CoreSite Recognized as a Representative Vendor in the 2025 Gartner® Market Guide for Data Center Colocation

We Believe Inclusion in Report Reinforces CoreSite’s Successful Track Record in Delivering Enterprise-Grade, AI-Ready Data Center Colocation Services at Scale DENVER, CO - (October 23, 2025) – CoreSite, an American Tower company (NYSE: AMT) empowering critical business and AI workloads that impact everyday life through interconnected data center solutions, today announced that it has been recognized as a Representative Vendor in the 2025 Gartner® Market Guide for Data Center Colocation.1 According to Gartner, “These providers offer robust, secure, and highly available facilities, complemented by advanced network connectivity, comprehensive compliance frameworks, and a breadth of value-added services that align with evolving enterprise requirements." As the colocation market evolves beyond space and power, businesses are looking for data center providers with direct, low-latency connections to a robust ecosystem that offers the required uptime, cost efficiency and advanced cooling capabilities needed to support their hybrid IT strategies. “We believe that CoreSite’s recognition in the Gartner Market Guide validates our commitment to delivering highly interconnected, purpose-built data center campuses designed to meet the growing demands of modern enterprises,” said Juan Font, President and CEO of CoreSite and SVP of American Tower. “Our data center solutions combine security, compliance, scalability, connectivity and flexibility to enable true business agility, while offering the on-site technical expertise and advanced cooling solutions required to support today’s high-density and AI-driven workloads.”