Updated Jul 16, 2026 · Last SEC filing 2026-06-03
AMERICAN TOWER CORP /MA/ (AMT) has filed 3 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-03. 7 Form 8-K material event filings were reported by AMT in the last 90 days. InsiderAlpha tracks every AMT SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Real Estate Investment Trusts (SIC 6798) |
|---|---|
| SEC CIK | 0001053507 |
| Form 4 filings (90d) | 3 |
|---|---|
| Form 8-K filings (90d) | 7 |
| Latest Form 4 filing | 2026-06-03 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Meyer Robert Joseph JR | SVP & Advisor to the CFO | F — Tax withholding / forfeiture | 153 | $187.53 | $29K | SEC | |
| REEVE PAMELA D A | Director | G — Bona-fide gift | 810 | $0.00 | — | SEC | |
| Vondran Steven O | President and CEO | F — Tax withholding / forfeiture | 2.2K | $182.85 | $395K | SEC | |
| Noel Eugene M | EVP & Chief Operating Officer | F — Tax withholding / forfeiture | 719 | $182.85 | $131K | SEC | |
| Rossi Richard C | EVP & President, U.S. Tower | F — Tax withholding / forfeiture | 684 | $182.85 | $125K | SEC | |
| Smith Rodney M | EVP, CFO & Treasurer | F — Tax withholding / forfeiture | 1.3K | $182.85 | $237K | SEC | |
| Meyer Robert Joseph JR | SVP & Chief Accounting Officer | F — Tax withholding / forfeiture | 684 | $182.85 | $125K | SEC | |
| Font Juan | SVP, Pres. & CEO, CoreSite | F — Tax withholding / forfeiture | 928 | $182.85 | $170K | SEC | |
| Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | F — Tax withholding / forfeiture | 863 | $182.85 | $158K | SEC | |
| Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | A — Grant or award | 6.9K | $0.00 | — | SEC | |
| Font Juan | SVP, Pres. & CEO, CoreSite | A — Grant or award | 8.1K | $0.00 | — | SEC | |
| Rossi Richard C | EVP & President, U.S. Tower | F — Tax withholding / forfeiture | 1.5K | $186.12 | $287K | SEC | |
| Smith Rodney M | EVP, CFO & Treasurer | F — Tax withholding / forfeiture | 12.4K | $186.12 | $2.31M | SEC | |
| Dowling Ruth T | EVP, Chief Admin Ofr, GC & Sec | F — Tax withholding / forfeiture | 6.6K | $186.12 | $1.23M | SEC | |
| Meyer Robert Joseph JR | SVP & Chief Accounting Officer | A — Grant or award | 4.0K | $0.00 | — | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for AMERICAN TOWER CORP /MA/ (AMT). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Meyer Robert Joseph JR | 1 | $29K |
| HORMATS ROBERT D | 1 | — |
| REEVE PAMELA D A | 1 | — |
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in AMT insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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