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
ARS Annual report to shareholders Apr 8, 2026 Dec 31, 2025
10-K Annual report Feb 24, 2026 Dec 31, 2025
ARS Annual report to shareholders Apr 2, 2025 Dec 31, 2024
10-K Annual report Feb 25, 2025 Dec 31, 2024
ARS Annual report to shareholders Apr 10, 2024 Dec 31, 2023
10-K Annual report Feb 27, 2024 Dec 31, 2023
ARS Annual report to shareholders Apr 12, 2023 Dec 31, 2022
10-K Annual report Feb 23, 2023 Dec 31, 2022
10-K Annual report Feb 25, 2022 Dec 31, 2021
10-K Annual report Feb 25, 2021 Dec 31, 2020
10-K Annual report Feb 25, 2020 Dec 31, 2019
10-K Annual report Feb 27, 2019 Dec 31, 2018
10-K Annual report Feb 28, 2018 Dec 31, 2017

Showing 13 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.

New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.

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.