Current
$83.6B
5-Year Average
$98.4B
All-Time High
$137B
All-Time Low
$139M
Market cap daily chart for American Tower (AMT)
Aug 2, 2021 – Jul 29, 2026 · 1,253 trading days
Market Cap growth chart for American Tower (AMT) from 2017 to 2026
Latest: +1.5%
Market Cap history table for American Tower (AMT) from 1998 to 2026
| 2026 | $83.6B | +1.5% | +$1.27B | ||
| 2025 | $82.4B | -4.1% | -$3.49B | ||
| 2024 | $85.9B | -14.9% | -$15B | ||
| 2023 | $101B | +2.9% | +$2.81B | ||
| 2022 | $98B | -26.1% | -$34.6B | ||
| 2021 | $133B | +32.4% | +$32.5B | ||
| 2020 | $100B | -2.2% | -$2.26B | ||
| 2019 | $102B | +46.1% | +$32.3B | ||
| 2018 | $70.1B | +13.8% | +$8.48B | ||
| 2017 | $61.6B | +35.8% | +$16.2B | ||
| 2016 | $45.4B | +10.6% | +$4.36B | ||
| 2015 | $41B | +3.7% | +$1.46B | ||
| 2014 | $39.5B | +24.1% | +$7.69B | ||
| 2013 | $31.9B | +3.3% | +$1.01B | ||
| 2012 | $30.9B | +28.5% | +$6.84B | ||
| 2011 | $24B | +15.1% | +$3.15B | ||
| 2010 | $20.9B | +18.7% | +$3.28B | ||
| 2009 | $17.6B | +43.4% | +$5.32B | ||
| 2008 | $12.3B | -32.4% | -$5.88B | ||
| 2007 | $18.2B | +11.6% | +$1.89B | ||
| 2006 | $16.3B | +98.4% | +$8.06B | ||
| 2005 | $8.2B | +98.6% | +$4.07B | ||
| 2004 | $4.13B | +83.3% | +$1.88B | ||
| 2003 | $2.25B | +226.3% | +$1.56B | ||
| 2002 | $690M | -62.0% | -$1.12B | ||
| 2001 | $1.81B | -71.6% | -$4.58B | ||
| 2000 | $6.39B | +39.7% | +$1.81B | ||
| 1999 | $4.58B | +94.0% | +$2.22B | ||
| 1998 | $2.36B | — | — |
- 2026$83.6B+1.5%
- 2025$82.4B-4.1%
- 2024$85.9B-14.9%
- 2023$101B+2.9%
- 2022$98B-26.1%
- 2021$133B+32.4%
- 2020$100B-2.2%
- 2019$102B+46.1%
- 2018$70.1B+13.8%
- 2017$61.6B+35.8%
- 2016$45.4B+10.6%
- 2015$41B+3.7%
- 2014$39.5B+24.1%
- 2013$31.9B+3.3%
- 2012$30.9B+28.5%
- 2011$24B+15.1%
- 2010$20.9B+18.7%
- 2009$17.6B+43.4%
- 2008$12.3B-32.4%
- 2007$18.2B+11.6%
- 2006$16.3B+98.4%
- 2005$8.2B+98.6%
- 2004$4.13B+83.3%
- 2003$2.25B+226.3%
- 2002$690M-62.0%
- 2001$1.81B-71.6%
- 2000$6.39B+39.7%
- 1999$4.58B+94.0%
- 1998$2.36B—
Market Cap values are taken from American Tower's reported income statements (share counts) and end-of-day prices (quarterly 10-Q and annual 10-K filings with the U.S. Securities and Exchange Commission). Each row shows the period end date and the filing date. YoY compares each figure to the same period one year earlier. Amounts are in USD as filed.
About Market Cap at American Tower (AMT)
According to American Tower's latest reported financial statements, the company's latest reported market cap is $76.3B. Market capitalization is the total dollar value of all outstanding shares — shares outstanding × stock price — and the standard measure of a company's equity value. On this page, historical market cap snaps filing-period share counts to closing prices on or before each statement date (not intraday tick data).
Headline figure above is from the reporting period ending (reported ). Chart and table below cover the full reported history back to .
As of the 2026 fiscal year, American Tower (AMT) reported market cap of $83.6B – edged up 1.5% year-over-year.
American Tower market cap compound annual growth for the 2021–2026 (5 years) window is -8.8%, with a net decline across the window.
American Tower market cap peaked at $133B in 2021; the latest annual figure is $83.6B in 2026 (36.9% below peak).
The record annual market cap stands at $133B, reached in 2021; the historical low of $690M was recorded in 2002.
American Tower Market Cap by Year
American Tower Market Cap 2026: $83.6B
American Tower market cap in 2026 was $83.6B, edged up 1.5% from 2025.
American Tower Market Cap 2025: $82.4B
2025's market cap for American Tower came in at $82.4B, edged down 4.1% below 2024.
American Tower Market Cap 2024: $85.9B
American Tower posted market cap of $85.9B in 2024, declined 14.9% below 2023.
American Tower Market Cap 2023: $101B
In 2023, American Tower reported market cap of $101B, edged up 2.9% from 2022.
American Tower Market Cap 2022: $98B
American Tower market cap in 2022 was $98B.
See more financial history for American Tower (AMT).
Sector peers by Market Cap
Real Estate peers of American Tower (AMT), ranked by their latest market cap
| $170B | |
| $136B | |
| $99.4B | |
| $76.4B | |
| $69.6B | |
| $61.4B | |
| $61.1B | |
| $47.5B |
- $170B
- $136B
- $99.4B
- $61.4B
- $61.1B
- $47.5B
Frequently asked questions
Test yourself on AMT
Market Cap — 10 rounds, every one of them AMT against another company. Leave whenever you like.
Practice run — it doesn’t move your skill rating and doesn’t touch the leaderboards. Misses do go into your review queue.
American Tower (AMT) Key Financials
Charts, filings, and peer comparison for every metric
Explore more
Deep-dives across the income statement, cash flow, capital return, and valuation
How this company returns cash to shareholders — buybacks, dividends, and stock splits.