C. Keith Hartley

Currently holds a position at Universal Display Corp

2.1

2.1

Position	Company	Period
Independent Director	Universal Display Corp	Sept. 26, 2000 -
Independent Director	Idera Pharmaceuticals Inc	Jan. 1, 2000 - June 9, 2014

• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings

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Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other

Notification date	Transaction date	Company	B/S Transaction type	Nb. shares Price Value	Number of shares	Price	Value
2020-11-09	2020-11-05	Universal Display Corp (OLED)	S Sale	73,426 +43.0% 337.09 US$860,688	73,426 +43.0%	337.09	US$860,688
2020-11-09	2020-11-05	Universal Display Corp (OLED)	S Sale	18,632 +45.9% 109.36 US$4,425,819	18,632 +45.9%	109.36	US$4,425,819
2020-03-20	2020-03-18	Universal Display Corp (OLED)	S Sale	98,721 -10.0% 441.35 US$2,612,152	98,721 -10.0%	441.35	US$2,612,152
2019-10-04	2019-10-02	Universal Display Corp (OLED)	S Sale	185 -0.2% 159.57 US$29,520	185 -0.2%	159.57	US$29,520