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        <filer>
          <filerCredentials>
            <cik>0001232979</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
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        <issuerCik>0001005284</issuerCik>
        <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>BROWN JULIA J</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <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>10358</noOfUnitsSold>
        <aggregateMarketValue>1812650.00</aggregateMarketValue>
        <noOfUnitsOutstanding>47439488</noOfUnitsOutstanding>
        <approxSaleDate>05/08/2024</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
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        <securitiesClassTitle>Common</securitiesClassTitle>
        <acquiredDate>03/08/2021</acquiredDate>
        <natureOfAcquisitionTransaction>Restricted Stock Vesting</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>6900</amountOfSecuritiesAcquired>
        <paymentDate>03/08/2021</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>3458</amountOfSecuritiesAcquired>
        <paymentDate>03/06/2022</paymentDate>
        <natureOfPayment>Compensation</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>05/08/2024</noticeDate>
        <signature>/s/ Gary Redman, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Julia Brown</signature>
      </noticeSignature>
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text: 144
  0001232979
  XXXXXXXX
  LIVE
  0001005284
  UNIVERSAL DISPLAY CORP \PA\
  001-12031
  250 PHILLIPS BOULEVARD
  EWING
  NJ
  08618
  6096710980
  BROWN JULIA J
  Officer
  Common
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  10358
  1812650.00
  47439488
  05/08/2024
  NASDAQ
  Common
  03/08/2021
  Restricted Stock Vesting
  Issuer
  N
  6900
  03/08/2021
  Compensation
  Common
  03/06/2022
  Restricted Stock Vesting
  Issuer
  N
  3458
  03/06/2022
  Compensation
  Y
  05/08/2024
  /s/ Gary Redman, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Julia Brown