Jeffrey A. Altman - 04 Aug 2026 Form 4 Insider Report for Anterix Inc. (ATEX)

Reporting relationship: Director, 10%+ Owner
Issuer ticker: ATEX
Reported as of: 04 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 06 Aug 2026, 16:37:59 UTC
Prior SEC filing: 07 Aug 2025
Source filing: View source filing
Reporting owner signature: By: /s/ Jeffrey A. Altman

Key filing fact

Jeffrey A. Altman filed Form 4 for Anterix Inc. (ATEX) on 06 Aug 2026.

Key facts

This page summarizes Jeffrey A. Altman's Form 4 filing for Anterix Inc. (ATEX).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 06 Aug 2026, 16:37.

Change

Previous filing in this sequence was filed on 07 Aug 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (2)

CIK 0001269751 Primary reporting owner

ALTMAN JEFFREY A

Relationship: Director, 10%+ Owner
Address: C/O OWL CREEK ASSET MANAGEMENT, L.P., 640 FIFTH AVENUE, 20TH FLOOR, NEW YORK
Signature: By: /s/ Jeffrey A. Altman
Signature date: 06 Aug 2026

CIK 0001313756

Owl Creek Asset Management, L.P.

Relationship: 10%+ Owner
Address: 640 FIFTH AVENUE, 20TH FLOOR, NEW YORK
Signature: Owl Creek Asset Management, L.P. Owl Creek Asset Management, L.P. By: /s/ Jeffrey A. Altman, Managing Member
Signature date: 06 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ATEX transaction

Common Stock, par value $0.0001 per share ("Common Stock")

Award

Transaction value
Shares: +1,598
Change %: +10%
Price: $0.000000^*
Shares after: 17,014
Date: 04 Aug 2026
Ownership: Direct
Footnotes: F1, F2, F5

ATEX transaction

Common Stock, par value $0.0001 per share ("Common Stock")

Award

Transaction value
Shares: +1,598
Change %: +10%
Price: $0.000000^*
Shares after: 17,014
Date: 04 Aug 2026
Ownership: Direct
Footnotes: F1, F2, F5

ATEX holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 124,492
Date: 04 Aug 2026
Ownership: Direct
Footnotes: F3, F5

ATEX holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 124,492
Date: 04 Aug 2026
Ownership: Direct
Footnotes: F3, F5

ATEX holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,411,776
Date: 04 Aug 2026
Ownership: See footnotes
Footnotes: F4, F5

ATEX holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,411,776
Date: 04 Aug 2026
Ownership: See footnotes
Footnotes: F4, F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

The shares of Common Stock will vest on the earlier of the 2027 Annual Meeting of shareholders and August 4, 2027, subject to the terms of the Restricted Stock Agreement.

Footnote F2

Represents securities granted to Jeffrey Altman ("Mr. Altman" or the "Reporting Person") as compensation for his services as a non-employee director on the Issuer's board of directors. Mr. Altman may be deemed to hold the securities reported herein for the benefit of certain funds (the "Owl Creek Funds") to which Owl Creek Asset Management, L.P., a Delaware limited partnership (the "Investment Manager"), serves as investment manager.

Footnote F3

Represents shares of Common Stock directly held by Mr. Altman.

Footnote F4

These securities are held by the Owl Creek Funds. Mr. Altman is the managing member of the general partner of the Investment Manager.

Footnote F5

Each of the Investment Manager and Mr. Altman disclaims beneficial ownership of the securities to which this filing relates for purposes of Section 16 of the Securities and Exchange Act of 1934, as amended, except to the extent of his or its pecuniary interest therein, if any.

SEC remarks

The Investment Manager may be deemed to be a director by deputization for purposes of Section 16 under the Securities Exchange Act of 1934 by virtue of the fact that Mr. Altman currently serves on the board of directors of the Issuer.