X0304 4 2011-08-25 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 2011-08-25 4 M 0 3750 8.14 A 26363 D Common Stock 2011-08-25 4 M 0 500 9.21 A 26863 D Common Stock 2011-08-25 4 M 0 250 9.60 A 27113 D Common Stock 2011-08-25 4 M 0 500 9.94 A 27613 D Common Stock 2011-08-25 4 M 0 250 10.07 A 27863 D Common Stock 2011-08-25 4 M 0 5000 10.51 A 32863 D Common Stock 2011-08-25 4 M 0 250 10.62 A 33113 D Common Stock 2011-08-25 4 M 0 750 12.40 A 33863 D Common Stock 2011-08-25 4 M 0 250 13.28 A 34113 D Common Stock 2011-08-25 4 M 0 5000 13.92 A 39113 D Common Stock 2011-08-25 4 S 0 16500 50.15 D 22622 D Common Stock 2011-08-26 4 M 0 15000 10.51 A 37622 D Common Stock 2011-08-26 4 S 0 15000 50.82 D 22622 D Employee Stock Option (right to buy) 8.14 2011-08-25 4 M 0 3750 0 D 2005-01-18 2015-01-18 Common Stock 3750 0 D Employee Stock Option (right to buy) 9.21 2011-08-25 4 M 0 500 0 D 2003-09-15 2013-09-15 Common Stock 500 0 D Employee Stock Option (right to buy) 9.60 2011-08-25 4 M 0 250 0 D 2003-06-16 2013-06-16 Common Stock 250 0 D Employee Stock Option (right to buy) 9.94 2011-08-25 4 M 0 500 0 D 2002-11-18 2012-11-18 Common Stock 500 0 D Employee Stock Option (right to buy) 10.07 2011-08-25 4 M 0 250 0 D 2004-11-23 2014-11-23 Common Stock 250 0 D Employee Stock Option (right to buy) 10.51 2011-08-25 4 M 0 5000 0 D 2005-12-30 2015-12-30 Common Stock 5000 15000 D Employee Stock Option (right to buy) 10.62 2011-08-25 4 M 0 250 0 D 2004-06-15 2014-06-15 Common Stock 250 0 D Employee Stock Option (right to buy) 12.40 2011-08-25 4 M 0 750 0 D 2006-06-20 2016-06-20 Common Stock 750 0 D Employee Stock Option (right to buy) 13.28 2011-08-25 4 M 0 250 0 D 2004-04-20 2014-04-20 Common Stock 250 0 D Employee Stock Option (right to buy) 13.92 2011-08-25 4 M 0 5000 0 D 2003-12-23 2013-12-23 Common Stock 5000 0 D Employee Stock Option (right to buy) 10.51 2011-08-26 4 M 0 15000 0 D 2005-12-30 2015-12-30 Common Stock 15000 0 D Represents the weighted average of a range of sale prices from $50.10 to $50.25 per share. Full information regarding the number of shares sold at each separate price will be provided on request. Represents the weighted average of a range of sale prices from $50.64 to $51.00 per share. Full information regarding the number of shares sold at each separate price will be provided on request. /s/ Michael G. Hack 2011-08-29