content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <!-- Generated by Workiva -->
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001430466</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001756262</issuerCik>
        <issuerName>TransMedics Group, Inc.</issuerName>
        <secFileNumber>001-38891</secFileNumber>
        <issuerAddress>
          <com:street1>200 Minuteman Road</com:street1>
          <com:city>Andover</com:city>
          <com:stateOrCountry>MA</com:stateOrCountry>
          <com:zipCode>01810</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>978-552-0900</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Waleed H. Hassanein</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Director</relationshipToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>J.P. Morgan Securities LLC</name>
          <address>
            <com:street1>390 Madison Avenue, 6th Floor</com:street1>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10017</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>25875</noOfUnitsSold>
        <aggregateMarketValue>4219695</aggregateMarketValue>
        <noOfUnitsOutstanding>33759363</noOfUnitsOutstanding>
        <approxSaleDate>08/15/2024</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>08/15/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Stock Option Exercise</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>25875</amountOfSecuritiesAcquired>
        <paymentDate>08/15/2024</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Waleed H. Hassanein</name>
          <address>
            <com:street1>C/o TransMedics Group, Inc.</com:street1>
            <com:street2>200 Minuteman Road</com:street2>
            <com:city>Andover</com:city>
            <com:stateOrCountry>MA</com:stateOrCountry>
            <com:zipCode>01810</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <saleDate>06/14/2024</saleDate>
        <amountOfSecuritiesSold>8625</amountOfSecuritiesSold>
        <grossProceeds>1223483.88</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Waleed H. Hassanein</name>
          <address>
            <com:street1>C/o TransMedics Group, Inc.</com:street1>
            <com:street2>200 Minuteman Road</com:street2>
            <com:city>Andover</com:city>
            <com:stateOrCountry>MA</com:stateOrCountry>
            <com:zipCode>01810</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <saleDate>07/15/2024</saleDate>
        <amountOfSecuritiesSold>8625</amountOfSecuritiesSold>
        <grossProceeds>1252066.88</grossProceeds>
      </securitiesSoldInPast3Months>
      <remarks>The shares covered by this filing are stock options that will be exercised within 3 months from the date of this filing.</remarks>
      <noticeSignature>
        <noticeDate>08/15/2024</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>09/06/2023</planAdoptionDate>
        </planAdoptionDates>
        <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Waleed H. Hassanein</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4465}]
text: 144
  0001430466
  XXXXXXXX
  LIVE
  0001756262
  TransMedics Group, Inc.
  001-38891
  200 Minuteman Road
  Andover
  MA
  01810
  978-552-0900
  Waleed H. Hassanein
  Director
  Officer
  Common Stock
  J.P. Morgan Securities LLC
  390 Madison Avenue, 6th Floor
  New York
  NY
  10017
  25875
  4219695
  33759363
  08/15/2024
  NASDAQ
  Common Stock
  08/15/2024
  Stock Option Exercise
  Issuer
  N
  25875
  08/15/2024
  Cash
  N
  Waleed H. Hassanein
  C/o TransMedics Group, Inc.
  200 Minuteman Road
  Andover
  MA
  01810
  Common Stock
  06/14/2024
  8625
  1223483.88
  Waleed H. Hassanein
  C/o TransMedics Group, Inc.
  200 Minuteman Road
  Andover
  MA
  01810
  Common Stock
  07/15/2024
  8625
  1252066.88
  The shares covered by this filing are stock options that will be exercised within 3 months from the date of this filing.
  08/15/2024
  09/06/2023
  /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Waleed H. Hassanein