ATEX · Insider trading · 13F holders · Congress trades
Anterix Inc. (ATEX)
Who is buying and selling ATEX: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 18
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $14.3M
- Congress trades, 12 months
- 0
ATEX at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 8 ATEX insiders filed 10 sales worth $14.3M on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
- 18 13F filers hold ATEX among their 50 largest positions, worth $921.5M combined. The biggest bets by portfolio weight are Owl Creek Asset Management, L.P. (49.4%), Plustick Management LLC (22.7%) and Potomac Capital Management, Inc. (11.7%). In their latest 13Fs, 1 manager opened a new position and 2 added to one.
- No member of Congress has disclosed a trade in ATEX.
- ATEX last closed at $91.81 on Oct 29, 2026.
ATEX insider trading
Between Aug 1, 2026 and Oct 29, 2026, 8 ATEX insiders filed 10 sales worth $14.3M on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Oct 13, 2026 | Marquez Elena | Chief Financial Officer | Sale10b5-1 | 4,981 | $80.43 | $401K | SEC |
| Sep 22, 2026 | Lang Scott A. | President and CEO, Director | Sale | 15,000 | $80.00 | $1.2M | SEC |
| Sep 11, 2026 | Martin Heather | Chief Marketing Officer, Chief of Staff | Sale | 8,064 | $84.20 | $679K | SEC |
| Sep 11, 2026 | Daniels Leslie B | Director | Sale | 2,500 | $83.83 | $210K | SEC |
| Sep 8, 2026 | Daniels Leslie B | Director | Sale | 10,100 | $87.12 | $880K | SEC |
| Sep 8, 2026 | Ashe Gena L | Chief Legal Officer & Corp Sec | Sale | 4,357 | $85.44 | $372K | SEC |
| Aug 27, 2026 | Guttman-McCabe Christopher | Chief Reg & Comm Officer | Sale | 23,439 | $92.36 | $2.2M | SEC |
| Aug 26, 2026 | Kuhn Thomas R. | Director, Executive Chairman | Sale | 11,654 | $87.53 | $1.0M | SEC |
| Aug 18, 2026 | Heard William | Director | Sale | 46,400 | $90.11 | $4.2M | SEC |
| Aug 17, 2026 | Lang Scott A. | President and CEO, Director | Sale | 35,057 | $90.22 | $3.2M | SEC |
Who owns ATEX? Hedge funds and superinvestors
18 13F filers hold ATEX among their 50 largest positions, worth $921.5M combined. The biggest bets by portfolio weight are Owl Creek Asset Management, L.P. (49.4%), Plustick Management LLC (22.7%) and Potomac Capital Management, Inc. (11.7%). In their latest 13Fs, 1 manager opened a new position and 2 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Owl Creek Asset Management, L.P.Hedge fund | 49.4% | $557.1M | 5,411,776 | +0.0% shares | Q2 2026 |
| Heard Capital LLCHedge fund | 7.6% | $176.7M | 1,716,738 | +0.0% shares | Q2 2026 |
| Plustick Management LLCHedge fund | 22.7% | $53.5M | 520,000 | +4.1% shares | Q2 2026 |
| QVT Financial LPHedge fund | 2.6% | $39.5M | 383,941 | -23.8% shares | Q2 2026 |
| Garnet Equity Capital Holdings, Inc.Hedge fund | 7.2% | $16.1M | 156,119 | -54.5% shares | Q2 2026 |
| Potomac Capital Management, Inc.Hedge fund | 11.7% | $16.0M | 155,071 | -10.8% shares | Q2 2026 |
| Panoramic Capital, LLCHedge fund | 6.8% | $15.9M | 154,377 | +14.4% shares | Q2 2026 |
| Kirr Marbach & Co LLC /in/Investment manager | 1.7% | $9.1M | 116,554 | +0.4% shares | Q3 2026 |
| Beartown Capital Management, LLCHedge fund | 3.4% | $7.7M | 75,000 | -25.0% shares | Q2 2026 |
| Marble Bar Asset Management LLPHedge fund | 4.9% | $7.0M | 68,248 | +27.5% shares | Q2 2026 |
| 683 Capital Management, LLCHedge fund | 0.7% | $6.8M | 66,000 | — | Q2 2026 |
| Potrero Capital Research LLCHedge fund | 2.9% | $4.8M | 46,525 | -79.7% shares | Q2 2026 |
| Teton Advisors, LLCMutual fund manager | 2.6% | $4.4M | 43,000 | -18.9% shares | Q2 2026 |
| EVR Research LPHedge fund | 1.3% | $2.6M | 25,000 | New | Q2 2026 |
| Hanseatic Management Services IncWealth manager | 1.2% | $1.5M | 18,812 | +2.1% shares | Q3 2026 |
| Jefferson Bridge Capital, LLCInstitutional asset manager | 1.2% | $1.3M | 12,950 | +0.0% shares | Q2 2026 |
| Gem Investment Advisors, LLCHedge fund | 0.5% | $739K | 7,183 | +0.0% shares | Q2 2026 |
| Covestor LtdWealth manager | 0.4% | $683K | 6,637 | — | Q2 2026 |
Each manager counts with its latest 13F (Q3 2026: 2, Q2 2026: 16). Screen ATEX in the grand portfolio →
ATEX stock trades by members of Congress
No member of Congress has disclosed a trade in ATEX.
ATEX questions and answers
Are insiders buying ATEX stock?
Between Aug 1, 2026 and Oct 29, 2026, 8 ATEX insiders filed 10 sales worth $14.3M on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own ATEX?
18 13F filers hold ATEX among their 50 largest positions, worth $921.5M combined. The biggest bets by portfolio weight are Owl Creek Asset Management, L.P. (49.4%), Plustick Management LLC (22.7%) and Potomac Capital Management, Inc. (11.7%). In their latest 13Fs, 1 manager opened a new position and 2 added to one.
Has Congress traded ATEX?
No member of Congress has disclosed a trade in ATEX.
Who is the largest holder of ATEX?
Among 13F filers, Owl Creek Asset Management, L.P. reports the largest ATEX position, $557.1M (5,411,776 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Owl Creek Asset Management, L.P.'s: 49.4% of its portfolio.
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