SEC Form 4 reporting owner

Mattis Julia C

Mattis Julia C has filed 13 Form 4 transactions reported between December 15, 2025 and September 15, 2026, as Chief Licensing Officer of InterDigital, Inc..

Name as filed: Mattis Julia C

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$412K

1 lines

Companies

with Form 4 filings

Latest transaction

Sep 15, 2026

transaction date

Roles and reported holdings

IDCCInterDigital, Inc.
Dec 15, 2025 – Sep 15, 2026
Chief Licensing Officer
Held directly11,237 sh as of Sep 15, 2026 · Form 4
24 months: $412K sold

Transaction history

All 13 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Sep 15, 2026	IDCCChief Licensing Officer	Disposition to issuerCode D · direct	1	$340.38	$280@ $340.38	11,236	Form 4
Sep 15, 2026	IDCCChief Licensing Officer	Shares withheld for tax or exercise priceCode F · direct	325	$340.38	$111K@ $340.38	11,237	Form 4
Jul 22, 2026	IDCCChief Licensing Officer	Grant or awardCode A · direct	24	—	—	11,562	Form 4
Jun 3, 2026	IDCCChief Licensing Officer	Open-market saleCode S · direct	1,600	$257.65	$412K@ $257.65	11,538	Form 4
Apr 22, 2026	IDCCChief Licensing Officer	Grant or awardCode A · direct	16	—	—	13,138	Form 4
Mar 31, 2026	IDCCChief Licensing Officer	Grant or awardCode A · direct	4,140	—	—	13,122	Form 4
Mar 15, 2026	IDCCChief Licensing Officer	Disposition to issuerCode D · direct	2	$362.35	$599@ $362.35	8,982	Form 4
Mar 15, 2026	IDCCChief Licensing Officer	Shares withheld for tax or exercise priceCode F · direct	993	$362.35	$360K@ $362.35	8,984	Form 4
Mar 15, 2026	IDCCChief Licensing Officer	Disposition to issuerCode D · direct	0	$362.35	$97@ $362.35	9,977	Form 4
Mar 15, 2026	IDCCChief Licensing Officer	Shares withheld for tax or exercise priceCode F · direct	1,050	$362.35	$380K@ $362.35	9,977	Form 4
Mar 15, 2026	IDCCChief Licensing Officer	Grant or awardCode A · direct	2,470	—	—	11,027	Form 4
Jan 28, 2026	IDCCChief Licensing Officer	Grant or awardCode A · direct	16	—	—	8,557	Form 4
Dec 15, 2025	IDCCChief Licensing Officer	Grant or awardCode A · direct	1,068	—	—	8,541	Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.