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

5214 784779.63 47334131 06/07/2023 NASDAQ Common 03/31/2020 ESPP Purchase Issuer N 110 03/31/2020 Cash Common 06/30/2020 ESPP Purchase Issuer N 18 06/30/2020 Cash Common 03/05/2021 Restricted Stock Vesting Issuer N 424 03/05/2021 Compensation Common 03/06/2021 Restricted Stock Vesting Issuer N 4662 03/06/2021 Compensation Y 06/07/2023 /s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Julia Brown