SEC Form 4 · accession 0001828490-26-000019
Anterix Inc. · ATEX
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Christopher Guttman-McCabe
Officer — Chief Reg & Comm Officer
Period of report
Aug 25, 2026
Accepted (ET)
Aug 27, 2026 · 4:44 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 Stock | Aug 25, 2026 | M | 40,000 | $34.72 | A | 84,876 | D | |
| Common StockF1 | Aug 25, 2026 | F | 16,561 | $90.38 | D | 68,315 | D | |
| Common StockF2 | Aug 25, 2026 | S | 5,372 | $93.5863 | D | 62,943 | D | |
| Common StockF3 | Aug 25, 2026 | S | 7,791 | $92.7691 | D | 55,152 | D | |
| Common StockF4 | Aug 25, 2026 | S | 7,580 | $91.6945 | D | 47,572 | D | |
| Common StockF5 | Aug 25, 2026 | S | 2,696 | $90.6095 | D | 44,876 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (Right to Buy)F6 | $37.42 | Aug 25, 2026 | M | 40,000 | D | — | Feb 28, 2034 | Common Stock | 40,000 | 0 | D |
Explanation of responses
- F1The Reporting Person exercised a stock option to purchase 40,000 shares of the Issuer's Common Stock for $37.42 per share and paid the exercise price on a cashless basis, resulting in the Issuer withholding an aggregate of 16,561 shares of the Issuer's Common Stock subject to the stock option to pay the exercise price and to satisfy its income tax withholding and remittance obligations in connection with the exercise of the stock option. The withholding of shares referenced here does not involve an open market sale of stock.
- F2The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $94.215 to $93.27, 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.
- F3The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $93.265 to $92.265, 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 $92.205 to $91.22, 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 $91.01 to $90.06, 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 option shares are fully vested.