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            <ccc>XXXXXXXX</ccc>
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        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
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        <issuerName>UNIVERSAL DISPLAY CORP \PA\</issuerName>
        <secFileNumber>001-12031</secFileNumber>
        <issuerAddress>
          <com:street1>250 PHILLIPS BOULEVARD</com:street1>
          <com:city>EWING</com:city>
          <com:stateOrCountry>NJ</com:stateOrCountry>
          <com:zipCode>08618</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>6096710980</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Premutico Mauro</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
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      <securitiesInformation>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Fidelity Brokerage Services LLC</name>
          <address>
            <com:street1>900 Salem Street</com:street1>
            <com:city>Smithfield</com:city>
            <com:stateOrCountry>RI</com:stateOrCountry>
            <com:zipCode>02917</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>8202</noOfUnitsSold>
        <aggregateMarketValue>1446012.60</aggregateMarketValue>
        <noOfUnitsOutstanding>47439488</noOfUnitsOutstanding>
        <approxSaleDate>05/07/2024</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
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        <securitiesClassTitle>Common</securitiesClassTitle>
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        <natureOfAcquisitionTransaction>ESPP Purchase</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>72</amountOfSecuritiesAcquired>
        <paymentDate>06/30/2020</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
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        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>31</amountOfSecuritiesAcquired>
        <paymentDate>09/30/2020</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
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      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
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        <natureOfAcquisitionTransaction>ESPP Purchase</natureOfAcquisitionTransaction>
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        <amountOfSecuritiesAcquired>29</amountOfSecuritiesAcquired>
        <paymentDate>09/30/2021</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/05/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>244</amountOfSecuritiesAcquired>
        <paymentDate>03/05/2022</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/06/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>3205</amountOfSecuritiesAcquired>
        <paymentDate>03/06/2022</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/31/2022</acquiredDate>
        <natureOfAcquisitionTransaction>ESPP Purchase</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>53</amountOfSecuritiesAcquired>
        <paymentDate>03/31/2022</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>06/30/2022</acquiredDate>
        <natureOfAcquisitionTransaction>ESPP Purchase</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>97</amountOfSecuritiesAcquired>
        <paymentDate>06/30/2022</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>02/16/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
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        <natureOfPayment>Compensation</natureOfPayment>
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      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/02/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
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        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1498</amountOfSecuritiesAcquired>
        <paymentDate>03/02/2023</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/06/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>1143</amountOfSecuritiesAcquired>
        <paymentDate>03/06/2023</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/22/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
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        <paymentDate>03/22/2023</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>05/07/2024</noticeDate>
        <signature>/s/ Jared Cook, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Mauro Premutico</signature>
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text: 144
  0001553052
  XXXXXXXX
  LIVE
  0001005284
  UNIVERSAL DISPLAY CORP \PA\
  001-12031
  250 PHILLIPS BOULEVARD
  EWING
  NJ
  08618
  6096710980
  Premutico Mauro
  Officer
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  8202
  1446012.60
  47439488
  05/07/2024
  NASDAQ
  Common
  06/30/2020
  ESPP Purchase
  Issuer
  N
  72
  06/30/2020
  Cash
  Common
  09/30/2020
  ESPP Purchase
  Issuer
  N
  31
  09/30/2020
  Cash
  Common
  09/30/2021
  ESPP Purchase
  Issuer
  N
  29
  09/30/2021
  Cash
  Common
  03/05/2022
  Restricted Stock Vesting
  Issuer
  N
  244
  03/05/2022
  Compensation
  Common
  03/06/2022
  Restricted Stock Vesting
  Issuer
  N
  3205
  03/06/2022
  Compensation
  Common
  03/31/2022
  ESPP Purchase
  Issuer
  N
  53
  03/31/2022
  Cash
  Common
  06/30/2022
  ESPP Purchase
  Issuer
  N
  97
  06/30/2022
  Cash
  Common
  02/16/2023
  Restricted Stock Vesting
  Issuer
  N
  1056
  02/16/2023
  Compensation
  Common
  03/02/2023
  Restricted Stock Vesting
  Issuer
  N
  1498
  03/02/2023
  Compensation
  Common
  03/06/2023
  Restricted Stock Vesting
  Issuer
  N
  1143
  03/06/2023
  Compensation
  Common
  03/22/2023
  Restricted Stock Vesting
  Issuer
  N
  774
  03/22/2023
  Compensation
  Y
  05/07/2024
  /s/ Jared Cook, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Mauro Premutico