American Tower AMT Market capitalization
Market capitalization at other companies
Other financials
Where this comes from
Computed from the period-end share price: $80.44B.
The official record: American Tower’s 10-Q, filed April 28, 2026, on SEC EDGAR. View the filing →
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Questions, answered.
- What is American Tower's market capitalization?
- American Tower (AMT) reported market capitalization of $80.44B in Q1 2026.
- How has American Tower's market capitalization changed year-over-year?
- American Tower's market capitalization decreased by 20.9% year-over-year, from $101.72B to $80.44B.
- What is the long-term trend for American Tower's market capitalization?
- Over 4 years (2021 to 2025), American Tower's market capitalization has grown at a -6.0% compound annual growth rate (CAGR), from $485.98B to $378.79B.
- What does market capitalization mean?
- What the stock market says the company's equity is worth.
- How do you interpret market capitalization?
- A size and market-sentiment gauge, not a quality measure — interpret through valuation ratios (P/E, P/S) that relate it to fundamentals.
- How does market capitalization compare across companies?
- Comparable across companies as a size class; the input to every equity-price valuation multiple.