
          <com:street1>AV. BRIGADEIRO FARIA LIMA</com:street1>
          <com:street2>4100, 16TH FLOOR</com:street2>
          <com:city>SAO PAULO, SP</com:city>
          <com:stateOrCountry>D5</com:stateOrCountry>
          <com:zipCode>04538-132</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>55-11-3897-9797</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Palania Corp</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Director</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>ADR</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Citi Global Markets, Inc.</name>
          <address>
            <com:street1>388 Greenwich Street</com:street1>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10013</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>256723</noOfUnitsSold>
        <aggregateMarketValue>3155725.00</aggregateMarketValue>
        <noOfUnitsOutstanding>1874070932</noOfUnitsOutstanding>
        <approxSaleDate>04/02/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>ADR</securitiesClassTitle>
        <acquiredDate>04/02/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Company Benefit Plan</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>256723</amountOfSecuritiesAcquired>
        <paymentDate>04/02/2022</paymentDate>
        <natureOfPayment>Services Rendered</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Palania Corp.</name>
          <address>
            <com:street1>AV. Brigadeiro Faria Lima</com:street1>
            <com:street2>4100, 16th Floor</com:street2>
            <com:city>Sao Paulo</com:city>
            <com:stateOrCountry>D5</com:stateOrCountry>
            <com:zipCode>04538-132</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>ADR</securitiesClassTitle>
        <saleDate>04/01/2024</saleDate>
        <amountOfSecuritiesSold>38241</amountOfSecuritiesSold>
        <grossProceeds>475981.00</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>04/02/2024</noticeDate>
        <signature>/s/ Marcelo Martins</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
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text: 144
  0001983635
  XXXXXXXX
  LIVE
  0001430162
  Cosan S.A.
  001-40155
  AV. BRIGADEIRO FARIA LIMA
  4100, 16TH FLOOR
  SAO PAULO, SP
  D5
  04538-132
  55-11-3897-9797
  Palania Corp
  Director
  ADR
  Citi Global Markets, Inc.
  388 Greenwich Street
  New York
  NY
  10013
  256723
  3155725.00
  1874070932
  04/02/2024
  NYSE
  ADR
  04/02/2022
  Company Benefit Plan
  Issuer
  N
  256723
  04/02/2022
  Services Rendered
  N
  Palania Corp.
  AV. Brigadeiro Faria Lima
  4100, 16th Floor
  Sao Paulo
  D5
  04538-132
  ADR
  04/01/2024
  38241
  475981.00
  04/02/2024
  /s/ Marcelo Martins