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    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001591397</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001026655</issuerCik>
      <issuerName>CORE MOLDING TECHNOLOGIES INC</issuerName>
      <secFileNumber>001-12505</secFileNumber>
      <issuerAddress>
        <com:street1>800 MANOR PARK DRIVE</com:street1>
        <com:city>COLUMBUS</com:city>
        <com:stateOrCountry>OH</com:stateOrCountry>
        <com:zipCode>43228</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>614-870-5000</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Zimmer John P</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Charles Schwab Corp.</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>37209</noOfUnitsSold>
      <aggregateMarketValue>613018.28</aggregateMarketValue>
      <noOfUnitsOutstanding>8992035</noOfUnitsOutstanding>
      <approxSaleDate>06/02/2025</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>11/09/2021</acquiredDate>
      <natureOfAcquisitionTransaction>Open Market Purchase</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>2500</amountOfSecuritiesAcquired>
      <paymentDate>11/09/2021</paymentDate>
      <natureOfPayment>Cash</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>05/12/2019</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Grant</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>9427</amountOfSecuritiesAcquired>
      <paymentDate>05/12/2019</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>05/17/2019</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Grant</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>6535</amountOfSecuritiesAcquired>
      <paymentDate>05/17/2019</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>09/29/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Grant</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>13093</amountOfSecuritiesAcquired>
      <paymentDate>09/29/2022</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>05/19/2025</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Grant</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>5654</amountOfSecuritiesAcquired>
      <paymentDate>05/19/2025</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>06/02/2025</noticeDate>
      <signature>JOHN PAUL ZIMMER</signature>
    </noticeSignature>
  </formData>
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144
0001591397
XXXXXXXX
LIVE
0001026655
CORE MOLDING TECHNOLOGIES INC
001-12505
800 MANOR PARK DRIVE
COLUMBUS
OH
43228
614-870-5000
Zimmer John P
Officer
Common
Charles Schwab Corp.
3000 Schwab Way
Westlake
TX
76262
37209
613018.28
8992035
06/02/2025
NYSE
Common
11/09/2021
Open Market Purchase
Issuer
N
2500
11/09/2021
Cash
Common
05/12/2019
Restricted Stock Grant
Issuer
N
9427
05/12/2019
N/A
Common
05/17/2019
Restricted Stock Grant
Issuer
N
6535
05/17/2019
N/A
Common
09/29/2022
Restricted Stock Grant
Issuer
N
13093
09/29/2022
N/A
Common
05/19/2025
Restricted Stock Grant
Issuer
N
5654
05/19/2025
N/A
Y
06/02/2025
JOHN PAUL ZIMMER