X0306 4 2020-03-05 0001005284 UNIVERSAL DISPLAY CORP \PA\ OLED 0001232979 BROWN JULIA J C/O UNIVERSAL DISPLAY CORPORATION 375 PHILLIPS BLVD. EWING NJ 08618 0 1 0 0 Chief Technical Officer Common Stock 2020-03-05 4 F 0 169 160.13 D 87876 D Common Stock 2020-03-06 4 F 0 190 155.850 D 87686 D Common Stock 2020-03-06 4 A 0 18015 0.0 A 105701 D Common Stock 2020-03-07 4 F 0 261 155.85 D 105440 D Common Stock 2020-03-07 4 A 0 2866 0.0 A 108306 D Common Stock 2020-03-07 4 F 0 785 155.850 D 107521 D Common Stock 2020-03-08 4 F 0 10410 155.85 D 97111 D These shares were withheld to satisfy a tax liability in connection with the vesting on March 5, 2020 of 584 shares of restricted stock previously granted to Dr. Brown. These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2020 of 697 shares of restricted stock previously granted to Dr. Brown. These units were granted to Dr. Brown under the Company's Long Term Incentive Plan as part of her 2020 compensation and are subject to a time-based restriction, with one-third of the total unit amount vesting on each of March 6, 2021, 2022, and 2023. These shares were withheld to satisfy a tax liability in connection with the vesting on March 7, 2020 of 955 shares of restricted stock previously granted to Dr. Brown. These shares were granted to Dr. Brown as performance units under the Company's Long Term Incentive Plan as part of her 2017 compensation and vested on March 7, 2020 subject to the satisfaction of certain performance conditions, which our Compensation Committee certified on February 13, 2020 as having occurred. These shares were withheld to satisfy a tax liability in connection with the vesting on March 7, 2020 of 2,866 shares of restricted stock previously granted to Dr. Brown. These shares were withheld to satisfy a tax liability in connection with the vesting on March 8, 2020 of 25,000 shares of restricted stock previously granted to Dr. Brown. /s/ Julia J. Brown (by Mauro Premutico as power of attorney) 2020-03-09