SEC Form 4
American Tower Corporation (AMT) insider trading
In the 12 months to Oct 23, 2026, 5 AMT insiders reported open-market sales of $23.2M across 9 filings; 3 insiders bought $2.1M.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $23.2M
- 9 filings · 5 insiders
- Open-market purchases
- $2.1M
- 4 filings
- Pre-arranged sales (10b5-1)
- 7 of 9
- $21.5M of $23.2M sold (93%)
Who traded AMT, and when
- Purchase
- Sale
- Sale, pre-arranged (10b5-1)
AMT daily close from Oct 23, 2025 to Oct 23, 2026, between $161.06 and $194.12, last $188.51. 9 sale and 4 purchase filings by 8 insiders, marked at their filing dates. Eugene M. Noel, EVP & Chief Operating Officer: sold $7.9M across 1 filing, first filed Mar 4, 2026, last Mar 4, 2026. Rodney M. Smith, EVP, CFO & Treasurer: sold $6.6M across 1 filing, first filed Feb 19, 2026, last Feb 19, 2026. Steven O. Vondran, President and CEO: sold $6.3M across 1 filing, first filed Mar 6, 2026, last Mar 6, 2026. Robert Joseph Meyer, SVP & Chief Accounting Officer → SVP & Advisor to the CFO: sold $1.7M across 2 filings, first filed Mar 3, 2026, last Jul 31, 2026. Rajesh Kalathur, Director: bought $995.7K across 2 filings, first filed Mar 12, 2026, last Aug 25, 2026. Eugene F. Reilly, Director: bought $994.1K across 1 filing, first filed Nov 4, 2025, last Nov 4, 2025. Ruth T. Dowling, EVP, Chief Admin Ofr, GC & Sec: sold $733.4K across 4 filings, first filed Mar 3, 2026, last Jul 30, 2026. Teresa Hillary Clarke, Director: bought $63.7K across 1 filing, first filed Oct 22, 2026, last Oct 22, 2026.
Largest mark · tap a row for others
Eugene M. Noel · EVP & Chief Operating Officer
Sale $7,872,920
41,209 shares at $191.05 avg
Filed Mar 4, 2026 · traded Mar 2
Pre-arranged (10b5-1) · close on filing date $190.80
Eugene M. Noel · EVP & Chief Operating Officer
EVP & Chief Operating Officer
$7.9M soldRodney M. Smith · EVP, CFO & Treasurer
EVP, CFO & Treasurer
$6.6M soldSteven O. Vondran · President and CEO
President and CEO
$6.3M soldRobert Joseph Meyer · SVP & Chief Accounting Officer → SVP & Advisor to the CFO
SVP & Chief Accounting Officer → SVP & Advisor to the CFO
$1.7M soldRajesh Kalathur · Director
Director
$995.7K boughtEugene F. Reilly · Director
Director
$994.1K boughtRuth T. Dowling · EVP, Chief Admin Ofr, GC & Sec
EVP, Chief Admin Ofr, GC & Sec
$733.4K soldTeresa Hillary Clarke · Director
Director
$63.7K boughtHas the American Tower Corporation's CEO sold stock?
Yes. Steven O. Vondran (CEO) sold 33,482 shares ($6.3M) in Mar 2026, all under a pre-arranged 10b5-1 plan. Juan Font (CEO) made no open-market sales filed as CEO in the last 12 months.
