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      <issuerName>CORE MOLDING TECHNOLOGIES INC</issuerName>
      <secFileNumber>001-12505</secFileNumber>
      <issuerAddress>
        <com:street1>800 MANOR PARK DRIVE</com:street1>
        <com:street2>P O BOX 28183</com:street2>
        <com:city>COLUMBUS</com:city>
        <com:stateOrCountry>OH</com:stateOrCountry>
        <com:zipCode>43228</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>8006666960</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Zimmer John P</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
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    <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>30000</noOfUnitsSold>
      <aggregateMarketValue>821100.00</aggregateMarketValue>
      <noOfUnitsOutstanding>9001199</noOfUnitsOutstanding>
      <approxSaleDate>09/05/2023</approxSaleDate>
      <securitiesExchangeName>NYSE</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>06/27/2023</acquiredDate>
      <natureOfAcquisitionTransaction>Open Market</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Open Market</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>2500</amountOfSecuritiesAcquired>
      <paymentDate>06/27/2023</paymentDate>
      <natureOfPayment>Cash</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>08/05/2023</acquiredDate>
      <natureOfAcquisitionTransaction>Exercised Stock Right</natureOfAcquisitionTransaction>
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      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>8975</amountOfSecuritiesAcquired>
      <paymentDate>08/10/2023</paymentDate>
      <natureOfPayment>Equity Compensation</natureOfPayment>
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    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>05/12/2017</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Units</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Core Molding Technologies Inc.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>11041</amountOfSecuritiesAcquired>
      <paymentDate>05/12/2017</paymentDate>
      <natureOfPayment>Equity Compensation</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>01/13/2017</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Units</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Core Molding Technologies Inc.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>7484</amountOfSecuritiesAcquired>
      <paymentDate>01/13/2017</paymentDate>
      <natureOfPayment>Equity Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>09/05/2023</noticeDate>
      <signature>John P. Zimmer</signature>
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144
0001591397
XXXXXXXX
LIVE
0001026655
CORE MOLDING TECHNOLOGIES INC
001-12505
800 MANOR PARK DRIVE
P O BOX 28183
COLUMBUS
OH
43228
8006666960
Zimmer John P
Officer
Common
Charles Schwab Corp
3000 SCHWAB WAY
WESTLAKE
TX
76262
30000
821100.00
9001199
09/05/2023
NYSE
Common
06/27/2023
Open Market
Open Market
N
2500
06/27/2023
Cash
Common
08/05/2023
Exercised Stock Right
Core Molding Technologies Inc.
N
8975
08/10/2023
Equity Compensation
Common
05/12/2017
Restricted Stock Units
Core Molding Technologies Inc.
N
11041
05/12/2017
Equity Compensation
Common
01/13/2017
Restricted Stock Units
Core Molding Technologies Inc.
N
7484
01/13/2017
Equity Compensation
Y
09/05/2023
John P. Zimmer