InterDigital officer receives 4,140-share stock award

Mattis Julia C reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Mattis Julia C reported acquisition or exercise transactions in this Form 4 filing.

InterDigital, Inc. Chief Licensing Officer Julia C. Mattis received an equity award of 4,140 shares of common stock on the reported date. The award was granted at no cash cost to her as part of restricted stock units issued under the company's 2025 Equity Incentive Plan and its long-term compensation program.

Following this grant, Mattis directly holds a total of 13,121.9474 shares of InterDigital common stock, reflecting routine equity-based compensation rather than an open-market purchase or sale.

Insider Trade Summary

Grant/Award: 4,140 shares

Grant/Award 1 txn

Insider Mattis Julia C

Role Chief Licensing Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	4,140	$0.00	$0.00

Holdings After Transaction: Common Stock — 13,121.9474 shares (Direct)

Footnotes (1)

1. F1. Restricted stock units granted pursuant to the company's 2025 Equity Incentive Plan in accordance with the company's long-term compensation program.

Key Figures

Stock award size: 4,140 shares Award price per share: $0.00 per share Total holdings after grant: 13,121.9474 shares

3 metrics

Stock award size 4,140 shares Restricted stock units granted to Julia C. Mattis

Award price per share $0.00 per share Grant/award acquisition of common stock

Total holdings after grant 13,121.9474 shares Direct ownership by Julia C. Mattis following transaction

Key Terms

Restricted stock units, 2025 Equity Incentive Plan, long-term compensation program, Grant, award, or other acquisition

4 terms

Restricted stock units financial

"Restricted stock units granted pursuant to the company's 2025 Equity Incentive Plan"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

2025 Equity Incentive Plan financial

"granted pursuant to the company's 2025 Equity Incentive Plan in accordance"

long-term compensation program financial

"in accordance with the company's long-term compensation program"

Grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did InterDigital (IDCC) report for Julia C. Mattis?

InterDigital reported that Chief Licensing Officer Julia C. Mattis acquired 4,140 shares of common stock. These shares came from a restricted stock unit grant under the 2025 Equity Incentive Plan, reflecting routine equity compensation rather than an open-market stock purchase.

Was the InterDigital (IDCC) stock award to Julia C. Mattis an open-market purchase?

No, the 4,140 shares reported for Julia C. Mattis were granted at a price of $0.00 per share. They represent restricted stock units issued as part of InterDigital’s 2025 Equity Incentive Plan and long-term compensation program, not an open-market transaction.

How many InterDigital (IDCC) shares does Julia C. Mattis hold after this Form 4?

After the reported grant, Julia C. Mattis directly holds 13,121.9474 shares of InterDigital common stock. This total includes the 4,140 new shares awarded through restricted stock units under the company’s 2025 Equity Incentive Plan as long-term compensation.

What plan governed the InterDigital (IDCC) restricted stock unit grant to Julia C. Mattis?

The restricted stock unit grant to Julia C. Mattis was made under InterDigital’s 2025 Equity Incentive Plan. The footnote explains that the RSUs were awarded in line with the company’s established long-term compensation program for executives, rather than as a discretionary stock purchase.

What does transaction code "A" mean in the InterDigital (IDCC) Form 4 for Julia C. Mattis?

Transaction code “A” on this Form 4 indicates a grant, award, or other acquisition of stock rather than a market trade. For Julia C. Mattis, it reflects the 4,140-share restricted stock unit award granted under InterDigital’s 2025 Equity Incentive Plan as part of her compensation.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/02/2026 - 06:27 AM Learn about SEC filing dates

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
Estimated average burden
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^*

Mattis Julia C

(Last) (First) (Middle)

200 BELLEVUE PARKWAY

SUITE 300

(Street)

WILMINGTON DELAWARE 19809

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
InterDigital, Inc. [ IDCC ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Licensing Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/31/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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

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	03/31/2026		A(1)		4,140	A	$0	13,121.9474	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. Restricted stock units granted pursuant to the company's 2025 Equity Incentive Plan in accordance with the company's long-term compensation program.

Remarks:

	/s/ Ariel E. Greenstein, Attorney-in-Fact for Julia C. Mattis	04/02/2026
	** 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.
* Form 4: SEC 1474 (03-26)