Statement of Changes in Beneficial Ownership (4)

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response... 0.5
Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* SELIGSOHN SHERWIN I	2. Issuer Name and Ticker or Trading Symbol UNIVERSAL DISPLAY CORP PA [ OLED ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chairman of Board and Founder
(Last) (First) (Middle) C/O UNIVERSAL DISPLAY CORPORATION, 375 PHILLIPS BLVD.	3. Date of Earliest Transaction (MM/DD/YYYY) 3/2/2021
(Street) EWING, NJ 08618 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	3/2/2021		A		1017 ⁽¹⁾	A	$0.00	92069	D
Common Stock	3/5/2021		F		108 ⁽²⁾	D	$189.08	91961	D
Common Stock	3/6/2021		F		131 ⁽³⁾	D	$189.08	91830	D
Common Stock	3/6/2021		A		360 ⁽⁴⁾	A	$0.00	92190	D
Common Stock	3/6/2021		F		113 ⁽⁵⁾	D	$189.08	92077	D
Common Stock	3/6/2021		F		128 ⁽⁶⁾	D	$189.08	91949	D
Common Stock								21000 ⁽⁷⁾	I	By Trust
Common Stock								136000 ⁽⁸⁾	I	By Corp.

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:
(1)	These units were granted to Mr. Seligsohn under the Company's Long Term Incentive Plan as part of his 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.
(2)	These shares were withheld to satisfy a tax liability in connection with the vesting on March 5, 2021 of 402 shares of restricted stock previously granted to Mr. Seligsohn.
(3)	These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2021 of 480 shares of restricted stock previously granted to Mr. Seligsohn.
(4)	These shares were granted to Mr. Seligsohn as performance units under the Company's Long Term Incentive Plan as part of his 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.
(5)	These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2021 of 360 shares of restricted stock previously granted to Mr. Seligsohn.
(6)	These shares were withheld to satisfy a tax liability in connection with the vesting on March 6, 2021 of 467 shares of restricted stock previously granted to Mr. Seligsohn.
(7)	The Seligsohn Foundation, of which Mr. Seligsohn is the sole trustee.
(8)	American Biomimetics Corporation, of which Mr. Seligsohn is a Director and Chairman, President and Secretary.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
SELIGSOHN SHERWIN I C/O UNIVERSAL DISPLAY CORPORATION 375 PHILLIPS BLVD. EWING, NJ 08618	X		Chairman of Board and Founder