Anterix (ATEX) executive has 1,426 RSU shares withheld to cover taxes

Rhea-AI Filing Summary

Anterix Inc.'s Chief Reg & Comm Officer Christopher Guttman-McCabe reported a routine tax-related share disposition. On the RSU vesting date, 1,426 shares of common stock were withheld by Anterix at $57.06 per share to satisfy withholding obligations tied to the partial vesting and settlement of restricted stock units.

This was not an open-market sale but an automatic tax-withholding disposition connected to equity compensation. After this transaction, Guttman-McCabe directly holds 41,466 shares of Anterix common stock, indicating he retains a meaningful equity stake in the company.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Guttman-McCabe Christopher

Role Chief Reg & Comm Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	1,426	$57.06	$81K

Holdings After Transaction: Common Stock — 41,466 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares withheld for taxes: 1,426 shares Withholding price per share: $57.06 per share Shares held after transaction: 41,466 shares

3 metrics

Shares withheld for taxes 1,426 shares Tax-withholding disposition on restricted stock unit vesting

Withholding price per share $57.06 per share Value used for withheld Anterix common shares

Shares held after transaction 41,466 shares Direct holdings of Christopher Guttman-McCabe following Form 4

Key Terms

restricted stock units, withholding obligations, tax-withholding disposition

3 terms

restricted stock units financial

"in connection with the partial vesting and settlement of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

withholding obligations financial

"withheld by the Issuer to satisfy withholding obligations in connection with"

tax-withholding disposition financial

"transaction_action": "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

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^*

Guttman-McCabe Christopher

(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)		Other (specify below)
	Chief Reg & Comm Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/18/2026

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	05/18/2026		F		1,426(1)	D	$57.06	41,466	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

Explanation of Responses:

1. The shares were withheld by the Issuer to satisfy withholding obligations in connection with the partial vesting and settlement of restricted stock units.

Remarks:

	s/ Gena L. Ashe, Attorney-in-Fact	05/20/2026
	** 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 insider transaction did Anterix (ATEX) report for Christopher Guttman-McCabe?

Anterix reported that Chief Reg & Comm Officer Christopher Guttman-McCabe had 1,426 common shares withheld. The shares were used to cover tax obligations related to the partial vesting and settlement of restricted stock units, rather than being sold on the open market.

Was the Anterix (ATEX) Form 4 transaction an open-market sale?

No, the Form 4 transaction was not an open-market sale. The 1,426 Anterix common shares were withheld by the company to satisfy tax withholding obligations associated with restricted stock unit vesting, a standard equity compensation and payroll-tax mechanism.

How many Anterix (ATEX) shares were withheld and at what price per share?

Anterix withheld 1,426 shares of common stock from Christopher Guttman-McCabe at $57.06 per share. This tax-withholding disposition covered obligations arising from the partial vesting and settlement of his restricted stock units under the company’s equity compensation arrangements.

How many Anterix (ATEX) shares does Christopher Guttman-McCabe hold after this Form 4?

Following the tax-withholding transaction, Christopher Guttman-McCabe directly holds 41,466 Anterix common shares. This post-transaction balance reflects his remaining equity position after 1,426 shares were withheld to cover tax obligations tied to restricted stock unit vesting.

What is the significance of the restricted stock unit vesting in Anterix (ATEX) Form 4?

The Form 4 shows that restricted stock units partially vested and settled for Christopher Guttman-McCabe. As part of that process, 1,426 shares were withheld at $57.06 per share to satisfy tax withholding obligations, a common feature of equity-based executive compensation programs.