X0306 4 2022-03-05 0 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 EVP & Chief Technical Officer Common Stock 2022-03-05 4 A 0 219 0.00 A 64270 D Common Stock 2022-03-05 4 F 0 92 156.07 D 64178 D Common Stock 2022-03-05 4 F 0 247 156.07 D 63931 D Common Stock 2022-03-06 4 F 0 2171 156.07 D 61760 D Common Stock 2022-03-06 4 F 0 2547 156.07 D 59213 D These shares were granted to the reporting person as performance units under the Company's Long Term Incentive Plan as part of her 2019 compensation and vested on March 5, 2022 subject to the satisfaction of certain performance conditions, which the Company's Human Capital Committee certified on February 16, 2022 as having occurred. These shares were withheld to satisfy a tax liability in connection with the vesting on March 5, 2022 of 219 shares of restricted stock previously granted to the reporting person. These shares were withheld to satisfy a tax liability in connection with the vesting on March 5, 2022 of 583 shares of restricted stock previously granted to the reporting person. These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2022 of 5,120 shares of restricted stock previously granted to the reporting person. These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2022 of 6,005 shares of restricted stock previously granted to the reporting person. /s/ Julia J. Brown (by Mauro Premutico as power of attorney) 2022-03-08