[Form 4] UNIVERSAL DISPLAY CORP PA Insider Trading Activity

Rhea-AI Filing Summary

Universal Display Corp EVP & Chief Technical Officer Julia J. Brown reported equity compensation and related tax withholding transactions in company stock. On March 7, 2026, she received a total of 22,555 shares of common stock through vested performance and restricted stock awards granted as part of 2023 compensation. To cover tax liabilities on these vestings, 10,759 shares were withheld at a price of $97.03 per share, rather than sold in the open market. After these routine compensation and tax-withholding entries, Brown directly holds 95,952 shares of Universal Display common stock.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

BROWN JULIA J

(Last) (First) (Middle)

C/O UNIVERSAL DISPLAY CORPORATION

250 PHILLIPS BLVD.

(Street)

EWING NJ 08618

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
UNIVERSAL DISPLAY CORP \PA\ [ OLED ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP & Chief Technical Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/07/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

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. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/07/2026		A		4,202(1)	A	$0	88,358	D
Common Stock	03/07/2026		F		1,544(2)	D	$97.03	86,814	D
Common Stock	03/07/2026		A		13,872(1)	A	$0	100,686	D
Common Stock	03/07/2026		F		5,884(3)	D	$97.03	94,802	D
Common Stock	03/07/2026		A		4,481(1)	A	$0	99,283	D
Common Stock	03/07/2026		F		1,900(4)	D	$97.03	97,383	D
Common Stock	03/07/2026		F		1,431(5)	D	$97.03	95,952	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction 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 (Month/Day/Year)		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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. These shares were granted to the Reporting Person as performance units under the Company's Long Term Incentive Plan as part of 2023 compensation and vested on March 7, 2026 subject to the satisfaction of certain performance conditions, which the Company's Human Capital Committee certified on February 17, 2026 as having occurred.

2. These shares were withheld to satisfy a tax liability in connection with the vesting on March 7, 2026 of 4,202 shares of restricted stock previously granted to the Reporting Person.

3. These shares were withheld to satisfy a tax liability in connection with the vesting on March 7, 2026 of 13,872 shares of restricted stock previously granted to the Reporting Person.

4. These shares were withheld to satisfy a tax liability in connection with the vesting on March 7, 2026 of 4,481 shares of restricted stock previously granted to the Reporting Person.

5. These shares were withheld to satisfy a tax liability in connection with the vesting on March 7, 2026 of 3,375 shares of restricted stock previously granted to the Reporting Person.

	/s/ Julia J. Brown (by Mauro Premutico as power of attorney)	03/10/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Universal Display (OLED) EVP Julia Brown report in this Form 4?

Julia Brown reported routine equity compensation and tax-withholding transactions. She received vested stock awards totaling 22,555 shares, with 10,759 shares withheld to cover taxes, resulting in a new direct holding of 95,952 Universal Display common shares.

How many Universal Display (OLED) shares did Julia Brown acquire in the latest filing?

Julia Brown acquired 22,555 Universal Display common shares through vested performance and restricted stock awards. These grants were issued as part of her 2023 compensation under the company’s Long Term Incentive Plan and vested on March 7, 2026.

Why were some of Julia Brown’s Universal Display (OLED) shares disposed in the Form 4?

The filing shows 10,759 shares classified as dispositions, but they were withheld by the company to satisfy tax liabilities tied to vesting stock awards. These are tax-withholding entries, not open-market sales, and do not reflect discretionary selling activity.

What is Julia Brown’s Universal Display (OLED) share ownership after these transactions?

After the reported compensation and tax-withholding transactions, Julia Brown directly holds 95,952 Universal Display common shares. This figure reflects all grants that vested on March 7, 2026, net of shares withheld by the company for tax obligations.

At what price were Julia Brown’s withheld Universal Display (OLED) shares valued?

The tax-withheld shares in the Form 4 are reported at $97.03 per share. This price applies to 10,759 shares withheld to cover tax liabilities arising from the vesting of multiple restricted and performance stock awards on March 7, 2026.

Were Julia Brown’s Universal Display (OLED) transactions open-market buys or sells?

No open-market buys or sells are reported. The Form 4 shows stock awards granted at no cost and shares withheld for taxes at $97.03 per share. These entries are compensation and tax events, not discretionary market trading in Universal Display stock.