Updated Jul 16, 2026 · Last SEC filing 2026-07-14
Anterix Inc. (ATEX) has filed 19 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-14. 3 Form 8-K material event filings were reported by ATEX in the last 90 days. 4 Form 144 notices of proposed sale were filed for ATEX stock. InsiderAlpha tracks every ATEX SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SEC CIK | 0001304492 |
|---|
| Form 4 filings (90d) | 19 |
|---|---|
| Form 8-K filings (90d) | 3 |
| Form 144 notices (90d) | 4 |
| Latest Form 4 filing | 2026-07-14 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Marquez Elena | Chief Financial Officer | F — Tax withholding / forfeiture | 231 | $100.96 | $23K | SEC | |
| Guttman-McCabe Christopher | Chief Reg & Comm Officer | F — Tax withholding / forfeiture | 1.5K | $100.96 | $153K | SEC | |
| Lang Scott A. | President and CEO | S — Open-market sale | 170 | $80.25 | $14K | SEC | |
| Marquez Elena | Chief Financial Officer | S — Open-market sale | 4.3K | $79.50 | $341K | SEC | |
| Marquez Elena | Chief Financial Officer | M — Option exercise | 1.2K | $40.00 | $49K | SEC | |
| YAZDI MAHVASH | Director | S — Open-market sale | 7.0K | $80.00 | $560K | SEC | |
| Ashe Gena L | Chief Legal Officer & Corp Sec | M — Option exercise | 18.4K | $49.39 | $907K | SEC | |
| Lang Scott A. | President and CEO | F — Tax withholding / forfeiture | 48.5K | $82.50 | $4.00M | SEC | |
| Guttman-McCabe Christopher | Chief Reg & Comm Officer | M — Option exercise | 8.0K | $32.50 | $260K | SEC | |
| Ashe Gena L | Chief Legal Officer & Corp Sec | S — Open-market sale | 13.4K | $81.04 | $1.08M | SEC | |
| Lang Scott A. | President and CEO | M — Option exercise | 63.8K | $30.99 | $1.98M | SEC | |
| Fleischhauer Mark | Director | S — Open-market sale | 3.5K | $79.83 | $279K | SEC | |
| Lang Scott A. | President and CEO | M — Option exercise | 74.5K | $34.96 | $2.61M | SEC | |
| Lang Scott A. | President and CEO | F — Tax withholding / forfeiture | 39.6K | $82.50 | $3.27M | SEC | |
| Ashe Gena L | Chief Legal Officer & Corp Sec | S — Open-market sale | 4.3K | $82.14 | $356K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Anterix Inc. (ATEX). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Guttman-McCabe Christopher | 21 | $12.38M |
| Ashe Gena L | 12 | $4.23M |
| Lang Scott A. | 9 | $11.86M |
| Marquez Elena | 7 | $429K |
| Martin Heather | 2 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ATEX insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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