Anterix Inc. (ATEX) Insider Trading
Over the last 3 months, ATEX insiders made 0 open-market buys and 31 sales, a net sale of -$30.7M (SEC Form 4). Over the last 6 months, 90 institutions increased and 77 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
31
Net (3m)
-$30.7M
Insider trades by month Buys Sells
Aug
Sep
Nov
Dec
Jun
Aug
Context3-month price +38.2%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 27, 2026 | Guttman-McCabe Christopherofficer: Chief Reg & Comm Officer | Tax | 16,561 | $90.38 |
| Aug 27, 2026 | Guttman-McCabe Christopherofficer: Chief Reg & Comm Officer | Sell | 7,580 | $91.69 |
| Aug 27, 2026 | Guttman-McCabe Christopherofficer: Chief Reg & Comm Officer | Sell | 7,791 | $92.77 |
| Aug 27, 2026 | Guttman-McCabe Christopherofficer: Chief Reg & Comm Officer | Sell | 2,696 | $90.61 |
| Aug 27, 2026 | Guttman-McCabe Christopherofficer: Chief Reg & Comm Officer | Option | 40,000 | $34.72 |
| Aug 27, 2026 | Guttman-McCabe Christopherofficer: Chief Reg & Comm Officer | Sell | 5,372 | $93.59 |
| Aug 26, 2026 | Kuhn Thomas R.director, other: Executive Chairman | Sell | 1,654 | $79.52 |
| Aug 26, 2026 | Kuhn Thomas R.director, other: Executive Chairman | Option | 10,000 | $33.62 |
| Aug 26, 2026 | Kuhn Thomas R.director, other: Executive Chairman | Sell | 4,392 | $88.18 |
| Aug 26, 2026 | Kuhn Thomas R.director, other: Executive Chairman | Sell | 4,418 | $89.12 |
| Aug 26, 2026 | Kuhn Thomas R.director, other: Executive Chairman | Grant | 2,791 | — |
| Aug 26, 2026 | Kuhn Thomas R.director, other: Executive Chairman | Sell | 400 | $91.01 |
| Aug 26, 2026 | Kuhn Thomas R.director, other: Executive Chairman | Sell | 790 | $90.00 |
| Aug 18, 2026 | Heard Williamdirector | Sell | 46,400 | $90.11 |
| Aug 17, 2026 | Lang Scott A.director, officer: President and CEO | Sell | 5,373 | $88.96 |
| Aug 17, 2026 | Lang Scott A.director, officer: President and CEO | Sell | 10,087 | $90.87 |
| Aug 17, 2026 | Lang Scott A.director, officer: President and CEO | Sell | 800 | $91.69 |
| Aug 17, 2026 | Lang Scott A.director, officer: President and CEO | Sell | 18,797 | $90.16 |
| Aug 14, 2026 | Guttman-McCabe Christopherofficer: Chief Reg & Comm Officer | Sell | 11,668 | $78.73 |
| Aug 14, 2026 | Guttman-McCabe Christopherofficer: Chief Reg & Comm Officer | Sell | 34,870 | $81.51 |
| Aug 14, 2026 | Guttman-McCabe Christopherofficer: Chief Reg & Comm Officer | Sell | 21,050 | $83.86 |
| Aug 14, 2026 | Guttman-McCabe Christopherofficer: Chief Reg & Comm Officer | Sell | 5,030 | $79.53 |
| Aug 14, 2026 | Guttman-McCabe Christopherofficer: Chief Reg & Comm Officer | Sell | 21,434 | $80.63 |
| Aug 14, 2026 | Guttman-McCabe Christopherofficer: Chief Reg & Comm Officer | Sell | 7,755 | $84.40 |
| Aug 14, 2026 | Guttman-McCabe Christopherofficer: Chief Reg & Comm Officer | Sell | 21,045 | $82.39 |
| Aug 6, 2026 | Fleischhauer Markdirector | Grant | 1,598 | — |
| Aug 6, 2026 | YAZDI MAHVASHdirector | Grant | 1,598 | — |
| Aug 6, 2026 | Heard Williamdirector | Grant | 1,598 | — |
| Aug 6, 2026 | ALTMAN JEFFREY Adirector, 10 percent owner: | Grant | 1,598 | — |
| Aug 6, 2026 | DANIELS LESLIE Bdirector | Grant | 1,598 | — |
Source: ATEX SEC Form 4 filings, latest Aug 27, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their ATEX positions over the last 6 months (SEC Form 13F).
Increased
90
New positions
100
Reduced
77
Sold out
17
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| OWL CREEK ASSET MANAGEMENT, L.P. | Unchanged | 5.4M | May 15, 2026 |
| Owl Creek Asset Management, L.P. | Unchanged | 5.4M | Aug 14, 2026 |
| T. Rowe Price Investment Management, Inc. | New Position | 2.3M | Aug 14, 2026 |
| HEARD CAPITAL LLC | Unchanged | 1.7M | May 15, 2026 |
| Heard Capital LLC | Unchanged | 1.7M | Aug 11, 2026 |
| BlackRock, Inc. | Increased | 1.1M | Aug 7, 2026 |
| BLACKROCK, INC. | Reduced | 1.0M | May 13, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 750K | Aug 14, 2026 |
| Jupiter Topco LLC | New Position | 662K | Aug 14, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 574K | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 553K | Aug 13, 2026 |
| PLUSTICK MANAGEMENT LLC | Increased | 520K | Aug 14, 2026 |
| QVT FINANCIAL LP | Unchanged | 504K | May 15, 2026 |
| PLUSTICK MANAGEMENT LLC | New Position | 500K | May 15, 2026 |
| STATE STREET CORP | Increased | 496K | Aug 7, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.