X0303 4 2010-06-01 0001005284 UNIVERSAL DISPLAY CORP \PA\ PANL 0001479956 Hack Michael G 375 PHILLIPS BLVD. EWING NJ 08618 0 1 0 0 GM OLED Lighting & Displays,VP Common Stock 2010-06-01 4 S 0 2500 17.10 D 14456 D Common Stock 2010-06-01 4 S 0 1700 17.081 D 12756 D Common Stock 2010-06-01 4 S 0 800 17.08 D 11956 D Common Stock 2010-06-01 4 S 0 1024 17.11 D 10932 D Common Stock 2010-06-03 4 M 0 3250 8.14 A 14182 D Common Stock 2010-06-03 4 S 0 400 18.451 D 13782 D Common Stock 2010-06-03 4 S 0 1400 18.372 D 12382 D Common Stock 2010-06-03 4 S 0 250 18.371 D 12132 D Common Stock 2010-06-03 4 S 0 200 18.36 D 11932 D Common Stock 2010-06-03 4 S 0 100 18.381 D 11832 D Common Stock 2010-06-03 4 S 0 300 18.40 D 11532 D Common Stock 2010-06-03 4 S 0 100 18.391 D 11432 D Common Stock 2010-06-03 4 S 0 100 18.411 D 11332 D Common Stock 2010-06-03 4 S 0 100 18.421 D 11232 D Common Stock 2010-06-03 4 S 0 200 18.441 D 11032 D Common Stock 2010-06-03 4 S 0 100 18.443 D 10932 D Employee Stock Option (right to buy) 8.14 2010-06-03 4 M 0 3250 0 D 2005-01-18 2015-01-18 Common Stock 3250 3750 D Includes 574 shares acquired under the Universal Display Corporation Employee Stock Purchase Plan on March 31, 2010. /s/ Michael G. Hack 2010-06-03