SEC Form 4/A · accession 0001828490-26-000016
Anterix Inc. · ATEX
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
This is an amendment (Form 4/A). It replaces an earlier filing for the same period.
Reporting owner
Christopher Guttman-McCabe
Officer — Chief Reg & Comm Officer
Period of report
Jun 15, 2026
Accepted (ET)
Aug 14, 2026 · 4:37 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001304492
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1,F2 | Jun 15, 2026 | S | 11,668 | $78.7255 | D | 157,576 | D | |
| Common StockF3,F2 | Jun 15, 2026 | S | 5,030 | $79.5296 | D | 152,546 | D | |
| Common StockF4,F2 | Jun 15, 2026 | S | 21,434 | $80.6322 | D | 131,112 | D | |
| Common StockF5,F2 | Jun 15, 2026 | S | 34,870 | $81.5097 | D | 96,242 | D | |
| Common StockF6,F2 | Jun 15, 2026 | S | 21,045 | $82.3878 | D | 75,197 | D | |
| Common StockF7,F2 | Jun 15, 2026 | S | 21,050 | $83.8596 | D | 54,147 | D | |
| Common StockF8,F2 | Jun 15, 2026 | S | 7,755 | $84.4012 | D | 46,392 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1The 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.
- F2This 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.
- F3The 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.
- F4The 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.
- F5The 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.
- F6The 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.
- F7The 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.
- F8The 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.