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      <filer>
        <filerCredentials>
          <cik>0001759632</cik>
          <ccc>XXXXXXXX</ccc>
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      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
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  <formData>
    <issuerInfo>
      <issuerCik>0001530950</issuerCik>
      <issuerName>Post Holdings, Inc.</issuerName>
      <secFileNumber>001-35305</secFileNumber>
      <issuerAddress>
        <com:street1>2503 S. HANLEY ROAD</com:street1>
        <com:city>ST. LOUIS</com:city>
        <com:stateOrCountry>MO</com:stateOrCountry>
        <com:zipCode>63144</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>314-644-7600</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>HARPER BRADLY A</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Charles Schwab &amp; Co., Inc.</name>
        <address>
          <com:street1>3000 Schwab Way,</com:street1>
          <com:city>Westlake,</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>76262</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>1965</noOfUnitsSold>
      <aggregateMarketValue>169608.00</aggregateMarketValue>
      <noOfUnitsOutstanding>63740125</noOfUnitsOutstanding>
      <approxSaleDate>05/24/2023</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>11/16/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Lapse</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>POST HOLDINGS, INC.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>556</amountOfSecuritiesAcquired>
      <paymentDate>11/16/2022</paymentDate>
      <natureOfPayment>Equity Compensation</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>11/17/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Lapse</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>POST HOLDINGS, INC.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>1077</amountOfSecuritiesAcquired>
      <paymentDate>11/17/2022</paymentDate>
      <natureOfPayment>Equity Compensation</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>11/30/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Lapse</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>POST HOLDINGS, INC.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>332</amountOfSecuritiesAcquired>
      <paymentDate>11/30/2022</paymentDate>
      <natureOfPayment>Equity Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>05/24/2023</noticeDate>
      <signature>BRADLY A HARPER</signature>
    </noticeSignature>
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144
0001759632
XXXXXXXX
LIVE
0001530950
Post Holdings, Inc.
001-35305
2503 S. HANLEY ROAD
ST. LOUIS
MO
63144
314-644-7600
HARPER BRADLY A
Officer
Common
Charles Schwab & Co., Inc.
3000 Schwab Way,
Westlake,
TX
76262
1965
169608.00
63740125
05/24/2023
NYSE
Common
11/16/2022
Restricted Stock Lapse
POST HOLDINGS, INC.
N
556
11/16/2022
Equity Compensation
Common
11/17/2022
Restricted Stock Lapse
POST HOLDINGS, INC.
N
1077
11/17/2022
Equity Compensation
Common
11/30/2022
Restricted Stock Lapse
POST HOLDINGS, INC.
N
332
11/30/2022
Equity Compensation
Y
05/24/2023
BRADLY A HARPER