UNIVERSAL DISPLAY CORP \PA\ - Director's Dealing 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: UNIVERSAL DISPLAY CORP \PA\ (PANL)
CIK: 0001005284
Period of Report: 2010-06-01

Reporting Person: Hack Michael G (GM OLED Lighting & Displays,VP)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-06-01	Common Stock	S	2500	$17.10	Disposed	14456	Direct
2010-06-01	Common Stock	S	1700	$17.081	Disposed	12756	Direct
2010-06-01	Common Stock	S	800	$17.08	Disposed	11956	Direct
2010-06-01	Common Stock	S	1024	$17.11	Disposed	10932	Direct
2010-06-03	Common Stock	M	3250	$8.14	Acquired	14182	Direct
2010-06-03	Common Stock	S	400	$18.451	Disposed	13782	Direct
2010-06-03	Common Stock	S	1400	$18.372	Disposed	12382	Direct
2010-06-03	Common Stock	S	250	$18.371	Disposed	12132	Direct
2010-06-03	Common Stock	S	200	$18.36	Disposed	11932	Direct
2010-06-03	Common Stock	S	100	$18.381	Disposed	11832	Direct
2010-06-03	Common Stock	S	300	$18.40	Disposed	11532	Direct
2010-06-03	Common Stock	S	100	$18.391	Disposed	11432	Direct
2010-06-03	Common Stock	S	100	$18.411	Disposed	11332	Direct
2010-06-03	Common Stock	S	100	$18.421	Disposed	11232	Direct
2010-06-03	Common Stock	S	200	$18.441	Disposed	11032	Direct
2010-06-03	Common Stock	S	100	$18.443	Disposed	10932	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-06-03	Employee Stock Option (right to buy)	$8.14	M	3250	Disposed	2015-01-18	Common Stock (3250)	Direct

F1: Includes 574 shares acquired under the Universal Display Corporation Employee Stock Purchase Plan on March 31, 2010.