Heather Martin

CIK: 0002090798

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)1 (33.3%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)1 (33.3%)

Compensation grants

Other (G, F, J, C, D, …)1 (33.3%)

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

Companies & Roles (1)

ATEX

Anterix Inc.

Officer

Discretionary Trading P&L

Holdings

Transaction History (3 total)

ATEX
Anterix Inc.
Sep 10, 2026
Sale(S)
Direct
8.1K shares at avg. $84.20$679K
ATEX
Anterix Inc.
Sep 9, 2026
Tax Payment(F)
Direct
3.5K shares at avg. $85.44$296K
ATEX
Anterix Inc.
May 20, 2026
Award(A)
Direct
3.7K shares-

		Type	Shares	Price		Ownership
Sep 10, 2026	ATEX Anterix Inc.	Sale(S)	8,064	$84.20	$678,998	Direct
Sep 9, 2026	ATEX Anterix Inc.	Tax Payment(F)	3,465	$85.44	$296,050	Direct
May 20, 2026	ATEX Anterix Inc.	Award(A)	3,694	-	$0	Direct

1-3 of 3 transactions

About Martin Heather

Martin Heather (SEC CIK 0002090798) files insider reports with the SEC as Chief Marketing Officer of Anterix Inc. (ATEX).

Signal8 holds 3 ownership filings by Martin Heather (1 Form 3, 2 Form 4), filed between Nov 4, 2025 and Sep 11, 2026. Those filings report 3 transactions, from May 20, 2026 to Sep 10, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Martin Heather's filings is in WOODLAND PARK, NJ.

Recent filings by Martin Heather

Sep 10, 2026: Open-market sale of ATEX shares (Form 4, code S).
Sep 9, 2026: Tax withholding of ATEX shares (Form 4, code F).
May 20, 2026: Grant or award of ATEX shares (Form 4, code A).

Other insiders filing for Anterix Inc. (ATEX)

Marquez Elena, Chief Financial Officer
Lang Scott A., President and CEO
Ashe Gena L, Chief Legal Officer & Corp Sec
DANIELS LESLIE B, Director
Guttman-McCabe Christopher, Chief Reg & Comm Officer
Kuhn Thomas R., Director

How to read Form 4 transaction codes