UNIVERSAL DISPLAY CORP \PA\ — Director's Dealing 2021

Mar 9, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: UNIVERSAL DISPLAY CORP \PA\ (OLED)
CIK: 0001005284
Period of Report: 2021-03-02

Reporting Person: Mahon Janice K (VP of Tech Commercialization)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-03-02	Common Stock	A	8112	$0.00	Acquired	39354	Direct
2021-03-05	Common Stock	F	117	$189.08	Disposed	39237	Direct
2021-03-06	Common Stock	F	138	$189.08	Disposed	39099	Direct
2021-03-06	Common Stock	A	288	$0.00	Acquired	39387	Direct
2021-03-06	Common Stock	F	121	$189.08	Disposed	39266	Direct
2021-03-06	Common Stock	F	1345	$189.08	Disposed	37921	Direct
2021-03-08	Common Stock	F	3499	$199.81	Disposed	34422	Direct

Footnotes

F1: These shares were granted to Ms. Mahon under the Company's Long Term Incentive Plan as part of her 2021 compensation and are subject to a time-based restriction, with one-third of the total unit amount vesting on each of March 2, 2022, 2023, and 2024.

F2: Includes 20 shares acquired under the Universal Display Corporation Employee Stock Purchase Plan on December 31, 2020.

F3: These shares were withheld to satisfy a tax liability in connection with the vesting on March 5, 2021 of 322 shares of restricted stock previously granted to Ms. Mahon.

F4: These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2021 of 384 shares of restricted stock previously granted to Ms. Mahon.

F5: These shares were granted to Ms. Mahon as performance units under the Company's Long Term Incentive Plan as part of her 2018 compensation and vested on March 6, 2021 subject to the satisfaction of certain performance conditions, which our Human Capital Committee certified on February 16, 2021 as having occurred.

F6: These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2021 of 288 shares of restricted stock previously granted to Ms. Mahon.

F7: These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2021 of 3,722 shares of restricted stock previously granted to Ms. Mahon.

F8: These shares were withheld to satisfy a tax liability in connection with the vesting on March 8, 2021 of 7,000 shares of restricted stock previously granted to Ms. Mahon.