🕵️ 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 $10.3M against $175K of open-market buying. Christopher Guttman-McCabe sold $7.5M (Jun). 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
2 buyers, $175K (4 lots) · 6 sellers, $10.3M (11 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Christopher Guttman-McCabe | 0 | – | 4 | $7.5M | Jun 15, 2026 |
| Gena L Ashe | 0 | – | 3 | $1.6M | Jun 15, 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 |
| Scott A. Lang | 3 | $174K | 1 | $14K | Jun 18, 2026 |
| Gray Timothy | 1 | $1K | 0 | – | Aug 19, 2025 |
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 | |
|---|---|---|---|
| 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) | 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 ↗ |
| Earnings (2.02) | Aug 12, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 12, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 12, 2025 | filing ↗ |
| Shareholder vote (5.07) | Aug 5, 2025 | filing ↗ |