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  4. [Form 4/A] Anterix Inc. Amended Insider Trading Activity

Anterix Inc. (ATEX) officer updates Form 4/A after 122,852-share stock sale

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4/A

Rhea-AI Filing Summary

Anterix Inc. insider Christopher Guttman-McCabe, Chief Reg & Comm Officer, reported multiple open-market sales of common stock on June 15, 2026 totaling 122,852 shares at weighted average prices between $78.7255 and $84.4012 per share. A Form 4/A amendment corrects the originally reported amounts, reflecting an additional 31,415 shares sold and revised beneficial ownership figures.

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Insider Guttman-McCabe Christopher
Role Chief Reg & Comm Officer
Sold 122,852 shs ($10.04M)
Type Security Shares Price Value
Sale Common Stock F1, F2 11,668 $78.7255 $919K
Sale Common Stock F3, F2 5,030 $79.5296 $400K
Sale Common Stock F4, F2 21,434 $80.6322 $1.73M
Sale Common Stock F5, F2 34,870 $81.5097 $2.84M
Sale Common Stock F6, F2 21,045 $82.3878 $1.73M
Sale Common Stock F7, F2 21,050 $83.8596 $1.77M
Sale Common Stock F8, F2 7,755 $84.4012 $655K
Holdings After Transaction: Common Stock — 46,392 shares (Direct)
Footnotes (8)
  1. F1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $78.07 to $79.07, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4.
  2. F2. This Form 4/A amends the Form 4 filed by the reporting person on June 17, 2026 (the "Original Form 4"), which due to a clerical error inadvertently reported the incorrect number of securities sold in column 4 of Table I and the amount of shares beneficially owned in column 5 of Table I. This Form 4/A is being filed solely to correct the number of securities reported in column 4 and column 5 of Table II to reflect that an additional 31,415 shares were sold. No other amendments or changes have been made to the Original Form 4, except as reported in the Form 4/A filed by the Reporting Person on July 10, 2026.
  3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $79.085 to $80.035, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4.
  4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $80.085 to $81.07, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4.
  5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.09 to $82.035, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4.
  6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $82.14 to $83.095, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4.
  7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.225 to $84.21, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4.
  8. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $84.23 to $84.90, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4.
Total shares sold 122,852 shares Aggregate common stock sales by Christopher Guttman-McCabe on June 15, 2026
Number of sale transactions 7 Separate open-market sales of Anterix common stock on June 15, 2026
Weighted average sale price $78.7255 per share One of the reported weighted average prices for the June 15, 2026 sales
Highest weighted average price $84.4012 per share Highest weighted average sale price reported among the June 15, 2026 transactions
Additional shares sold on correction 31,415 shares Extra shares the amendment states were sold beyond the original Form 4 report
Sell count 7 SellCount from transaction summary indicating all reported transactions were sales
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
Form 4/A regulatory
"This Form 4/A amends the Form 4 filed by the reporting person"
Form 4/A is an amended filing that corrects or updates an earlier Form 4, the mandatory report that insiders (like company executives, directors, or large shareholders) must file when their ownership stakes change. Think of it as an edited receipt showing who bought or sold stock and when; investors use it to track insider confidence, detect potential conflicts, and spot trading patterns that might signal future company prospects.
beneficially owned financial
"reported the incorrect number of securities sold ... and the amount of shares beneficially owned"
Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.
open market or private transaction financial
"Sale in open market or private transaction"

FAQ

What insider transaction did Anterix Inc. (ATEX) report in this Form 4/A?
Anterix Inc. reported that officer Christopher Guttman-McCabe sold 122,852 shares of common stock on June 15, 2026. The sales occurred in multiple open-market transactions at various weighted average prices disclosed in the amendment.

Why was this Anterix Inc. (ATEX) filing submitted as a Form 4/A amendment?
The filing is a Form 4/A amendment to correct a prior Form 4 that contained clerical errors in the number of securities sold and the amount of shares beneficially owned. It also reflects that an additional 31,415 shares were sold.

How many Anterix Inc. (ATEX) shares did Christopher Guttman-McCabe sell and on what date?
Christopher Guttman-McCabe sold a total of 122,852 shares of Anterix Inc. common stock on June 15, 2026. The sales were reported across seven separate open-market transactions at different weighted average prices.

What price ranges applied to the Anterix Inc. (ATEX) insider stock sales in this Form 4/A?
The reported sales used weighted average prices, with per-share values including $78.7255, $79.5296, $80.6322, $81.5097, $82.3878, $83.8596, and $84.4012. Footnotes state each average covers multiple trades within specified price ranges.

Does this Anterix Inc. (ATEX) Form 4/A mention a Rule 10b5-1 trading plan?
The filing indicates the Rule 10b5-1 checkbox is not marked as affirming a trading plan. The footnotes describe weighted average prices and a correction to prior reporting, but do not state that these transactions were made under a Rule 10b5-1 plan.

What specific correction does the Anterix Inc. (ATEX) Form 4/A make to the original Form 4?
The amendment states the original Form 4 inadvertently reported incorrect securities sold and beneficially owned amounts. It corrects column 4 and column 5 entries and clarifies that an additional 31,415 shares were sold beyond what was first reported.

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Reg & Comm Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/15/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)
06/17/2026
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)
CodeVAmount(A) or (D)Price
Common Stock06/15/2026S11,668D$78.7255(1)157,576(2)D
Common Stock06/15/2026S5,030D$79.5296(3)152,546(2)D
Common Stock06/15/2026S21,434D$80.6322(4)131,112(2)D
Common Stock06/15/2026S34,870D$81.5097(5)96,242(2)D
Common Stock06/15/2026S21,045D$82.3878(6)75,197(2)D
Common Stock06/15/2026S21,050D$83.8596(7)54,147(2)D
Common Stock06/15/2026S7,755D$84.4012(8)46,392(2)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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $78.07 to $79.07, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4.
2. This Form 4/A amends the Form 4 filed by the reporting person on June 17, 2026 (the "Original Form 4"), which due to a clerical error inadvertently reported the incorrect number of securities sold in column 4 of Table I and the amount of shares beneficially owned in column 5 of Table I. This Form 4/A is being filed solely to correct the number of securities reported in column 4 and column 5 of Table II to reflect that an additional 31,415 shares were sold. No other amendments or changes have been made to the Original Form 4, except as reported in the Form 4/A filed by the Reporting Person on July 10, 2026.
3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $79.085 to $80.035, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4.
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $80.085 to $81.07, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.09 to $82.035, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $82.14 to $83.095, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.225 to $84.21, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4.
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $84.23 to $84.90, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4.
Remarks:
/s/ Gena L. Ashe08/13/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR