The shareholders are Chemnitzer Verkehrs AG (CVAG) and RP-Eisenbahn GmbH (RPE).
Regio Infra Service Sachsen was founded on 5 July 2001 as a railway infrastructure company (EIU) for the Chemnitz Model.
The connection between Chemnitz and Stollberg had already been planned in advance as a pilot line according to this concept.
Already on December 15, 2002, the scheduled electric train service with Regio light rail vehicles of the City-Bahn Chemnitz could be started there.
Further lines in the Chemnitz area were simultaneously prepared for preliminary operation with diesel railcars.