X0306 4 2013-09-17 0001005284 UNIVERSAL DISPLAY CORP \PA\ OLED 0001479956 Hack Michael G C/O UNIVERSAL DISPLAY CORPORATION 375 PHILLIPS BLVD. EWING NJ 08618 0 1 0 0 GM OLED Lighting & Displays,VP Common Stock 2013-09-17 4 S 0 3231 33.65 D 36890 D These shares were sold pursuant to a Rule 10b5-1Non-Discretionary Trading Plan previously enter into by Dr. Hack. Represents the weighted average of a range of sale prices per share from $33.45 to $34.08. The reporting person undertakes to provide to the Staff of the 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. Includes an adjustment of 10 shares withheld to satisfy a prior tax liability of Dr. Hack. /s/ Michael G. Hack 2013-09-19