Dennis Mathew

CIK: 0001946788

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)1 (14.3%)

Compensation grants

Other (G, F, J, C, D, …)6 (85.7%)

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

Companies & Roles (1)

OPTU

Optimum Communications, Inc.

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (7 total)

OPTU
Optimum Communications, Inc.
Oct 26, 2026
Tax Payment(F)
Direct
220K shares at avg. $0.66$145K
OPTU
Optimum Communications, Inc.
May 29, 2026
Disposition(D)
Direct
550.8K shares-
OPTU
Optimum Communications, Inc.
Feb 27, 2026
Tax Payment(F)
Direct
484K shares at avg. $1.42$687K
ATUS
Altice USA, Inc.
Oct 24, 2025
Tax Payment(F)
Direct
220K shares at avg. $2.17$477K
ATUS
Altice USA, Inc.
Mar 18, 2025
Award(A)
Direct
1.9M shares-
ATUS
Altice USA, Inc.
Mar 1, 2025
Tax Payment(F)
Direct
114.2K shares at avg. $2.87$328K
ATUS
Altice USA, Inc.
Oct 25, 2024
Tax Payment(F)
Direct
440.1K shares at avg. $2.44$1.1M

		Type	Shares	Price		Ownership
Oct 26, 2026	OPTU Optimum Communications, Inc.	Tax Payment(F)	220,043	$0.66	$145,228	Direct
May 29, 2026	OPTU Optimum Communications, Inc.	Disposition(D)	550,800	-	$0	Direct
Feb 27, 2026	OPTU Optimum Communications, Inc.	Tax Payment(F)	484,042	$1.42	$687,340	Direct
Oct 24, 2025	ATUS Altice USA, Inc.	Tax Payment(F)	220,043	$2.17	$477,493	Direct
Mar 18, 2025	ATUS Altice USA, Inc.	Award(A)	1,893,939	-	-	Direct
Mar 1, 2025	ATUS Altice USA, Inc.	Tax Payment(F)	114,227	$2.87	$327,831	Direct
Oct 25, 2024	ATUS Altice USA, Inc.	Tax Payment(F)	440,087	$2.44	$1,073,812	Direct

1-7 of 7 transactions

About Mathew Dennis

Mathew Dennis (SEC CIK 0001946788) files insider reports with the SEC as Chairman and CEO of Optimum Communications, Inc. (OPTU).

Signal8 holds 7 ownership filings by Mathew Dennis, all Form 4s, filed between Oct 29, 2024 and Oct 28, 2026. Those filings report 7 transactions, from Oct 25, 2024 to Oct 26, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Mathew Dennis's filings is in LONG ISLAND CITY, NY.

Recent filings by Mathew Dennis

Oct 26, 2026: Tax withholding of OPTU shares (Form 4, code F).
May 29, 2026: Disposition to issuer transaction of OPTU shares (Form 4, code D).
Feb 27, 2026: Tax withholding of OPTU shares (Form 4, code F).
Oct 24, 2025: Tax withholding of ATUS shares (Form 4, code F).
Mar 18, 2025: Grant or award of ATUS shares (Form 4, code A).

Other insiders filing for Optimum Communications, Inc. (OPTU)

SUBIN NEIL S, 10% Owner
Welton Adriana Rios, General Counsel & CCRO
Olsen Michael, General Counsel and CCRO
Goei Dexter, Director
Sirota Marc, Chief Financial Officer
Parker Michael C., President of Consumer Services

How to read Form 4 transaction codes