Anterix (ATEX) director sells 3,500 shares in open market trade

Rhea-AI Filing Summary

Anterix Inc. director Mark Fleischhauer reported an open-market sale of 3,500 shares of Common Stock on June 15, 2026 at an average price of $79.8294 per share. Following this transaction, he directly holds 12,769 Anterix common shares.

Insider Trade Summary

Net Seller: 3,500 shares ($279,403)

Net Sell 1 txn

Insider Fleischhauer Mark

Role null

Sold 3,500 shs ($279K)

Type	Security	Shares	Price	Value
Sale	Common Stock	3,500	$79.8294	$279K

Holdings After Transaction: Common Stock — 12,769 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 3,500 shares Sale price: $79.8294 per share Shares held after sale: 12,769 shares

3 metrics

Shares sold 3,500 shares Open-market sale of Anterix Common Stock on June 15, 2026

Sale price $79.8294 per share Average sale price for the 3,500 sold shares

Shares held after sale 12,769 shares Direct Anterix Common Stock holdings following the transaction

Key Terms

open-market sale, Common Stock, non-derivative

3 terms

open-market sale financial

"The transaction is described as an open-market sale of 3,500 shares."

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

"The Form 4 lists the traded security title as Common Stock."

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

non-derivative financial

"The filing classifies the transaction as a non-derivative security trade."

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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^*

Fleischhauer Mark

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/15/2026

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	06/15/2026		S		3,500	D	$79.8294	12,769	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:

Remarks:

	s/ Gena L. Ashe, Attorney-in-Fact	06/16/2026
	** 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 Mark Fleischhauer?

Anterix reported that director Mark Fleischhauer sold 3,500 shares of Common Stock in an open-market transaction. The sale occurred at an average price of $79.8294 per share, as disclosed in the Form 4 insider filing.

How many Anterix (ATEX) shares did Mark Fleischhauer sell and at what price?

Mark Fleischhauer sold 3,500 Anterix Common Stock shares at an average price of $79.8294 per share. The Form 4 classifies this as an open-market sale of non-derivative securities by a company director.

How many Anterix (ATEX) shares does Mark Fleischhauer hold after the sale?

After the reported open-market sale, Mark Fleischhauer directly holds 12,769 Anterix Common Stock shares. This post-transaction balance is disclosed in the Form 4 under total shares following the transaction.

Was the Anterix (ATEX) insider trade a buy or sell transaction?

The insider trade was a sell transaction. The Form 4 lists the transaction code as “S” and describes it as an open-market sale of 3,500 shares of Anterix Common Stock by director Mark Fleischhauer.

What type of security did Mark Fleischhauer trade in the Anterix (ATEX) filing?

Mark Fleischhauer traded Anterix Common Stock, classified as a non-derivative security. The Form 4 notes a single open-market sale of 3,500 common shares and confirms his remaining direct holdings afterward.