SEC Form 4
Anterix Inc. (ATEX) insider trading
In the 12 months to Oct 26, 2026, 10 ATEX insiders reported open-market sales of $27.0M across 17 filings; one president and CEO bought $75.1K.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $27.0M
- 17 filings · 10 insiders
- Open-market purchases
- $75.1K
- 2 filings · Scott A. Lang, President and CEO
- Pre-arranged sales (10b5-1)
- 2 of 17
- $1.6M of $27.0M sold (6%)
Who traded ATEX, and when
- Purchase
- Sale
- Sale, pre-arranged (10b5-1)
ATEX daily close from Oct 27, 2025 to Oct 26, 2026, between $17.99 and $108.21, last $81.10. 17 sale and 2 purchase filings by 10 insiders, marked at their filing dates. Christopher Guttman-McCabe, Chief Reg & Comm Officer: sold $12.2M across 2 filings, first filed Aug 14, 2026, last Aug 27, 2026. Scott A. Lang, President and CEO: sold $4.4M and bought $75.1K across 5 filings, first filed Dec 10, 2025, last Sep 23, 2026. William Heard, Director: sold $4.2M across 1 filing, first filed Aug 18, 2026, last Aug 18, 2026. Gena L. Ashe, Chief Legal Officer & Corp Sec: sold $2.0M across 3 filings, first filed Nov 19, 2025, last Sep 11, 2026. Leslie B. Daniels, Director: sold $1.1M across 2 filings, first filed Sep 8, 2026, last Sep 11, 2026. Thomas R. Kuhn, Director: sold $888.5K across 1 filing, first filed Aug 26, 2026, last Aug 26, 2026. 4 others: sold $2.3M across 5 filings, first filed Jun 17, 2026, last Oct 13, 2026.
Largest mark · tap a row for others
Christopher Guttman-McCabe · Chief Reg & Comm Officer
Sale $10,042,744
122,852 shares at $81.75 avg
Filed Aug 14, 2026 · traded Jun 15
Close on filing date $91.53
Christopher Guttman-McCabe · Chief Reg & Comm Officer
Chief Reg & Comm Officer
$12.2M soldScott A. Lang · President and CEO
President and CEO
$4.4M sold$75.1K boughtWilliam Heard · Director
Director
$4.2M soldGena L. Ashe · Chief Legal Officer & Corp Sec
Chief Legal Officer & Corp Sec
$2.0M soldLeslie B. Daniels · Director
Director
$1.1M soldThomas R. Kuhn · Director
Director
$888.5K sold4 others
Combined, one mark per week
$2.3M soldOpen-market trades
19 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Christopher Guttman-McCabe | Chief Reg & Comm Officer | $12.2M | — | 2 | — | |
| Scott A. Lang | President and CEO | $4.4M | $75.1K | 5 | 27% of sales | |
| William Heard | Director | $4.2M | — | 1 | — | |
| Gena L. Ashe | Chief Legal Officer & Corp Sec | $2.0M | — | 3 | — | |
| Leslie B. Daniels | Director | $1.1M | — | 2 | — | |
| Thomas R. Kuhn | Director | $888.5K | — | 1 | — | |
| Elena Marquez | Chief Financial Officer | $741.7K | — | 2 | 54% of sales | |
| Heather Martin | Chief Marketing Officer | $679.0K | — | 1 | — | |
| Mahvash Yazdi | Director | $560.0K | — | 1 | — | |
| Mark Fleischhauer | Director | $279.4K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Elena Marquez Chief Financial Officer | SalePre-arranged (10b5-1) | 4,981 | $80.43 | $400.6K | 12,814 | |
traded | Scott A. Lang President and CEO | SalePre-arranged (10b5-1) | 15,000 | $80.00 | $1.2M | 26,470 | |
traded | Leslie B. Daniels Director | Sale | 2,500 | $83.83 | $209.6K | 43,477 | |
traded | Gena L. Ashe Chief Legal Officer & Corp Sec | Sale | 4,357 | $85.44 | $372.3K | 9,238 | |
traded | Heather Martin Chief Marketing Officer | Sale | 8,064 | $84.20 | $679.0K | 26,743 | |
traded | Leslie B. Daniels Director | Sale | 10,100 | $87.12 | $879.9K | 45,977 | |
traded | Christopher Guttman-McCabe Chief Reg & Comm Officer | Sale | 23,439 | $92.36 | $2.2M | 62,943 | |
traded | Thomas R. Kuhn Director | Sale | 10,000 | $88.85 | $888.5K | 18,921 | |
traded | William Heard Director | Sale | 46,400 | $90.11 | $4.2M | 1,670,338 | |
traded | Scott A. Lang President and CEO | Sale | 35,057 | $90.22 | $3.2M | 46,843 | |
