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



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    <issuerInfo>
      <issuerCik>0001038357</issuerCik>
      <issuerName>PIONEER NATURAL RESOURCES CO</issuerName>
      <secFileNumber>001-13245</secFileNumber>
      <issuerAddress>
        <com:street1>777 HIDDEN RIDGE</com:street1>
        <com:city>IRVING</com:city>
        <com:stateOrCountry>TX</com:stateOrCountry>
        <com:zipCode>75038</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>9724449001</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>BERG MARK STEPHEN</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Member of immediate family of any of the foregoing</relationshipToIssuer>
        <relationshipToIssuer>FRAN DUBROW BERG TTEE SPOUSE OF MARK STEPHEN BERG</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>7323</noOfUnitsSold>
      <aggregateMarketValue>1759455.00</aggregateMarketValue>
      <noOfUnitsOutstanding>233623121</noOfUnitsOutstanding>
      <approxSaleDate>03/07/2024</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>02/21/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Lapse</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>PIONEER NATURAL RESOURCES COMPANY</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>7323</amountOfSecuritiesAcquired>
      <paymentDate>02/21/2022</paymentDate>
      <natureOfPayment>Equity Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <remarks>Shares sold in FDB LIFETIME ACCESS TRUST account.</remarks>
    <noticeSignature>
      <noticeDate>03/07/2024</noticeDate>
      <signature>FRAN DUBROW BERG TTEE</signature>
    </noticeSignature>
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144
0001238881
XXXXXXXX
LIVE
0001038357
PIONEER NATURAL RESOURCES CO
001-13245
777 HIDDEN RIDGE
IRVING
TX
75038
9724449001
BERG MARK STEPHEN
Member of immediate family of any of the foregoing
FRAN DUBROW BERG TTEE SPOUSE OF MARK STEPHEN BERG
Common
Charles Schwab & Co., Inc.
3000 Schwab Way
Westlake
TX
76262
7323
1759455.00
233623121
03/07/2024
NYSE
Common
02/21/2022
Restricted Stock Lapse
PIONEER NATURAL RESOURCES COMPANY
N
7323
02/21/2022
Equity Compensation
Y
Shares sold in FDB LIFETIME ACCESS TRUST account.
03/07/2024
FRAN DUBROW BERG TTEE