Železničná spoločnosť Slovensko, a.s. (ZSSK) () is a Slovak state-owned passenger train company based in Bratislava. In 2002 a company Železničná spoločnosť was established as a successor of personal and cargo transport part of the Železnice Slovenskej republiky. In 2005 this new company was further split into "Železničná spoločnosť Slovensko, a. s." providing Passenger transport services and "Železničná spoločnosť Cargo Slovakia, a. s." (ZSSK CARGO or ZSCS) providing cargo services. The fleet of the Železničná spoločnosť Slovensko was partially modernised with the introduction of 8 3-car units and 2 4-car dual-voltage units of the new Škoda 7Ev EMUs. The contract included the option for additional 5 3-car units and 10 4-car units. The company ordered in August 2021 from Škoda Transportation another nine trains for Košice region. There is also a purchase option for 11 additional trains. Further new EMUs will enter service in 2023.