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SEC filings · customer concentration · AMT

American Tower's major customers

T-Mobile accounted for 18% of American Tower's revenue in FY 2025, about the same as 19% a year earlier.

4major customers now
59%of revenue from them
0listed suppliers depending on it
2012–2026years covered
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Major customers of American Tower

Customers that American Tower named in its annual report as 10% or more of revenue. A missing year means the customer was below that line or not named.

CustomerShare of revenueChange vs prior yearHistoryLatest filing
T-Mobile18%from 19%FY 2012: 8%FY 2013: 11%FY 2014: 10%FY 2015: 10%FY 2016: 9%FY 2017: 9%FY 2018: 9%FY 2019: 10%FY 2020: 19%FY 2021: 20%FY 2022: 20%FY 2023: 19%FY 2024: 19%FY 2025: 18%14 yearsFY 2025 · filed 24 Feb 2026
AT&TT17%from 18%FY 2012: 18%FY 2013: 18%FY 2014: 20%FY 2015: 24%FY 2016: 21%FY 2017: 19%FY 2018: 19%FY 2019: 22%FY 2020: 22%FY 2021: 19%FY 2022: 19%FY 2023: 18%FY 2024: 18%FY 2025: 17%14 yearsFY 2025 · filed 24 Feb 2026
VerizonVZ14%from 13%FY 2012: 11%FY 2013: 11%FY 2014: 11%FY 2015: 16%FY 2016: 15%FY 2017: 16%FY 2018: 15%FY 2019: 15%FY 2020: 14%FY 2021: 13%FY 2022: 13%FY 2023: 14%FY 2024: 13%FY 2025: 14%14 yearsFY 2025 · filed 24 Feb 2026
Telefonica10%from 10%FY 2022: 10%FY 2023: 10%FY 2024: 10%FY 2025: 10%4 yearsFY 2025 · filed 24 Feb 2026

Formerly disclosed

CustomerShare of revenueChange vs prior yearHistoryLatest filing
Sprint Nextel8%last FY 2018FY 2012: 14%FY 2013: 16%FY 2014: 15%FY 2015: 13%FY 2016: 11%FY 2017: 9%FY 2018: 8%7 yearsFY 2018 · filed 27 Feb 2019

About this data

US-listed companies must disclose revenue from any single customer that reaches 10% of their total (ASC 280). ShadowGraph reads these disclosures from the XBRL data of every 10-K and 20-F we scan, keeps one value per fiscal year (restatements replace earlier values) and links each number to its filing. Companies that describe a customer only as "Customer A" are not listed by name. Figures are as reported; nothing here is investment advice.

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