[Form 3] InterDigital, Inc. Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

InterDigital, Inc. (IDCC) Form 3 discloses that Julia C. Mattis, serving as a director and Chief Licensing Officer, beneficially owns 7,461 shares of common stock as of the 09/17/2025 event date. The shares are held directly and consist of restricted stock units granted under the companys 2017 and 2025 Equity Incentive Plans plus dividend equivalents credited on unvested RSUs. The filing was signed by an attorney-in-fact on 09/19/2025.

Insights

Financial Analyst

TL;DR Routine initial beneficial ownership filing showing a direct holding of 7,461 shares in InterDigital by an officer/director.

This Form 3 records an initial disclosure of equity ownership by Julia C. Mattis, combining RSUs from two equity plans and dividend equivalents. The disclosure confirms direct ownership and does not report derivative holdings or transactions. For investors, this is a standard securities-disclosure item without financial performance metrics or material corporate actions.

Corporate Governance Expert

TL;DR Governance disclosure: officer/director initial ownership of RSUs reported; no indications of changes to control or derivative positions.

The filing identifies Mattis as both a director and the Chief Licensing Officer and documents the source of the shares as company RSU grants and dividend equivalents under the 2017 and 2025 Equity Incentive Plans. The form is an initial statement and contains no amendments or reported exercises, options, or other derivative securities.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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1. Name and Address of Reporting Person^*

Mattis Julia C

(Last) (First) (Middle)

200 BELLEVUE PARKWAY

SUITE 300

(Street)

WILMINGTON DE 19809

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
09/17/2025

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

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

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

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	7,461(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Consists of restricted stock units granted pursuant to the company's 2017 and 2025 Equity Incentive Plans and restricted stock units received pursuant to dividend equivalents credited on unvested restricted stock units held by the reporting person. Dividend equivalents accrue with respect to unvested restricted stock units when and as cash dividends are paid on the company's common stock.

Remarks:

	/s/ Ariel E. Greenstein, Attorney-in-Fact for Julia C. Mattis	09/19/2025
	** 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 5 (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 does Julia C. Mattis disclose in the Form 3 for IDCC?

The Form 3 discloses that Julia C. Mattis directly owns 7,461 shares of InterDigital common stock, comprised of restricted stock units and dividend equivalents.

What is Julia C. Mattiss role at InterDigital (IDCC)?

The filing lists Julia C. Mattis as a Director and Officer, with the officer title given as Chief Licensing Officer.

When is the event date reported on the Form 3 for IDCC?

The Date of Event Requiring Statement is 09/17/2025 and the form was signed by attorney-in-fact on 09/19/2025.

Are any derivative securities reported by Julia C. Mattis on this Form 3?

No. Table II for derivative securities contains no reported exercisable or convertible derivative holdings in this filing.

What is the origin of the shares reported on the Form 3?

The shares consist of restricted stock units granted under the company's 2017 and 2025 Equity Incentive Plans and restricted stock units received as dividend equivalents on unvested RSUs.