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AMERICAN TOWER CORP /MA/
AMT - Company ID 0001053507
Market cap$89.75 B
Rank#181
Filings1,012
Market capitalization of AMERICAN TOWER CORP /MA/
As of 2026-11-06, AMERICAN TOWER CORP /MA/ (AMT) has a market capitalization of $89.75 B, making it the #181 most valuable US-listed company.
Recent market cap readings
| Date | Market cap |
|---|---|
| 2026-11-06 | $89.75 B |
| 2026-11-05 | $89.97 B |
| 2026-11-04 | $89.80 B |
| 2026-11-03 | $86.86 B |
| 2026-11-02 | $87.33 B |
| 2026-11-01 | $87.49 B |
| 2026-10-31 | $87.49 B |
| 2026-10-30 | $88.32 B |
| 2026-10-29 | $86.60 B |
| 2026-10-28 | $84.66 B |
| 2026-10-27 | $85.62 B |
| 2026-10-26 | $87.72 B |
Market Cap of similar companies
Frequently asked questions
What is AMERICAN TOWER CORP /MA/'s market cap?
As of 2026-11-06, AMERICAN TOWER CORP /MA/ (AMT) has a market capitalization of $89.75 B, making it the #181 most valuable US-listed company.
Where does AMERICAN TOWER CORP /MA/ rank by market cap?
AMERICAN TOWER CORP /MA/ is the #181 largest US-listed company by market capitalization.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.