Open-market trades
13 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Eugene M. Noel | EVP & Chief Operating Officer | $7.9M | — | 1 | 100% of sales | |
| Rodney M. Smith | EVP, CFO & Treasurer | $6.6M | — | 1 | 100% of sales | |
| Steven O. Vondran | President and CEO | $6.3M | — | 1 | 100% of sales | |
| Robert Joseph Meyer | SVP & Chief Accounting Officer → SVP & Advisor to the CFO | $1.7M | — | 2 | — | |
| Rajesh Kalathur | Director | — | $995.7K | 2 | — | |
| Eugene F. Reilly | Director | — | $994.1K | 1 | — | |
| Ruth T. Dowling | EVP, Chief Admin Ofr, GC & Sec | $733.4K | — | 4 | 100% of sales | |
| Teresa Hillary Clarke | Director | — | $63.7K | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Teresa Hillary Clarke Director | Purchase | 338 | $188.38 | $63.7K | 5,645 | |
traded | Rajesh Kalathur Director | Purchase | 2,829 | $177.00 | $500.7K | 7,765 | |
traded | Robert Joseph Meyer SVP & Advisor to the CFO | Sale | 5,000 | $178.89 | $894.4K | 21,428 | |
traded | Ruth T. Dowling EVP, Chief Admin Ofr, GC & Sec | SalePre-arranged (10b5-1) | 1,791 | $172.89 | $309.6K | 27,711 | |
traded | Ruth T. Dowling EVP, Chief Admin Ofr, GC & Sec | SalePre-arranged (10b5-1) | 972 | $178.08 | $173.1K | 29,461 | |
traded | Rajesh Kalathur Director | Purchase | 2,671 | $185.30 | $494.9K | 4,936 | |
traded | Ruth T. Dowling EVP, Chief Admin Ofr, GC & Sec | SalePre-arranged (10b5-1) | 682 | $188.51 | $128.6K | 31,047 | |
traded | Steven O. Vondran President and CEO | SalePre-arranged (10b5-1) | 33,482 | $188.46 | $6.3M | 105,374 | |
traded | Eugene M. Noel EVP & Chief Operating Officer | SalePre-arranged (10b5-1) | 41,209 | $191.05 | $7.9M | 29,592 | |
traded | Robert Joseph Meyer SVP & Chief Accounting Officer | Sale | 4,454 | $186.73 | $831.7K | 24,461 | |
traded | Ruth T. Dowling EVP, Chief Admin Ofr, GC & Sec | SalePre-arranged (10b5-1) | 656 | $186.16 | $122.1K | 31,729 | |
traded | Rodney M. Smith EVP, CFO & Treasurer | SalePre-arranged (10b5-1) | 34,341 | $192.09 | $6.6M | 106,569 | |
traded | Eugene F. Reilly Director | Purchase | 5,554 | $178.99 | $994.1K | 5,689 |
GET /stocks/filings/vX/form-4?tickers=AMT&filing_date.gte=2025-10-23&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"AMT"
],
"issuer_cik": "0001053507",
"owner_cik": "0001875332",
"accession_number": "0001053507-26-000151",
"form_type": "4",
"filing_date": "2026-10-22",
"period_of_report": "2023-04-28",
"issuer_name": "AMERICAN TOWER CORP /MA/",
"issuer_trading_symbol": "AMT",
"owner_name": "Clarke Teresa Hillary",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2024-10-25",
"transaction_code": "P",
"equity_swap_involved": false,
"transaction_shares": 14.371,
"transaction_price_per_share": 227.42,
"transaction_acquired_disposed": "A",
"shares_owned_following_transaction": 5385.83,
"transaction_value": 3268.2528199999997,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "Reflects shares acquired pursuant to a dividend reinvestment plan administered by the reporting person's broker, and inadvertently not previously reported."
}
],
"remarks": "As of the date of this filing, the reporting person is no longer enrolled a dividend reinvestment plan administered by the reporting person's broker."
},
{
"tickers": [
"AMT"
],
"issuer_cik": "0001053507",
"owner_cik": "0001875332",
"accession_number": "0001053507-26-000151",
"form_type": "4",
"filing_date": "2026-10-22",
"period_of_report": "2023-04-28",
"issuer_name": "AMERICAN TOWER CORP /MA/",
"issuer_trading_symbol": "AMT",
"owner_name": "Clarke Teresa Hillary",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2023-10-27",
"transaction_code": "P",
"equity_swap_involved": false,
"transaction_shares": 8.452,
"transaction_price_per_share": 171.52,
"transaction_acquired_disposed": "A",
"shares_owned_following_transaction": 5329.318,
"transaction_value": 1449.68704,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "Reflects shares acquired pursuant to a dividend reinvestment plan administered by the reporting person's broker, and inadvertently not previously reported."
}
],
"remarks": "As of the date of this filing, the reporting person is no longer enrolled a dividend reinvestment plan administered by the reporting person's broker."
}
]
}
// 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) · 42 records
- Option exercises3 records
- Tax withholding16 records
- Grants and awards22 records
- Gifts1 record
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
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 AMT 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.
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.
- Role
- The title on each filing. Someone whose title changed shows more than one.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.