---
schema_version: "secwatch.filing_event.v1"
accession: "0001053507-25-000129"
form_type: "8-K"
ticker: "AMT"
cik: "0001053507"
company_name: "AMERICAN TOWER CORP /MA/"
filed_at: "2025-09-05T23:59:59+00:00"
generated_at: "2026-05-17T07:50:19.441868+00:00"
event_type: "litigation"
sentiment: "negative"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# American Tower discloses legal dispute with AT&T Mexico; ~$300M tenant revenue at risk

## Summary
- AT&T Mexico withholding tower rents since start 2025; represented ~$300M tenant revenue in 2024.
- Company incurred $10M reserves in Q2 2025 and expects additional reserves if withholding continues.
- Arbitration hearing scheduled for August 2026; company asserts valid defenses and enforceable MLA.
- DISH represents ~2% of total annual property revenue and ~4% of U.S. & Canada property revenue.

## SEC filing metadata
- accession: 0001053507-25-000129
- form_type: 8-K
- ticker: AMT
- cik: 0001053507
- company_name: AMERICAN TOWER CORP /MA/
- filed_at: 2025-09-05T23:59:59+00:00
- event_type: litigation
- sentiment: negative
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1053507/000105350725000129/0001053507-25-000129-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1053507/000105350725000129/amt-20250903.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001053507-25-000129
- JSON: https://secwatch.observer/filing/0001053507-25-000129.json
- Plain text: https://secwatch.observer/filing/0001053507-25-000129.txt

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