X0306 4 2021-03-02 0 0001005284 UNIVERSAL DISPLAY CORP \PA\ OLED 0001232978 ROSENBLATT SIDNEY D C/O UNIVERSAL DISPLAY CORPORATION 375 PHILLIPS BLVD. EWING NJ 08618 1 1 0 0 EVP and CFO Common Stock 2021-03-02 4 A 0 18649 0.00 A 161735 D Common Stock 2021-03-05 4 F 0 352 189.08 D 161383 D Common Stock 2021-03-06 4 F 0 420 189.08 D 160963 D Common Stock 2021-03-06 4 F 0 3629 189.08 D 157334 D Common Stock 2021-03-06 4 F 0 5427 189.08 D 151907 D Common Stock 2021-03-06 4 A 0 744 0.00 A 152651 D Common Stock 2021-03-06 4 F 0 315 189.08 D 152336 D Common Stock 92275 I By Grantor Retained Annuity Trust Common Stock 13000 I By Spouse These units were granted to Mr. Rosenblatt under the Company's Long Term Incentive Plan as part of his 2021 compensation and are subject to a time-based restriction, with one-third of the total unit amount vesting on each of March 2, 2022, 2023, and 2024. These shares were withheld to satisfy a tax liability in connection with the vesting on March 5, 2021 of 831 shares of restricted stock previously granted to Mr. Rosenblatt. These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2021 of 991 shares of restricted stock previously granted to Mr. Rosenblatt. These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2021 of 8,556 shares of restricted stock previously granted to Mr. Rosenblatt. These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2021 of 12,800 shares of restricted stock previously granted to Mr. Rosenblatt. These shares were granted to Mr. Rosenblatt as performance units under the Company's Long Term Incentive Plan as part of his 2018 compensation and vested on March 6, 2021 subject to the satisfaction of certain performance conditions, which our Human Capital Committee certified on February 16, 2021 as having occurred. These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2021 of 744 shares of restricted stock previously granted to Mr. Rosenblatt. /s/ Sidney. D. Rosenblatt (by Mauro Premutico as power of attorney) 2021-03-09