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          <ccc>XXXXXXXX</ccc>
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      <liveTestFlag>LIVE</liveTestFlag>


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  <formData>
    <issuerInfo>
      <issuerCik>0001880613</issuerCik>
      <issuerName>Direct Digital Holdings, Inc.</issuerName>
      <secFileNumber>001-41261</secFileNumber>
      <issuerAddress>
        <com:street1>1177 West Loop South</com:street1>
        <com:street2>Suite 1310</com:street2>
        <com:city>Houston</com:city>
        <com:stateOrCountry>TX</com:stateOrCountry>
        <com:zipCode>77027</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>832-402-1051</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Keith Smith</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>an officer and director of the issuer</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Class A Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Apex Clearing</name>
        <address>
          <com:street1>350 St Paul St.</com:street1>
          <com:street2>Suite 1300</com:street2>
          <com:city>Dallas</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>75201</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>250000</noOfUnitsSold>
      <aggregateMarketValue>3035000.00</aggregateMarketValue>
      <noOfUnitsOutstanding>3450000</noOfUnitsOutstanding>
      <approxSaleDate>12/05/2023</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Class A Common Stock</securitiesClassTitle>
      <acquiredDate>02/15/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Acquired upon exchange of Class B Common Stock</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Direct Digital Holings, Inc.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>250000</amountOfSecuritiesAcquired>
      <paymentDate>02/15/2022</paymentDate>
      <natureOfPayment>N/A</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>12/04/2023</noticeDate>
      <signature>/s/ Keith W. Smith</signature>
    </noticeSignature>
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144
0001203452
XXXXXXXX
LIVE
0001880613
Direct Digital Holdings, Inc.
001-41261
1177 West Loop South
Suite 1310
Houston
TX
77027
832-402-1051
Keith Smith
an officer and director of the issuer
Class A Common Stock
Apex Clearing
350 St Paul St.
Suite 1300
Dallas
TX
75201
250000
3035000.00
3450000
12/05/2023
NASDAQ
Class A Common Stock
02/15/2022
Acquired upon exchange of Class B Common Stock
Direct Digital Holings, Inc.
N
250000
02/15/2022
N/A
Y
12/04/2023
/s/ Keith W. Smith