---
schema_version: "secwatch.filing_event.v1"
accession: "0001053507-26-000108"
form_type: "8-K"
ticker: "AMT"
cik: "0001053507"
company_name: "AMERICAN TOWER CORP /MA/"
filed_at: "2026-05-07T23:59:59+00:00"
generated_at: "2026-05-14T21:21:47.274090+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# American Tower amends credit facilities, extends maturities to 2029/2031

## Summary
- Amended $6.0B multicurrency revolver, $4.0B revolver, and $1.0B term loan.
- Maturities extended to May 1, 2029 (revolver and term loan) and May 1, 2031 (revolver).
- Swingline sublimit increased from $50M to $100M under each revolver.
- Added limited conditionality for acquisitions, allowing up to $5.0B in borrowings.
- Lien covenant amended to permit secured debt up to 3.5x Senior Secured Debt to Adjusted EBITDA.

## SEC filing metadata
- accession: 0001053507-26-000108
- form_type: 8-K
- ticker: AMT
- cik: 0001053507
- company_name: AMERICAN TOWER CORP /MA/
- filed_at: 2026-05-07T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 1.01, 2.03
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1053507/000105350726000108/0001053507-26-000108-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1053507/000105350726000108/amt-20260507.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001053507-26-000108
- JSON: https://secwatch.observer/filing/0001053507-26-000108.json
- Plain text: https://secwatch.observer/filing/0001053507-26-000108.txt

## Source-grounded claims
- claim_id: 46988f146a5f209650118a6afe56d8e5469d2dc8
  claim: AMERICAN TOWER CORP /MA/ amended 2021 Multicurrency Credit Facility with Toronto Dominion (Texas) LLC valued at Extended maturity to May 1, 2029; increased swingline sublimit to $100.0 million; amended lien and i (effective 2026-05-07).
  evidence_excerpt: On May 7, 2026, American Tower Corporation (the “Company”) entered into three separate amendment agreements (each an “Amendment” and collectively, the “Amendments”) to amend the agreements for each of its (i) $6.0 billion senior unsecured multicurrency revolving credit facility, as amended and restated on December 8, 2021, as further amended, with Toronto Dominion (Texas) LLC (“TD”) as Administrative Agent (as defined therein) (the “2021 Multicurrency Credit Facility”), (ii) $4.0 billion senior unsecured revolving credit facility, as amended and restated on December 8, 2021, as further amended, with TD as Administrative Agent (as defined therein) (the “2021 Credit Facility”) and (iii) $1.0 billion unsecured term loan, as amended and restated on December 8, 2021, as further amended, with Mizuho Bank, Ltd. as Administrative Agent (as defined therein) (the “2021 Term Loan” and, collectively with the 2021 Multicurrency Credit Facility and the 2021 Credit Facility, the “Loans”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1053507/000105350726000108/0001053507-26-000108-index.htm
- claim_id: f60c77baa0825d71b3f480342ee2d30cab5625b8
  claim: AMERICAN TOWER CORP /MA/ amended 2021 Credit Facility with Toronto Dominion (Texas) LLC valued at Extended maturity to May 1, 2031; increased swingline sublimit to $100.0 million; amended lien and i (effective 2026-05-07).
  evidence_excerpt: On May 7, 2026, American Tower Corporation (the “Company”) entered into three separate amendment agreements (each an “Amendment” and collectively, the “Amendments”) to amend the agreements for each of its (i) $6.0 billion senior unsecured multicurrency revolving credit facility, as amended and restated on December 8, 2021, as further amended, with Toronto Dominion (Texas) LLC (“TD”) as Administrative Agent (as defined therein) (the “2021 Multicurrency Credit Facility”), (ii) $4.0 billion senior unsecured revolving credit facility, as amended and restated on December 8, 2021, as further amended, with TD as Administrative Agent (as defined therein) (the “2021 Credit Facility”) and (iii) $1.0 billion unsecured term loan, as amended and restated on December 8, 2021, as further amended, with Mizuho Bank, Ltd. as Administrative Agent (as defined therein) (the “2021 Term Loan” and, collectively with the 2021 Multicurrency Credit Facility and the 2021 Credit Facility, the “Loans”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1053507/000105350726000108/0001053507-26-000108-index.htm
- claim_id: feff3579386b2f2b0269006df6ef577d41097e0d
  claim: AMERICAN TOWER CORP /MA/ amended 2021 Term Loan with Mizuho Bank, Ltd. valued at Extended maturity to May 1, 2029; amended lien and indebtedness covenants (effective 2026-05-07).
  evidence_excerpt: On May 7, 2026, American Tower Corporation (the “Company”) entered into three separate amendment agreements (each an “Amendment” and collectively, the “Amendments”) to amend the agreements for each of its (i) $6.0 billion senior unsecured multicurrency revolving credit facility, as amended and restated on December 8, 2021, as further amended, with Toronto Dominion (Texas) LLC (“TD”) as Administrative Agent (as defined therein) (the “2021 Multicurrency Credit Facility”), (ii) $4.0 billion senior unsecured revolving credit facility, as amended and restated on December 8, 2021, as further amended, with TD as Administrative Agent (as defined therein) (the “2021 Credit Facility”) and (iii) $1.0 billion unsecured term loan, as amended and restated on December 8, 2021, as further amended, with Mizuho Bank, Ltd. as Administrative Agent (as defined therein) (the “2021 Term Loan” and, collectively with the 2021 Multicurrency Credit Facility and the 2021 Credit Facility, the “Loans”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1053507/000105350726000108/0001053507-26-000108-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.