ATM SA engages in the provision of internet, wired telecommunication, and television broadcasting services. It operates through the following business segments: Data Center Services, Telecommunications Services, and Other. The Data Center Services segment offers colocation services and other services related to data center infrastructure. The Telecommunications Services segment includes broadband data transmission services, telecommunications lines leased services, internet access services, and voice services. The company was founded by Tadeusz Czichon in 1989 and is headquartered in Warsaw, Poland.