traded | Christopher Guttman-McCabe Chief Reg & Comm Officer | Sale | 122,852 | $81.75 | $10.0M | 75,197 | |
traded | Scott A. Lang President and CEO | Sale | 170 | $80.25 | $13.6K | 76,527 | |
traded | Elena Marquez Chief Financial Officer | Sale | 4,291 | $79.50 | $341.1K | 18,387 | |
traded | Mahvash Yazdi Director | Sale | 7,000 | $80.00 | $560.0K | 19,407 | |
traded | Gena L. Ashe Chief Legal Officer & Corp Sec | Sale | 17,711 | $81.31 | $1.4M | 13,867 | |
traded | Mark Fleischhauer Director | Sale | 3,500 | $79.83 | $279.4K | 12,769 | |
traded | Scott A. Lang President and CEO | Purchase | 1,160 | $21.61 | $25.1K | 8,260 | |
traded | Scott A. Lang President and CEO | Purchase | 2,450 | $20.41 | $50.0K | 7,100 | |
traded | Gena L. Ashe Chief Legal Officer & Corp Sec | Sale | 6,564 | $21.07 | $138.3K | 13,366 |
GET /stocks/filings/vX/form-4?tickers=ATEX&filing_date.gte=2025-10-26&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"ATEX"
],
"issuer_cik": "0001304492",
"owner_cik": "0002090789",
"accession_number": "0002090789-26-000016",
"form_type": "4",
"filing_date": "2026-10-13",
"period_of_report": "2026-10-09",
"issuer_name": "Anterix Inc.",
"issuer_trading_symbol": "ATEX",
"owner_name": "Marquez Elena",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Chief Financial Officer",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-10-09",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 400,
"transaction_price_per_share": 81.8,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 12704,
"transaction_value": 32720,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 22, 2026."
},
{
"id": "F3",
"description": "The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.45 to $82.00, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the ranges set forth in this footnote to this Form 4."
}
]
},
{
"tickers": [
"ATEX"
],
"issuer_cik": "0001304492",
"owner_cik": "0002090789",
"accession_number": "0002090789-26-000016",
"form_type": "4",
"filing_date": "2026-10-13",
"period_of_report": "2026-10-09",
"issuer_name": "Anterix Inc.",
"issuer_trading_symbol": "ATEX",
"owner_name": "Marquez Elena",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Chief Financial Officer",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-10-09",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 100,
"transaction_price_per_share": 82.5,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 12604,
"transaction_value": 8250,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The sale of shares was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 22, 2026."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 48 records
- Option exercises16 records
- Tax withholding17 records
- Tax withholding (sold to cover)1 record
- Grants and awards12 records
- Gifts2 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.
- Counted once
- When several owners (a fund and its partners, say) report the same trade, it's counted once. Corrected filings replace the originals.
Frequently asked questions
Has Anterix Inc.'s CEO sold stock?
Yes. Scott A. Lang (CEO) sold 50,227 shares ($4.4M) between Jun 2026 and Sep 2026, $1.2M of it under a pre-arranged 10b5-1 plan.
How current is ATEX’s insider data?
These are ATEX Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.
What counts as an open-market buy or sell?
Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.
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Track ATEX insider trades with your agent
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for ATEX every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
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