X0306 4 2020-08-11 0001005284 UNIVERSAL DISPLAY CORP \PA\ OLED 0001101463 LACERTE LAWRENCE C/O UNIVERSAL DISPLAY CORPORATION 375 PHILLIPS BLVD. EWING NJ 08618 1 0 0 0 Common Stock 2020-08-11 4 S 0 1594.0 184.18 D 259265.0 D Common Stock 2020-08-11 4 S 0 100 184.82 D 259165 D Represents the weighted average of a range of sale prices from $183.79 to $184.75. The reporting person undertakes to provide to the Staff of Securities and Exchange Commission, the Company or any shareholder of the Company, upon request, full information regarding the number of shares sold at each separate price. /s/ Lawrence Lacerte (by Mauro Premutico as power of attorney) 2020-08-13