X0306 4 2018-09-04 0001005284 UNIVERSAL DISPLAY CORP \PA\ OLED 0001553052 Premutico Mauro C/O UNIVERSAL DISPLAY CORPORATION 375 PHILLIPS BLVD. EWING NJ 08618 0 1 0 0 VP, Legal & GM, Licensing Common Stock 2018-09-04 4 S 0 200 121.65 D 83746 D Common Stock 2018-09-04 4 S 0 4450 123.1466 D 79296 D Common Stock 2018-09-04 4 S 0 4999 124.037 D 74297 D Common Stock 2018-09-04 4 S 0 395 124.8082 D 73902 D These shares were sold pursuant to a Rule 10b5-1 Non-Discretionary Trading Plan previously entered into by Mr. Premutico. Represents the weighted average of a range of sale prices from $121.20 to $122.10. The reporting person undertakes to provide to the Staff of the Securites 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. Includes 93 shares acquired under the Universal Display Corporation Employee Stock Purchase Plan on June 30, 2018. Represents the weighted average of a range of sale prices from $122.55 to $123.55. The reporting person undertakes to provide to the Staff of the Securites 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. Represents the weighted average of a range of sale prices from $123.60 to $124.55. The reporting person undertakes to provide to the Staff of the Securites 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. Represents the weighted average of a range of sale prices from $124.65 to $125.15. The reporting person undertakes to provide to the Staff of the Securites 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/ Mauro Premutico 2018-09-06