American Tower Corp /ma/
A global owner and operator of wireless communications towers and data centers, leasing space on its sites to carriers like AT&T, T-Mobile, Verizon, and Airtel. It grew out of a broadcasting company founded in Boston in 1995, when its founder realized wireless carriers were each building duplicate towers—so he built shared ones instead, and spun the business off as its own company in 1998. It later expanded into data centers by buying CoreSite in 2021, and converted to a REIT in 2012.
5.25% Mandatory Convertible Preferred Stock, Series A