X0306 4 2019-03-01 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 2019-03-01 4 F 0 434 152.38 D 73518 D Common Stock 2019-03-05 4 A 0 1748 0 A 75266 D Common Stock 2019-03-05 4 F 0 930 153.07 D 74336 D Common Stock 2019-03-05 4 A 0 1186 0 A 75522 D These shares were withheld to satisfy a tax liability in connection with the vesting on March 1, 2019 of 777 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 2016 compensation and vested subject to the satisfaction of certain performance conditions, which our Compensation Committee certified on March 5, 2019 as having occurred. These shares were withheld to satisfy a tax liability in connection with the vesting on March 5, 2019 of 1,748 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 2019 compensation and are subject to a time-based restriction, with one-third of the total unit amount vesting on each of March 5, 2020, 2021, and 2022. /s/ Mauro Premutico 2019-03-05