The company was formed in 1995 as a unit of
American Radio Systems. In 1998, American Radio Systems merged with
CBS Corporation and
spun off of American Tower. Its first CEO was
Steven B. Dodge, remaining in the position until resigning in 2004. Following the merger, American Tower began international expansion by establishing operations in
Mexico, in 1998, then in
Brazil, in 1999. Around 2000, the company began purchasing numerous
AT&T Long Lines microwave
telephone relay towers from the since defunct
AT&T Communications, Inc., and repurposing them as
cell towers. American Tower also leased
antenna space to various U.S. cell phone providers and to private industries. Most of the former AT&T Long Lines sites had their
horn antennas removed, either by
helicopter or by
crane, to make room for more antennas. Since AT&T's Long Lines Program was decommissioned in the 1980s, and the company no longer had any use for the towers themselves, American Tower now owns most of these tower structures across the U.S., totaling 42,965 in 2022. In 2004
James D. Taiclet was named
CEO and held the title until 2020. In 2005, American Tower acquired
SpectraSite Communications, expanding its global portfolio to over 22,000 owned communications sites, including over 21,000 wireless towers, 400
broadcast towers and 100 in-building DAS (
Distributed Antenna System) sites. The merger helped establish the company as one of the largest tower owners and operators in North America. Between 2007 and 2012, the company expanded internationally with operations in
India,
Peru,
Chile,
Colombia,
South Africa,
Ghana, and
Uganda. In 2013, the company acquired Global Tower Partners for $4.8 billion. This acquisition added sites to the U.S. portfolio and added operations in
Costa Rica and
Panama. In 2020, Tom Bartlett was named president and CEO after Taiclet left to become the CEO of
Lockheed Martin. to strengthen its position in
5G. In early 2023, the company announced plans to erect 4,000 new towers worldwide, mainly in Africa, India and Latin America. Soon after, it divested from fiber optics in Mexico, selling subsidiary ATC Fibra México to Flō Network. Bartlett retired as president, CEO, and a director of the company on February 1, 2024, and was succeeded by Steven Vondran. American Tower divested from its largest international market, after 17 years, selling its ATC India operation to
Brookfield Asset Management via Data Infrastructure Trust in September 2024, for $2.5 billion. In 2025, American Tower topped the list of the "Top 100 Tower Companies in the U.S." and is ranked 363rd on the
Fortune 500. == See also ==