🕵️ Anterix Inc. ($ATEX)
SEC insider & ownership activity, last 12 months · CIK 1304492 · every row links its SEC filing
Over the last 12 months insiders sold $25.5M against $174K of open-market buying. Christopher Guttman-McCabe sold $12.2M (Jun–Aug). No red-flag 8-Ks in the window.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $174K (3 lots) · 10 sellers, $25.5M (35 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Christopher Guttman-McCabe | 0 | – | 11 | $12.2M | Aug 25, 2026 |
| William Heard | 0 | – | 1 | $4.2M | Aug 14, 2026 |
| Scott A. Lang | 3 | $174K | 5 | $3.2M | Aug 14, 2026 |
| Gena L. Ashe | 0 | – | 5 | $2.0M | Sep 8, 2026 |
| Leslie B. Daniels | 0 | – | 4 | $1.1M | Sep 10, 2026 |
| Thomas R. Kuhn | 0 | – | 5 | $1.0M | Aug 24, 2026 |
| Martin Heather | 0 | – | 1 | $679K | Sep 10, 2026 |
| Yazdi Mahvash | 0 | – | 1 | $560K | Jun 16, 2026 |
| Elena Marquez | 0 | – | 1 | $341K | Jun 17, 2026 |
| Fleischhauer Mark | 0 | – | 1 | $279K | Jun 15, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Jeffrey A. Altman | 28.5% | 13D | Jun 25, 2026 | filing ↗ | |
| OWL Creek Asset Management, L.P. | 27.7% | 13D | Jun 25, 2026 | filing ↗ | |
| T. ROWE Price Investment Management, Inc. | 12.0% | 13G | Jul 8, 2026 | filing ↗ | |
| Heard Investment Manager LLC | 9.4% | 13D | Feb 28, 2025 | filing ↗ | |
| William E. Heard Declaration of Trust | 9.4% | 13D | Feb 28, 2025 | filing ↗ | |
| Heard Capital LLC | 9.4% | 13D | Feb 28, 2025 | filing ↗ | |
| William Heard | 9.4% | 13D | Feb 28, 2025 | filing ↗ | |
| BlackRock, Inc. | 5.1% | 13G | Jul 27, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Heather Martin | $679K | Sep 10, 2026 | filing ↗ |
| Gena L. Ashe | $372K | Sep 8, 2026 | filing ↗ |
| Christopher Guttman-McCabe | $2.2M | Aug 25, 2026 | filing ↗ |
| Thomas Kuhn | $889K | Aug 24, 2026 | filing ↗ |
| Scott Lang | $3.2M | Aug 14, 2026 | filing ↗ |
| Elena Marquez | $341K | Jun 17, 2026 | filing ↗ |
| Yazdi Mahvash | $560K | Jun 16, 2026 | filing ↗ |
| Christopher Guttman-McCabe | $10.0M | Jun 15, 2026 | filing ↗ |
| Gena L. Ashe | $1.4M | Jun 15, 2026 | filing ↗ |
| Ryan L. Gerbrandt | $1.1M | Apr 17, 2026 | filing ↗ |
| Ryan L. Gerbrandt | $1.1M | Apr 16, 2026 | filing ↗ |
| Gena L. Ashe | $450K | Mar 3, 2026 | filing ↗ |
| Ryan L. Gerbrandt | $838K | Mar 2, 2026 | filing ↗ |
| Ryan L. Gerbrandt | $976K | Feb 19, 2026 | filing ↗ |
| Gena Ashe | $139K | Nov 18, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Aug 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 11, 2026 | filing ↗ |
| Officer/director changes (5.02) | Aug 4, 2026 | filing ↗ |
| Shareholder vote (5.07) | Aug 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 4, 2026 | filing ↗ |
| Earnings (2.02) | Jun 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 10, 2026 | filing ↗ |
| Other events (8.01) | Apr 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 21, 2026 | filing ↗ |
| Other events (8.01) | Apr 21, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 21, 2026 | filing ↗ |
| Other events (8.01) | Mar 31, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 31, 2026 | filing ↗ |
| Other events (8.01) | Mar 25, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 25, 2026 | filing ↗ |
| Earnings (2.02) | Feb 11, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 11, 2026 | filing ↗ |
| Other events (8.01) | Jan 30, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 30, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 7, 2026 | filing ↗ |
| Earnings (2.02) | Nov 12, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 12, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 12, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 9, 2025 | filing ↗ |
| Officer/director changes (5.02) | Sep 18, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 18, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 18, 2025 | filing ↗ |