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  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001923461</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001888012</issuerCik>
      <issuerName>HilleVax, Inc.</issuerName>
      <secFileNumber>001-41365</secFileNumber>
      <issuerAddress>
        <com:street1>321 HARRISON AVE, SUITE 500</com:street1>
        <com:city>BOSTON</com:city>
        <com:stateOrCountry>MA</com:stateOrCountry>
        <com:zipCode>02118</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>(617) 213-5054</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Borkowski Astrid</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Officer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Zurcher Kantonalbank</name>
        <address>
          <com:street1>Bahnhofsstrasse</com:street1>
          <com:street2>9 Postfach</com:street2>
          <com:city>Zurich</com:city>
          <com:stateOrCountry>V8</com:stateOrCountry>
          <com:zipCode>8010</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>10000</noOfUnitsSold>
      <aggregateMarketValue>140000.00</aggregateMarketValue>
      <noOfUnitsOutstanding>48437001</noOfUnitsOutstanding>
      <approxSaleDate>11/17/2023</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>03/08/2021</acquiredDate>
      <natureOfAcquisitionTransaction>PURCHASE FROM ISSUER</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>ISSUER</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>168100</amountOfSecuritiesAcquired>
      <paymentDate>03/08/2021</paymentDate>
      <natureOfPayment>CASH</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>11/27/2023</noticeDate>
      <signature>/s/ Astrid Borkowski</signature>
    </noticeSignature>
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144
0001923461
XXXXXXXX
LIVE
0001888012
HilleVax, Inc.
001-41365
321 HARRISON AVE, SUITE 500
BOSTON
MA
02118
(617) 213-5054
Borkowski Astrid
Officer
Common Stock
Zurcher Kantonalbank
Bahnhofsstrasse
9 Postfach
Zurich
V8
8010
10000
140000.00
48437001
11/17/2023
NASDAQ
Common Stock
03/08/2021
PURCHASE FROM ISSUER
ISSUER
N
168100
03/08/2021
CASH
Y
11/27/2023
/s/ Astrid Borkowski