ATEX insider buying and SEC filings, explained
Anterix Inc. · CIK 1304492
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$75K
Insiders who bought
1
Sold (not marked 10b5-1)
$20.6M
Planned sales (10b5-1)
$1.6M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Oct 9, 2026 | Planned (10b5-1) | Elena Marquez (CFO) sold 4,981 shares at about $80.43 ($401K), marked as a 10b5-1 plan trade. Holdings down 28% to 12,604 shares. | SEC filing Filed Oct 13, 2026, 7:57 AM ET |
| Sep 21, 2026 | Planned (10b5-1) Amended filing | Scott A. Lang (CEO and Director) sold 15,000 shares at $80.00 ($1.2M), marked as a 10b5-1 plan trade. Holdings down 36% to 26,470 shares. This amends a filing from Sep 22. | SEC filing Filed Sep 23, 2026 |
| Sep 10, 2026 | Sale | Leslie B. Daniels (Director) sold 2,500 shares at about $83.83 ($210K). Holdings down 5% to 43,477 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 11, 2026 |
| Sep 10, 2026 | Sale | Heather Martin (Chief Marketing Officer and Chief of Staff) sold 8,064 shares at about $84.20 ($679K). Holdings down 23% to 26,743 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 11, 2026 |
| Sep 3–4, 2026 | Sale | Leslie B. Daniels (Director) sold 10,100 shares between Sep 3 and Sep 4 at about $87.12 ($880K). Holdings down 18% to 45,977 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 8, 2026 |
| Jun 18, 2026 | Sale | Thomas R. Kuhn (Director and Executive Chairman) sold 1,654 shares at $79.52 ($132K). Holdings down 9% to 17,731 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 26, 2026 |
| Aug 14, 2026 | Sale | William Heard (Director) sold 46,400 shares indirectly (by entity) at about $90.11 ($4.2M). Holdings by entity down 3% to 1,670,338 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 18, 2026 |
| Aug 14, 2026 | Sale | Scott A. Lang (CEO and Director) sold 35,057 shares at about $90.22 ($3.2M). Holdings down 46% to 41,470 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 17, 2026 |
| Jun 15, 2026 | Sale Amended filing | Christopher Guttman-McCabe (Chief Reg & Comm Officer) sold 122,852 shares at about $81.75 ($10.0M). Holdings down 73% to 46,392 shares. Not marked as a 10b5-1 plan trade. This amends a filing from Jun 17. | SEC filing Filed Aug 14, 2026 |
| Jun 18, 2026 | Sale | Scott A. Lang (CEO and Director) sold 170 shares at $80.25 ($14K). Holdings down <1% to 76,527 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 22, 2026 |
| Jun 17, 2026 | Sale | Elena Marquez (CFO) sold 4,291 shares at $79.50 ($341K). Holdings down 19% to 18,387 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 18, 2026 |
| Jun 16, 2026 | Sale | Mahvash Yazdi (Director) sold 7,000 shares at $80.00 ($560K). Holdings down 27% to 19,407 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 17, 2026 |
| Jun 15, 2026 | Sale | Mark Fleischhauer (Director) sold 3,500 shares at $79.83 ($279K). Holdings down 22% to 12,769 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 17, 2026 |
| Dec 18, 2025 | Purchase (code P) | Scott A. Lang (CEO and Director) bought 1,160 shares at $21.61 ($25K), reported as a purchase (code P). Holdings up 16% to 8,260 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 19, 2025 |
| Dec 8, 2025 | Purchase (code P) | Scott A. Lang (CEO and Director) bought 2,450 shares at $20.41 ($50K), reported as a purchase (code P). Holdings up 53% to 7,100 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 10, 2025 |
| Nov 18, 2025 | Sale | Gena L Ashe (Chief Legal Officer & Corp Sec) sold 6,564 shares at $21.07 ($138K). Holdings down 33% to 13,366 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 19, 2025 |
35 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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