X0306 4 2022-04-05 0 0001005284 UNIVERSAL DISPLAY CORP \PA\ OLED 0001233730 SELIGSOHN SHERWIN I C/O UNIVERSAL DISPLAY CORPORATION 250 PHILLIPS BLVD. EWING NJ 08618 1 1 0 0 Chairman of Board and Founder Common Stock 2022-04-05 4 A 0 1208 0.00 A 89649 D Common Stock 2022-04-05 4 F 0 512 163.29 D 89137 D Common Stock 21000 I By Trust Common Stock 136000 I By Corp. These shares were granted to the reporting person as performance units under the Company's Long Term Incentive Plan as part of 2019 compensation and vested subject to the satisfaction of certain performance conditions, which our Human Capital Committee certified on April 5, 2022 as having occurred. These shares were withheld to satisfy a tax liability in connection with the vesting on April 5, 2022 of 1,208 shares of restricted stock previously granted to the reporting person. /s/ Sherwin I. Seligsohn (by Mauro Premutico as power of attorney) 2022-04-07