X0306 4 2020-04-07 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 2020-04-07 4 A 0 4078 0.0 A 229054 D Common Stock 2020-04-07 4 F 0 1729 134.75 D 227325 D Common Stock 2020-04-07 4 F 0 21210 134.75 D 206115 D Common Stock 53840 I By Grantor Retained Annuity Trust Common Stock 13000 I By Spouse Common Stock 50356 I By Family Limited Partnership These shares were granted to Mr. Rosenblatt 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. Includes 16 shares acquired under the Universal Display Corporation Employee Stock Purchase Plan on March 31, 2020. These shares were withheld to satisfy a tax liability in connection with the vesting on April 7, 2020 of 4,078 shares of restricted stock previously granted to Rosenblatt. These shares were withheld to satisfy a tax liability in connection with the vesting on April 7, 2020 of 50,000 shares of restricted stock previously granted to Mr. Rosenblatt. These shares are held by Mr. Rosenblatt's spouse and are being reported as beneficially owned by him. These shares are held by the Rosenblatt Family Limited Partnership, a limited partnership of which Mr. Rosenblatt is the sole general partner and he and his children are the sole limited partners. /s/ Sidney. D. Rosenblatt (by Mauro Premutico as power of attorney) 2020-04-09