Universal Display (OLED) SVP has shares withheld to cover tax on RSU vesting

Rhea-AI Filing Summary

UNIVERSAL DISPLAY CORP \PA\ Senior VP Janice K. Mahon reported a tax-related share disposition tied to restricted stock vesting. On the non-derivative Common Stock, 605 shares were disposed of at a price of $101.52 per share under a tax-withholding arrangement.

According to the disclosure, these shares were withheld to satisfy a tax liability arising from the vesting on March 4, 2026 of 1,676 shares of previously granted restricted stock. Following this withholding transaction, Mahon directly owned 58,511 shares of Common Stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Mahon Janice K

Role SVP of Tech Commercialization

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	605	$101.52	$61K

Holdings After Transaction: Common Stock — 58,511 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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

OMB APPROVAL

OMB Number:			3235-0287
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hours per response:			0.5

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^*

Mahon Janice K

(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)
	SVP of Tech Commercialization

3. Date of Earliest Transaction (Month/Day/Year)
03/04/2026

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	03/04/2026		F		605(1)	D	$101.52	58,511	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 withheld to satisfy a tax liability in connection with the vesting on March 4, 2026 of 1,676 shares of restricted stock previously granted to the Reporting Person.

	/s/ Janice K. Mahon (by Mauro Premutico as power of attorney)	03/06/2026
	** 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 insider transaction did Janice K. Mahon report for OLED?

Janice K. Mahon reported a tax-withholding disposition of Common Stock. The transaction involved 605 shares used to satisfy tax liabilities arising from the vesting of 1,676 restricted shares on March 4, 2026, rather than an open-market sale.

Was the OLED Form 4 transaction an open-market sale of shares?

No, the OLED Form 4 describes a tax-withholding disposition, not an open-market sale. Shares were withheld by the company to cover tax liabilities triggered by the vesting of 1,676 restricted stock shares on March 4, 2026.

How many OLED shares were withheld for taxes in Mahon’s Form 4 filing?

The filing shows 605 shares of OLED Common Stock were disposed of. These shares were withheld to satisfy a tax liability in connection with the vesting of 1,676 restricted stock shares granted earlier to Janice K. Mahon.

What is Janice K. Mahon’s role at Universal Display (OLED)?

Janice K. Mahon is identified as an officer of Universal Display, serving as Senior Vice President of Technology Commercialization. Her Form 4 filing reports a tax-withholding share disposition related to vesting restricted stock granted in her capacity as a company executive.

How many OLED shares does Janice K. Mahon hold after the reported transaction?

After the reported tax-withholding disposition, Janice K. Mahon directly holds 58,511 shares of OLED Common Stock. This figure reflects her ownership following the withholding of 605 shares to cover tax obligations tied to restricted stock vesting.

What triggered the tax-withholding disposition reported in OLED’s Form 4?

The tax-withholding disposition was triggered by the vesting of 1,676 shares of restricted stock on March 4, 2026. To satisfy the resulting tax liability, 605 shares of Common Stock were withheld instead of being sold in the open market.