Who depends on AT&T
4 listed suppliers report AT&T as a customer worth 10% or more of their revenue, led by Crown Castle at 27%.
Get an email when AT&T's customer concentration changes
When a new annual report adds a 10% customer, drops one, or moves a share by 5 points or more, you get the change and the filing link. Up to 10 companies per address, no account, unsubscribe with one click.
Suppliers that depend on AT&T
Listed companies whose annual report names AT&T as a customer worth 10% or more of their revenue. If AT&T cuts orders or switches supplier, these are the companies that feel it.
| Supplier | Its revenue from this company | Change vs prior year | History | Latest filing |
|---|---|---|---|---|
| Crown CastleCCI | 27% | from 25% | 7 years | FY 2025 · filed 23 Feb 2026 |
| Sba CommunicationsSBAC | 20% | from 21% | 7 years | FY 2025 · filed 27 Feb 2026 |
| American TowerAMT | 17% | from 18% | 14 years | FY 2025 · filed 24 Feb 2026 |
| MastecMTZ | 10% | new | 4 years | FY 2025 · filed 26 Feb 2026 |
Formerly disclosed
| Supplier | Its revenue from this company | Change vs prior year | History | Latest filing |
|---|---|---|---|---|
| Ribbon CommunicationsRBBN | 12% | last FY 2019 | 3 years | FY 2019 · filed 11 Mar 2022 |
| Smith Micro SoftwareSMSI | 12% | last FY 2011 | 1 year | FY 2011 · filed 7 Mar 2014 |
| Bloom EnergyBE | 11% | last FY 2018 | 1 year | FY 2018 · filed 22 Mar 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.
All companies · Latest dependency shifts · Bulk data and API