American Tower CorporationSEC Filings
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All SEC filings by American Tower Corporation (AMT) — annual and quarterly reports, current reports, registrations, proxies and ownership forms, updated in real time.
Financials
| 10-Q | Quarterly report | View Diff | Jul 28, 2026 | |
| 10-Q | Quarterly report | View Diff | Apr 28, 2026 | |
| ARS | Annual report to shareholders | Apr 8, 2026 | ||
| 10-K | Annual report | View Diff | Feb 24, 2026 | |
| 10-Q | Quarterly report | View Diff | Oct 28, 2025 | |
| 10-Q | Quarterly report | View Diff | Jul 29, 2025 | |
| 10-Q | Quarterly report | View Diff | Apr 29, 2025 | |
| ARS | Annual report to shareholders | Apr 2, 2025 | ||
| 10-K | Annual report | View Diff | Feb 25, 2025 | |
| 10-Q | Quarterly report | View Diff | Oct 29, 2024 |
Events
| 8-K | Senior Vice President, Investor Relations | Jul 28, 2026 | ||
| 8-K | Current report | Jun 4, 2026 | ||
| 8-K | Current report | Jun 2, 2026 | ||
| 8-K | Entry Into a Material Definitive Agreement | May 27, 2026 | ||
| 8-K | American Tower Corporation Declares Quarterly Distribution | May 21, 2026 | ||
| 8-K | American Tower Corporation Prices Senior Notes Offering | May 19, 2026 | ||
| 8-K | Entry Into a Material Definitive Agreement | May 7, 2026 | ||
| 8-K | American Tower Corporation Reports First Quarter 2026 Financial Results | Apr 28, 2026 | ||
| 8-K | Departure of Directors or Certain Officers | Mar 10, 2026 | ||
| 8-K | American Tower Corporation Declares Quarterly Distribution | Mar 5, 2026 |
Registrations and Prospectuses
| 8-A12B | Registration of securities on exchange | May 27, 2026 | ||
| S-8 | Registration of securities for employees | May 26, 2026 | ||
| 25-NSE | Exchange delisting | May 22, 2026 | ||
| 424B2 | Prospectus for primary offering | May 20, 2026 | ||
| FWP | Free writing prospectus | May 19, 2026 | ||
| FWP | Free writing prospectus | May 19, 2026 | ||
| 424B5 | Prospectus supplement for primary offering | May 19, 2026 | ||
| 424B2 | Prospectus for primary offering | Dec 3, 2025 | ||
| FWP | Free writing prospectus | Dec 2, 2025 | ||
| 424B5 | Prospectus supplement for primary offering | Dec 2, 2025 |
Proxies
| DEFA14A | Additional proxy soliciting materials | Apr 28, 2026 | ||
| DEFA14A | Additional proxy soliciting materials | Apr 8, 2026 | ||
| DEF 14A | Definitive proxy | View Diff | Apr 8, 2026 | |
| DEFA14A | Additional proxy soliciting materials | Apr 2, 2025 | ||
| DEF 14A | Definitive proxy | View Diff | Apr 2, 2025 | |
| PX14A6G | Letter to shareholders | Apr 17, 2024 | ||
| DEFA14A | Additional proxy soliciting materials | Apr 10, 2024 | ||
| DEF 14A | Definitive proxy | View Diff | Apr 10, 2024 | |
| DEFA14A | Additional proxy soliciting materials | Apr 12, 2023 | ||
| DEF 14A | Definitive proxy | View Diff | Apr 12, 2023 |
Other
| CERT | Certification of approval for exchange listing | Jun 8, 2026 | ||
| CERT | Certification of approval for exchange listing | Jun 2, 2025 | ||
| CERT | Certification of approval for exchange listing | Jun 3, 2024 | ||
| CERT | Certification of approval for exchange listing | May 23, 2023 | ||
| UPLOAD | Letter from SEC | Apr 7, 2023 | ||
| CORRESP | Correspondence with SEC | Mar 31, 2023 | ||
| CORRESP | Correspondence with SEC | Mar 28, 2023 | ||
| UPLOAD | Letter from SEC | Mar 7, 2023 | ||
| CERT | Certification of approval for exchange listing | Oct 12, 2021 | ||
| CERT | Certification of approval for exchange listing | May 27, 2021 |
Ownership
| 4 | Kalathur Rajesh | Aug 25, 2026 | ||
| 4 | Meyer Robert Joseph | Jul 31, 2026 | ||
| 4 | Dowling Ruth T | Jul 30, 2026 | ||
| 144 | Notice of proposed sale of securities | Jul 29, 2026 | ||
| 144 | Notice of proposed sale of securities | Jul 28, 2026 | ||
| 4 | Meyer Robert Joseph | Jun 3, 2026 | ||
| 4 | Reeve Pamela D A | Jun 1, 2026 | ||
| 4 | Robert D Hormats | May 20, 2026 | ||
| 4 | Ruth T Dowling | Apr 30, 2026 | ||
| 3 | Paul Blanchett | Apr 30, 2026 |