X0306 4 2020-03-05 0001005284 UNIVERSAL DISPLAY CORP \PA\ OLED 0001553052 Premutico Mauro C/O UNIVERSAL DISPLAY CORPORATION 375 PHILLIPS BLVD. EWING NJ 08618 0 1 0 0 VP, Legal & GM, Licensing Common Stock 2020-03-05 4 F 0 228 160.13 D 55885 D Common Stock 2020-03-06 4 F 0 248 155.85 D 55637 D Common Stock 2020-03-06 4 A 0 13860 0.0 A 69497 D Common Stock 2020-03-07 4 F 0 258 155.85 D 69239 D Common Stock 2020-03-07 4 A 0 1456 0.0 A 70695 D Common Stock 2020-03-07 4 F 0 774 155.85 D 69921 D These shares were withheld to satisfy a tax liability in connection with the vesting on March 5, 2020 of 396 shares of restricted stock previously granted to Mr. Premutico. These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2020 of 472 shares of restricted stock previously granted to Mr. Premutico. These units were granted to Mr. Premutico under the Company's Long Term Incentive Plan as part of his 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 485 shares of restricted stock previously granted to Mr. Premutico. These shares were granted to Mr. Premutico as performance units under the Company's Long Term Incentive Plan as part of his 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 1,456 shares of restricted stock previously granted to Mr. Premutico. /s/ Mauro Premutico 2020-03-09