American Tower Corp /MA/ SEC filings AMT
American Tower Corp /MA/ has 1,000 filings in SEC EDGAR's recent list, going back to May 31, 2017. Its latest annual report, Form ARS, was filed on Apr 8, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 27, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 27, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| CERT | Nyse certification | Jun 8, 2026 | — |
| 8-A12B | Filing | May 27, 2026 | — |
| 25-NSE | Delisting notice | May 22, 2026 | — |
| CERT | Nyse certification | Jun 2, 2025 | — |
| 8-A12B | Filing | May 30, 2025 | — |
| 25-NSE | Delisting notice | Apr 4, 2025 | — |
| CERT | Nyse certification | Jun 3, 2024 | — |
| 8-A12B | Filing | May 29, 2024 | — |
| PX14A6G | Filing | Apr 17, 2024 | — |
| CERT | Nyse certification | May 23, 2023 | — |
| 8-A12B | Filing | May 16, 2023 | — |
| UPLOAD | Letter from the SEC | Apr 7, 2023 | — |
| CORRESP | Letter to the SEC | Mar 31, 2023 | — |
| CORRESP | Letter to the SEC | Mar 28, 2023 | — |
| UPLOAD | Letter from the SEC | Mar 7, 2023 | — |
| SC TO-T/A | Filing | Dec 28, 2021 | — |
| SC TO-T/A | Filing | Dec 17, 2021 | — |
| SC TO-T/A | Filing | Dec 10, 2021 | — |
| SC TO-T/A | Filing | Dec 7, 2021 | — |
| SC TO-T/A | Filing | Dec 6, 2021 | — |
| SC TO-T/A | Filing | Dec 2, 2021 | — |
| SC TO-T | Filing | Nov 29, 2021 | — |
| SC TO-C | Filing | Nov 26, 2021 | — |
| SC TO-C | Filing | Nov 16, 2021 | — |
| SC TO-C | Filing | Nov 15, 2021 | — |
| CERT | Nyse certification | Oct 12, 2021 | — |
| 8-A12B | Filing | Oct 5, 2021 | — |
| CERT | Nyse certification | May 27, 2021 | — |
| 8-A12B | Filing | May 21, 2021 | — |
| CERT | Nyse certification filing | Sep 17, 2020 | — |
| 8-A12B | Filing | Sep 10, 2020 | — |
| CERT | Nyse certification - american tower corp | May 24, 2018 | — |
| 8-A12B | Filing | May 22, 2018 | — |
| UPLOAD | Letter from the SEC | Apr 2, 2018 | — |
| CORRESP | Letter to the SEC | Mar 30, 2018 | — |
| UPLOAD | Letter from the SEC | Mar 19, 2018 | — |
| 25-NSE | Delisting notice | Feb 15, 2018 | — |
Showing 37 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Real Estate Investment Trusts (SIC 6798)
- Listed as
- AMT (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Boston, MA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1053507
- Former names
- AMERICAN TOWER SYSTEMS CORP (until May 8, 1998)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.