Železničná spoločnosť Slovensko, a.s. (ZSSK) ((lit. 'The Railway Company Slovakia')) 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."[2] providing Passenger transport services and "Železničná spoločnosť Cargo Slovakia, a. s." (ZSSK CARGO or ZSCS)[3] 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. [4][5] 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.