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          <com:city>GAITHERSBURG</com:city>
          <com:stateOrCountry>MD</com:stateOrCountry>
          <com:zipCode>20878</com:zipCode>
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        <issuerContactPhone>301-825-9810</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Roemer Alan S.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Director</relationshipToIssuer>
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        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Rockefeller Financial LLC</name>
          <address>
            <com:street1>45 Rockefeller Plaza</com:street1>
            <com:street2>Floor 5</com:street2>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10111</com:zipCode>
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        <noOfUnitsOutstanding>13852870</noOfUnitsOutstanding>
        <approxSaleDate>11/21/2023</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
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        <natureOfAcquisitionTransaction>Private Placement</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Neximmune Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>5119</amountOfSecuritiesAcquired>
        <paymentDate>02/17/2021</paymentDate>
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        <isGiftTransaction>N</isGiftTransaction>
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        <paymentDate>12/21/2021</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
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      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>11/21/2023</noticeDate>
        <signature>Jason Coleman as a duly authorized representative of National Financial Services LLC, as attorney-in-fact for Alan S. Roemer</signature>
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text: 144
  0001643070
  XXXXXXXX
  LIVE
  0001538210
  NexImmune, Inc.
  001-40045
  9119 GAITHER ROAD
  GAITHERSBURG
  MD
  20878
  301-825-9810
  Roemer Alan S.
  Director
  Common
  Rockefeller Financial LLC
  45 Rockefeller Plaza
  Floor 5
  New York
  NY
  10111
  7825
  16354.00
  13852870
  11/21/2023
  NASDAQ
  common
  02/17/2021
  Private Placement
  Neximmune Inc
  N
  5119
  02/17/2021
  N/A
  Common
  12/21/2021
  Stock Option Exercise
  Neximmune
  N
  2706
  12/21/2021
  Cash
  Y
  11/21/2023
  Jason Coleman as a duly authorized representative of National Financial Services LLC, as attorney-in-fact for Alan S. Roemer