American Tower Corp
American Tower, one of the largest global REITs, is a leading independent owner, operator and developer of multitenant communications real estate with a portfolio of over 149,000 communications sites and a highly interconnected footprint of U.S. data center facilities.
Market Cap & Net Worth: American Tower Corp (AMT)
American Tower Corp (NYSE:AMT) has a market capitalization of $86.47 Billion ($86.47 Billion) as of March 18, 2026. Listed on the NYSE stock exchange, this USA-based company holds position #237 globally and #187 in its home market, demonstrating a -2.06% decrease in market value over the past year.
Market capitalization, also known as net worth in stock markets, is calculated by multiplying American Tower Corp's stock price $184.71 by its total outstanding shares 468146623 (468.15 Million).
American Tower Corp Market Cap History: 2015 to 2026
American Tower Corp's market capitalization history from 2015 to 2026. Data shows growth from $37.08 Billion to $86.47 Billion (8.54% CAGR).
Index Memberships
American Tower Corp is a constituent of 2 market indices:
| Index | Total Market Cap | Weight (%) | Rank by Market Cap |
|---|---|---|---|
|
S&P 500 Index
GSPC
|
$53.10 Trillion | 0.22% | #118 of 503 |
|
S&P 100
OEX
|
$37.25 Trillion | 0.31% | #82 of 101 |
Weight: American Tower Corp's market cap as a percentage of total index value. Rank: Position among all constituents by market cap.
American Tower Corp Market Cap to Earnings & Revenue Ratios Timeline
This chart shows how American Tower Corp's valuation ratios have evolved. The Price to Sales (P/S) ratio compares market cap to revenue, while the Price to Earnings (P/E) ratio compares market cap to net income. Lower values may indicate a more undervalued company relative to its financial performance.
Latest Price to Sales (P/S) Ratio
8.48x
American Tower Corp's market cap is 8.48 times its annual revenue
3.57x
Higher than industry averageLatest Price to Earnings (P/E) Ratio
38.08x
American Tower Corp's market cap is 38.08 times its annual earnings
45.83x
Lower than industry averageWhat These Ratios Tell Investors:
- Price to Sales (P/S) Ratio: Shows how much investors are paying for each dollar of the company's sales. Lower P/S ratios may indicate undervaluation.
- Price to Earnings (P/E) Ratio: Shows how much investors are paying for each dollar of the company's earnings. This is one of the most common valuation metrics.
- Trends in these ratios over time can indicate changing investor sentiment about the company's future growth prospects.
- Industry comparison provides context for whether the company is valued higher or lower than peers.
| Year | Market Cap (USD) | Revenue (USD) | Net Income (USD) | P/S Ratio | P/E Ratio |
|---|---|---|---|---|---|
| 2015 | $37.08 Billion | $4.77 Billion | $685.07 Million | 7.77x | 54.13x |
| 2016 | $41.25 Billion | $5.79 Billion | $956.42 Million | 7.13x | 43.13x |
| 2017 | $56.80 Billion | $6.66 Billion | $1.24 Billion | 8.52x | 45.85x |
| 2018 | $64.37 Billion | $7.44 Billion | $1.24 Billion | 8.65x | 52.06x |
| 2019 | $95.18 Billion | $7.58 Billion | $1.89 Billion | 12.56x | 50.42x |
| 2020 | $94.74 Billion | $8.04 Billion | $1.69 Billion | 11.78x | 56.04x |
| 2021 | $125.90 Billion | $9.36 Billion | $2.57 Billion | 13.45x | 49.03x |
| 2022 | $93.58 Billion | $9.65 Billion | $1.77 Billion | 9.70x | 53.00x |
| 2023 | $98.62 Billion | $10.01 Billion | $1.48 Billion | 9.85x | 66.49x |
| 2024 | $85.86 Billion | $10.13 Billion | $2.25 Billion | 8.48x | 38.08x |
Competitor Companies of AMT by Market Capitalization
Companies near American Tower Corp in the global market cap rankings as of March 18, 2026.
Key companies related to American Tower Corp by market ranking:
- Equinix Inc (NASDAQ:EQIX): Ranked #218 globally with a market cap of $92.84 Billion USD.
- Digital Realty Trust Inc (NYSE:DLR): Ranked #394 globally with a market cap of $55.29 Billion USD.
- Crown Castle (NYSE:CCI): Ranked #586 globally with a market cap of $36.18 Billion USD.
- Iron Mountain Incorporated (NYSE:IRM): Ranked #686 globally with a market cap of $29.90 Billion USD.
| Rank | Company | Symbol | Market Cap | Price |
|---|---|---|---|---|
| #218 | Equinix Inc | NASDAQ:EQIX | $92.84 Billion | $984.46 |
| #394 | Digital Realty Trust Inc | NYSE:DLR | $55.29 Billion | $181.25 |
| #586 | Crown Castle | NYSE:CCI | $36.18 Billion | $87.52 |
| #686 | Iron Mountain Incorporated | NYSE:IRM | $29.90 Billion | $107.52 |
American Tower Corp Historical Marketcap From 2015 to 2026
Between 2015 and today, American Tower Corp's market cap moved from $37.08 Billion to $ 86.47 Billion, with a yearly change of 8.54%.
| Year | Market Cap | Change (%) |
|---|---|---|
| 2026 | $86.47 Billion | +5.21% |
| 2025 | $82.19 Billion | -4.27% |
| 2024 | $85.86 Billion | -12.94% |
| 2023 | $98.62 Billion | +5.39% |
| 2022 | $93.58 Billion | -25.67% |
| 2021 | $125.90 Billion | +32.89% |
| 2020 | $94.74 Billion | -0.47% |
| 2019 | $95.18 Billion | +47.87% |
| 2018 | $64.37 Billion | +13.32% |
| 2017 | $56.80 Billion | +37.71% |
| 2016 | $41.25 Billion | +11.22% |
| 2015 | $37.08 Billion | -- |
End of Day Market Cap According to Different Sources
On Mar 17th, 2026 the market cap of American Tower Corp was reported to be:
| Source | Market Cap |
|---|---|
| Yahoo Finance | $86.47 Billion USD |
| MoneyControl | $86.47 Billion USD |
| MarketWatch | $86.47 Billion USD |
| marketcap.company | $86.47 Billion USD |
| Reuters | $86.47 Billion USD |
Market cap values may vary slightly between sources due to differences in calculation methods, timing, and data refresh rates.