AMERICAN TOWER CORP /MA/ (AMT)
$176.23+$2.07 (+1.19%) Today
Steven O. Vondran - OfficerSteven O. Vondran - OfficerSteven O. Vondran - OfficerAmerican Tower owns and operates about 150,000 wireless towers throughout the US, Asia, Latin America, Europe, and Africa. It also owns and/or operates 30 data centers in 11 US markets through its CoreSite segment. The company's customer base in the tower business is very concentrated, with most revenue in each market generated by the top three or four mobile carriers. The company operates 42,000 towers in the US, which accounted for about half of total revenue in 2025. Outside the US, American Tower operates about 47,000 towers in Latin America (dominated by Brazil), 33,000 towers in Europe, and 28,000 towers in Africa. American Tower operates as a REIT.
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market purchase | 1 | 2,829 | $501K |
| Open-market sale | 3 | 6,791 | $1.20M |
| Tax withholding / forfeiture | 1 | 153 |
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
41 Form 4 filings on record, the earliest from Oct 3, 2024, newest first. Filing history page 2 of 2.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Rodney M. Smith - Officer | Grant or award | Common Stock | 21,425 | $0.00 | - | |
| Steven O. Vondran - Officer | Grant or award | Common Stock | 24,626 | $0.00 | - | |
| Rodney M. Smith - Officer | Option exercise | Common Stock | 34,341 | $94.71 | $3.25M | |
| Rodney M. Smith - Officer | Open-market sale | Common Stock | 2,086 | $190.35 | $397K | |
| Rodney M. Smith - Officer | Open-market sale | Common Stock | 1 | $193.13 | $193 | |
| Rodney M. Smith - Officer | Open-market sale | Common Stock | 9,596 | $191.52 | $1.84M | |
| Rodney M. Smith - Officer | Open-market sale | Common Stock | 22,658 | $192.49 | $4.36M | |
| Rodney M. Smith - Officer | Option exercise | Option to Purchase Common Stock | 34,341 | $0.00 | - | |
| Eugene F. Reilly - Director | Open-market purchase | Common Stock | 5,554 | $178.99 | $994K | |
| Ruth T. Dowling - Officer | Tax withholding / forfeiture | Common Stock | 55 | $193.32 | $11K | |
| Eugene F. Reilly - Director | Other | Call Option (Obligation to Sell) | 1 | $0.00 | - | |
| Juan Font - Officer | Open-market sale | Common Stock | 720 | $208.33 | $150K | |
| Robert Joseph Meyer Jr. - Officer | Tax withholding / forfeiture | Common Stock | 162 | $214.65 | $35K | |
| Ruth T. Dowling - Officer | Tax withholding / forfeiture | Common Stock | 59 | $232.07 | $14K |
This is as far as the anonymous view goes. Create a free account for all 41 AMT filings on record.
A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| - | - | - | - | View on EDGAR | |
| - | - | - | - | View on EDGAR |
AMERICAN TOWER CORP /MA/ (AMT) had 4 insider filings in the last 90 days, with the most recent on 2026-08-25. The full record for AMT runs to 41 Form 4 filings, the earliest from 2024-10-03. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
1 insider purchase of AMT was filed in the last 90 days, totaling $501K.
3 insider sales of AMT were filed in the last 90 days, totaling $1.20M.
This page tracks AMT Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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