X0306 4 2020-04-07 0001005284 UNIVERSAL DISPLAY CORP \PA\ OLED 0001233730 SELIGSOHN SHERWIN I C/O UNIVERSAL DISPLAY CORPORATION 375 PHILLIPS BLVD. EWING NJ 08618 1 1 0 0 Chairman of Board and Founder Common Stock 2020-04-07 4 A 0 1974 0.0 A 96889 D Common Stock 2020-04-07 4 F 0 837 134.75 D 96052 D Common Stock 21000 I By Trust Common Stock 136000 I By Corp. These shares were granted to Mr. Seligsohn as performance units under the Company's Long Term Incentive Plan as part of his 2017 compensation and vested subject to the satisfaction of certain performance conditions, which our Compensation Committee certified on April 7, 2020 as having occurred. These shares were withheld to satisfy a tax liability in connection with the vesting on April 7, 2020 of 1,974 shares of restricted stock previously granted to Mr. Seligsohn. The Seligsohn Foundation, of which Mr. Seligsohn is the sole trustee. American Biomimetics Corporation, of which Mr. Seligsohn is a Director and Chairman, President and Secretary. /s/ Sherwin I. Seligsohn (by Mauro Premutico as power of attorney) 2020-04-09