X0306 4 2019-03-01 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 2019-03-01 4 F 0 307 152.38 D 92303 D Common Stock 2019-03-05 4 A 0 2372 0 A 94675 D Common Stock 2019-03-05 4 F 0 650 153.07 D 94025 D Common Stock 2019-03-05 4 A 0 1207 0 A 95232 D Common Stock 21000 I By Trust Common Stock 136000 I By Corp. These shares were withheld to satisfy a tax liability in connection with the vesting on March 1, 2019 of 1,054 shares of restricted stock previously granted to Mr. Seligsohn. Amount reflects an adjustment for bona fide gifts totaling 5,000 shares that were made by Mr. Seligsohn at the end of December 2018 and not previously reported. These shares were granted to Mr. Seligsohn 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 2,372 shares of restricted stock previously granted to Mr. Seligsohn. These units were granted to Mr. Seligsohn 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. The Seligsohn Foundation, of which Mr. Seligsohn is the sole trustee. American Biomimetics Corporation, of which Mr. Seligsohn is the sole Director, Chairman, President and Secretary. /s/ Sidney D. Rosenblatt (by power of attorney) 2019-03-05