Company facts
- Industry
- Real Estate Investment Trusts
- Headquarters
- Boston, Massachusetts
- Most recent report
- 10-Q, filed Oct 27, 2026
- Incorporated
- Delaware
- Filings on record
- 1,000+ filings
- On EDGAR
- CIK 1053507
- Fiscal year ends
- December
- Filer status
- Large accelerated filer
Financials 8 of 38
News 8 of 233
Prospectuses and Registrations 8 of 100
- 424B2 Prospectus supplement for an offering Sep 10, 2026
- FWP Free writing prospectus Sep 9, 2026
- 424B5 Prospectus supplement for an offering Sep 9, 2026
- S-8 Registration statement for an employee plan May 26, 2026
- 25-NSE Notice that a security was delisted May 22, 2026
- 424B2 Prospectus supplement for an offering May 20, 2026
- FWP Free writing prospectus May 19, 2026
- 424B5 Prospectus supplement for an offering May 19, 2026
Proxies 8 of 20
- DEFA14A Extra proxy material Apr 28, 2026
- DEFA14A Extra proxy material Apr 8, 2026
- DEF 14A Proxy statement for a shareholder vote Apr 8, 2026
- DEFA14A Extra proxy material Apr 2, 2025
- DEF 14A Proxy statement for a shareholder vote Apr 2, 2025
- PX14A6G Shareholder's own proxy material Apr 17, 2024
- DEFA14A Extra proxy material Apr 10, 2024
- DEF 14A Proxy statement for a shareholder vote Apr 10, 2024
Ownership 8 of 571
- 4 Insider reported a trade Nov 3, 2026
- 4 Insider reported a trade Oct 30, 2026
- 144 Notice of a proposed sale of restricted stock Oct 30, 2026
- 144 Notice of a proposed sale of restricted stock Oct 28, 2026
- 4 Insider reported a trade Oct 22, 2026
- 4 Insider reported a trade Oct 5, 2026
- 3 Insider reported their initial holding Sep 23, 2026
- 4 Insider reported a trade Aug 25, 2026
Other 8 of 38
- CERT Exchange certified a listing Jun 8, 2026
- 8-A12B Registration of a security for exchange listing May 27, 2026
- ARS Annual report sent to shareholders Apr 8, 2026
- CERT Exchange certified a listing Jun 2, 2025
- 8-A12B Registration of a security for exchange listing May 30, 2025
- ARS Annual report sent to shareholders Apr 2, 2025
- CERT Exchange certified a listing Jun 3, 2024
- 8-A12B Registration of a security for exchange listing May 29, 2024
What to read: Sep 2026 10-Q
SECSift found 5 of 11 sections worth reading, with 1 positive, 14 notable, and 5 negative flags.
Financial Statements (Item 1)
Debt maturity wall, buyback, divestitures, and segment shifts all quantified.Notable- Sold Philippines subsidiary for $75.6M (gain $33.2M) and Bangladesh interest for $6.9M (loss $12.8M).
- Unrealized loss of $71.5M on equity securities in Q3 2026 vs gain of $10.9M in Q3 2025.
- Repurchased 2.97M shares for $518M in 9mo 2026; $865M total used of $2.0B authorization.
- Verizon lease purchase option aggregate price ~$5.0B; AT&T remaining purchase option ~$1.1B.
Management's Discussion (Item 2)
Two major customer disputes (DISH, AT&T Mexico) with quantified reserves and churn; segment results and liquidity details.Notable- Sold Philippines subsidiary and controlling interest in Bangladesh partnership in June 2026; expect to sell Canada operations in Q4 2026.
- Churn was ~5% of tenant billings in 9M 2026, primarily driven by DISH. 100% of DISH revenue reflected in churn since Jan 1, 2026.
- Issued $2.5B in new senior notes (4.000% EUR, 5.300%, 5.560%, 5.750%) to refinance maturing debt and extend maturities.
- Repurchased 2,969,052 shares for $518M in 9M 2026; Board later increased buyback program to ~$3.1B remaining.
Market Risk (Item 3)
Quantified FX risk on large EUR debt and intercompany balances; 33% revenue in foreign currencies.NotableLegal Proceedings (Item 1)
Two active disputes with quantified revenue exposure and reserves; arbitration hearing underway.NotableUnregistered Sales and Repurchases (Item 2)
Large buyback activity with specific dollar amounts and remaining authorization.
What changed: Sep 2026 vs. Jun 2026
About 6% of AMT's Sep 2026 10-Q is new information. 28 paragraphs were added, 274 changed, and 28 removed. Below are the most important lines SECSift identified.
Changed
- Net income dropped to $780.8M from $912.6M for the three months ended September 30, 2026 vs 2025.
- Services revenue fell to $51.4M from $101.1M for the three months ended September 30, 2026 vs 2025.
- Expected non-cancellable lease revenue fell to nearly $49 billion from nearly $50 billion.
- Data center NRSF rose to 3,875 thousand from 3,830 thousand; New York NRSF rose to 417 from 373.
- Exhibit 4.1 changed from Supplemental Indenture No. 2 dated May 27, 2026 to Supplemental Indenture No. 3 dated September 14, 2026.
- Total owned towers rose to 130,787 from 130,509; operated towers fell to 15,735 from 17,096.
Everything here comes from American Tower Corp's own filings on SEC EDGAR. The filing list is rechecked every hour. SECSift analysis was completed on Oct 27, 2026, from the 10-Q for Sep 2026.