Julia C. Mattis - 15 Sep 2026 Form 4 Insider Report for InterDigital, Inc. (IDCC)

Reporting relationship: Chief Licensing Officer
Issuer ticker: IDCC
Reported as of: 15 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 17 Sep 2026, 07:59:37 UTC
Prior SEC filing: 24 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Ariel E. Greenstein, Attorney-in-Fact for Julia C. Mattis

Key filing fact

Julia C. Mattis filed Form 4 for InterDigital, Inc. (IDCC) on 17 Sep 2026.

Key facts

This page summarizes Julia C. Mattis's Form 4 filing for InterDigital, Inc. (IDCC).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 17 Sep 2026, 07:59.

Change

Previous filing in this sequence was filed on 24 Jul 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002086712 Primary reporting owner

Mattis Julia C

Relationship: Chief Licensing Officer
Address: 200 BELLEVUE PARKWAY, SUITE 300, WILMINGTON
Signature: /s/ Ariel E. Greenstein, Attorney-in-Fact for Julia C. Mattis
Signature date: 17 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

IDCC transaction

Common Stock

Tax liability

Transaction value
Shares: -325
Change %: -2.8%
Price: $340.38^*
Shares after: 11,237
Date: 15 Sep 2026
Ownership: Direct
Footnotes: F1

IDCC transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -1
Change %: -0.01%
Price: $340.38^*
Shares after: 11,236
Date: 15 Sep 2026
Ownership: Direct
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

The transaction reported reflects the withholding of restricted stock units in satisfaction of the reporting person's tax liability. The restricted stock units were granted to the reporting person on September 15, 2024 pursuant to the company's 2017 Equity Incentive Plan in accordance with the company's long-term compensation program and vested on September 15, 2026, together with accrued dividend equivalents.

Footnote F2

The transaction reported reflects the cash settlement of fractional shares in connection with the vesting of restricted stock units, as described in the previous footnote.