Anterix (ATEX) CMO Heather Martin receives RSU and stock option grants

Rhea-AI Filing Summary

Anterix Inc. Chief Marketing Officer and Chief of Staff Heather Martin received new equity compensation in the form of restricted stock units and stock options. She was granted 3,694 RSUs representing the right to receive the same number of Anterix common shares, bringing her direct common stock holdings to 38,272 shares after the award.

She was also granted stock options for 17,453 shares of common stock at an exercise price of $60.90 per share, expiring on May 20, 2036. Both the RSUs and the options vest over three years, with one-third vesting on May 20, 2027 and the remaining two-thirds vesting in equal quarterly installments on specified dates through May 20, 2029. These are compensation-related grants, not open-market purchases or sales.

Insights

Equity compensation analyst

Routine equity grants increase the CMO’s long-term incentive exposure.

The filing shows Heather Martin receiving 3,694 restricted stock units and options on 17,453 shares at an exercise price of $60.90 per share. These awards are standard compensation tools that link a senior executive’s upside to future share performance.

The RSUs and options vest over three years, with one-third vesting on May 20, 2027 and the rest quarterly through May 20, 2029. There are no open-market buys or sales, so this primarily updates her incentive alignment rather than signaling a change in her view of the stock.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Martin Heather

Role Chief Marketing Officer

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	17,453	$0.00	--
Grant/Award	Common Stock	3,694	$0.00	--

Holdings After Transaction: Stock Option (Right to Buy) — 17,453 shares (Direct, null); Common Stock — 38,272 shares (Direct, null)

Footnotes (1)

1. Represents the issuance of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Common Stock. The RSUs vest over three years, with 1/3 vesting on May 20, 2027, and 1/12 vesting quarterly thereafter on August 10, November 10, February 10, and May 20 of each year through May 20, 2029. The option shares vest and become exercisable over three years, with 1/3 vesting on May 20, 2027, and 1/12 vesting quarterly thereafter on August 10, November 10, February 10, and May 20 of each year through May 20, 2029.

Key Figures

RSU grant: 3,694 units Options granted: 17,453 shares Option exercise price: $60.90/share +3 more

6 metrics

RSU grant 3,694 units Restricted stock units granted on May 20, 2026

Options granted 17,453 shares Stock options on common stock granted May 20, 2026

Option exercise price $60.90/share Strike price for 17,453 stock options

Option expiration May 20, 2036 Expiration date of granted stock options

Shares held after grant 38,272 shares Total common shares directly held after RSU award

Initial vesting date May 20, 2027 One-third of RSUs and options vest

Key Terms

restricted stock units ("RSUs"), Stock Option (Right to Buy), exercise price, vesting

4 terms

restricted stock units ("RSUs") financial

"Represents the issuance of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

Stock Option (Right to Buy) financial

"security_title": "Stock Option (Right to Buy)""

exercise price financial

"conversion_or_exercise_price": "60.9000""

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

vesting financial

"The RSUs vest over three years, with 1/3 vesting on May 20, 2027, and 1/12 vesting quarterly thereafter"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Martin Heather

(Last) (First) (Middle)

3 GARRET MOUNTAIN PLAZA, SUITE 401

(Street)

WOODLAND PARK NEW JERSEY 07424

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Anterix Inc. [ ATEX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)	X	Other (specify below)
	Chief Marketing Officer		Chief of Staff

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/20/2026		A		3,694(1)	A	$0	38,272	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$60.9	05/20/2026		A		17,453		(2)	05/20/2036	Common Stock	17,453	$0	17,453	D

Explanation of Responses:

1. Represents the issuance of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of Issuer's Common Stock. The RSUs vest over three years, with 1/3 vesting on May 20, 2027, and 1/12 vesting quarterly thereafter on August 10, November 10, February 10, and May 20 of each year through May 20, 2029.

2. The option shares vest and become exercisable over three years, with 1/3 vesting on May 20, 2027, and 1/12 vesting quarterly thereafter on August 10, November 10, February 10, and May 20 of each year through May 20, 2029.

Remarks:

	/s/ Gena L. Ashe, Attorney-in-Fact	05/22/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What equity awards did Anterix (ATEX) grant to Heather Martin in this Form 4?

Heather Martin received 3,694 restricted stock units and stock options on 17,453 shares of Anterix common stock. The options have a strike price of $60.90 per share and represent additional long-term incentive compensation rather than open-market purchases.

How do Heather Martin’s RSUs from Anterix (ATEX) vest over time?

The 3,694 RSUs vest over three years. One-third vests on May 20, 2027, and the remaining two-thirds vest in equal quarterly installments on August 10, November 10, February 10, and May 20 each year through May 20, 2029.

What are the terms of Heather Martin’s new Anterix (ATEX) stock options?

Heather Martin received options for 17,453 Anterix common shares at an exercise price of $60.90, expiring May 20, 2036. These options vest over three years, following the same one-third initial vesting and quarterly schedule as the restricted stock units.

Did Heather Martin buy or sell Anterix (ATEX) shares in the open market?

No open-market buys or sells are reported. The Form 4 shows compensation-related grants: 3,694 restricted stock units and options on 17,453 shares. These awards were acquired at no cash cost to her as part of her executive compensation package.

What is Heather Martin’s Anterix (ATEX) common stock holding after the RSU grant?

After the grant of 3,694 restricted stock units, Heather Martin directly holds 38,272 shares of Anterix common stock. This figure reflects her position following the reported award and underscores her equity-based alignment with the company’s long-term performance.