American Tower Market Cap

American Tower has a market cap or net worth of $85.53 billion as of October 20, 2026. It is the 285th most valuable company in the world and the 155th biggest in the United States. Its market cap has decreased by 4.51% in one year.

Market Cap

85.53B

Enterprise Value

128.75B

1-Year Change

-4.51%

Global Rank

#285

Country Rank

#155 United States

ChartMarket Cap Chart

Chart

Since December 1, 1998, American Tower's market cap has increased from $2.58B to $85.53B, an increase of 3,217.37%. That is a compound annual growth rate of 13.37%.

Market Cap History

Date	Market Cap	% Change
Oct 20, 2026	85.53B	4.06%
Dec 31, 2025	82.19B	-4.10%
Dec 31, 2024	85.71B	-14.84%
Dec 29, 2023	100.64B	2.02%
Dec 30, 2022	98.64B	-25.95%
Dec 31, 2021	133.21B	33.60%
Dec 31, 2020	99.71B	-2.05%
Dec 31, 2019	101.80B	46.09%
Dec 31, 2018	69.68B	13.89%
Dec 29, 2017	61.18B	36.01%
Dec 30, 2016	44.99B	9.55%
Dec 31, 2015	41.07B	4.78%
Dec 31, 2014	39.19B	24.41%
Dec 31, 2013	31.50B	3.11%
Dec 31, 2012	30.55B	29.52%
Dec 30, 2011	23.59B	14.45%
Dec 31, 2010	20.61B	18.80%
Dec 31, 2009	17.35B	49.14%
Dec 31, 2008	11.63B	-32.54%
Dec 31, 2007	17.24B	8.70%
Dec 29, 2006	15.86B	42.13%
Dec 30, 2005	11.16B	165.65%
Dec 31, 2004	4.20B	76.85%
Dec 31, 2003	2.38B	244.13%
Dec 31, 2002	690.30M	-62.64%

View and export this data all the way back to 1998. Sign Up Today.

Market Capitalization

Market capitalization, also called net worth, is the total value of all of a company's outstanding shares. It is calculated by multiplying the stock price by the number of shares outstanding.

Formula: Market Cap = Stock Price * Shares Outstanding

Related Stocks

Company	Market Cap
Equinix	97.29B
Digital Realty Trust	66.46B
Crown Castle	35.00B
Iron Mountain	33.49B
SBA Communications	19.84B
Lamar Advertising Company	15.24B
Weyerhaeuser Company	14.13B
Gaming and Leisure Properties	11.76B

Market Cap Rankings