There are three companies involved in the Regiobahn operations: The Regionale Bahngesellschaft Kaarst-Neuss-Düsseldorf-Erkrath-Mettmann-Wuppertal mbH was incorporated on 8 August 1992 by its constituent cities and districts.

The company is owned as follows: On 1 January 1998 Regiobahn GmbH took over the infrastructure of the railway lines from Neuss to Kaarst and from Düsseldorf-Gerresheim to Mettmann from Deutsche Bahn.

[1] On 7 November 2005, Regiobahn Fahrbetriebsgesellschaft mbH was incorporated as a company to hold the PSO train operations contract with Verkehrsverbund Rhein-Ruhr.

Formerly, Rheinisch-Bergische Eisenbahngesellschaft mbH was a separate company from 1999 until 2006, when it was merged with Veolia Verkehr Rheinland, laterly becoming Transdev.

[2][3] In December 2013, the state of North Rhine-Westphalia agreed to finance 33.7 million of 41.1 million euros to extend the railway from Mettmann Stadtwald to Wuppertal-Vohwinkel via a new connecting curve to the Wuppertal-Vohwinkel–Essen-Überruhr railway, including a new station at Wuppertal-Hahnenfurth/Düssel.