Julia C. Mattis

CIK: 0002086712

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)1 (6.7%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)8 (53.3%)

Compensation grants

Other (G, F, J, C, D, …)6 (40.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

IDCC

InterDigital, Inc.

Officer

Discretionary Trading P&L

Holdings

Transaction History (15 total)

IDCC
InterDigital, Inc.
Oct 28, 2026
Award(A)
Direct
19 shares-
IDCC
InterDigital, Inc.
Sep 15, 2026
Disposition(D)
Direct
1 shares at avg. $340.38$279.963
IDCC
InterDigital, Inc.
Sep 15, 2026
Tax Payment(F)
Direct
325 shares at avg. $340.38$111K
IDCC
InterDigital, Inc.
Jul 22, 2026
Award(A)
Direct
24 shares-
IDCC
InterDigital, Inc.
Jun 3, 2026
Sale(S)
Direct
1.6K shares at avg. $257.65$412K
IDCC
InterDigital, Inc.
Apr 22, 2026
Award(A)
Direct
16 shares-
IDCC
InterDigital, Inc.
Mar 31, 2026
Award(A)
Direct
4.1K shares-
IDCC
InterDigital, Inc.
Mar 15, 2026
Disposition(D)
Direct
2 shares at avg. $362.35$598.82
IDCC
InterDigital, Inc.
Mar 15, 2026
Award(A)
Direct
2.5K shares-
IDCC
InterDigital, Inc.
Mar 15, 2026
Tax Payment(F)
Direct
1.1K shares at avg. $362.35$380K
IDCC
InterDigital, Inc.
Mar 15, 2026
Disposition(D)
Direct
0 shares at avg. $362.35$96.892
IDCC
InterDigital, Inc.
Mar 15, 2026
Tax Payment(F)
Direct
993 shares at avg. $362.35$360K
IDCC
InterDigital, Inc.
Jan 28, 2026
Award(A)
Direct
16 shares-
IDCC
InterDigital, Inc.
Dec 15, 2025
Award(A)
Direct
1.1K shares-
IDCC
InterDigital, Inc.
Oct 22, 2025
Award(A)
Direct
12 shares-

		Type	Shares	Price		Ownership
Oct 28, 2026	IDCC InterDigital, Inc.	Award(A)	19	-	$0	Direct
Sep 15, 2026	IDCC InterDigital, Inc.	Disposition(D)	1	$340.38	$280	Direct
Sep 15, 2026	IDCC InterDigital, Inc.	Tax Payment(F)	325	$340.38	$110,624	Direct
Jul 22, 2026	IDCC InterDigital, Inc.	Award(A)	24	-	$0	Direct
Jun 3, 2026	IDCC InterDigital, Inc.	Sale(S)	1,600	$257.65	$412,240	Direct
Apr 22, 2026	IDCC InterDigital, Inc.	Award(A)	16	-	$0	Direct
Mar 31, 2026	IDCC InterDigital, Inc.	Award(A)	4,140	-	$0	Direct
Mar 15, 2026	IDCC InterDigital, Inc.	Disposition(D)	2	$362.35	$599	Direct
Mar 15, 2026	IDCC InterDigital, Inc.	Award(A)	2,470	-	$0	Direct
Mar 15, 2026	IDCC InterDigital, Inc.	Tax Payment(F)	1,050	$362.35	$380,468	Direct
Mar 15, 2026	IDCC InterDigital, Inc.	Disposition(D)	0	$362.35	$97	Direct
Mar 15, 2026	IDCC InterDigital, Inc.	Tax Payment(F)	993	$362.35	$359,814	Direct
Jan 28, 2026	IDCC InterDigital, Inc.	Award(A)	16	-	$0	Direct
Dec 15, 2025	IDCC InterDigital, Inc.	Award(A)	1,068	-	$0	Direct
Oct 22, 2025	IDCC InterDigital, Inc.	Award(A)	12	-	-	Direct

1-15 of 15 transactions

About Mattis Julia C

Mattis Julia C (SEC CIK 0002086712) files insider reports with the SEC as Chief Licensing Officer of InterDigital, Inc. (IDCC).

Signal8 holds 11 ownership filings by Mattis Julia C (1 Form 3, 10 Form 4), filed between Sep 19, 2025 and Oct 30, 2026. Those filings report 15 transactions, from Oct 22, 2025 to Oct 28, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Mattis Julia C's filings is in WILMINGTON, DE.

Recent filings by Mattis Julia C

Oct 28, 2026: Grant or award of IDCC shares (Form 4, code A).
Sep 15, 2026: Disposition to issuer transaction of IDCC shares (Form 4, code D).
Sep 15, 2026: Tax withholding of IDCC shares (Form 4, code F).
Jul 22, 2026: Grant or award of IDCC shares (Form 4, code A).
Jun 3, 2026: Open-market sale of IDCC shares (Form 4, code S).

Other insiders filing for InterDigital, Inc. (IDCC)

ABERLE DEREK K, Director
RANKIN JEAN F, Director
Gillman Joan H, Director
KRITZMACHER JOHN A, Director
Markley John D. Jr., Director
Schmidt Joshua D., CLO & Corp Secretary

How to read Form 4 transaction codes