| Kundenname | Stadt | Land |
|---|---|---|
| REGLER + ARMATUREN Terschüren GmbH | Duisburg | Germany |
| Reineke Meß- und Regeltechnik GmbH | Bochum | Germany |
| REMBE® GmbH Safety + Control | Brilon | Germany |
| Rheinisch-Westfälische Technische | Aachen | Germany |
| RKB Raffinerie-Kraftwerks-Betriebs GmbH | Leuna | Germany |
| RMG Messtechnik GmbH | Butzbach | Germany |
| Röhm GmbH | Darmstadt | Germany |
| Rohrplan Ing.-Büro für Anlagen- | Schwedt | Germany |
| Roland Kühne GmbH | Köln | Germany |
| Rösberg Engineering GmbH | Karlsruhe | Germany |
| Rösberg Engineering GmbH | Ludwigshafen | Germany |
| RTI Automation GmbH | Leipzig | Germany |
| RUHR OEL GmbH | Gelsenkirchen | Germany |
| Ruhrkohle Bergbau AG | Gelsenkirchen | Germany |
| Ruhrkohle Bergbau AG | Dortmund | Germany |
| Ruhrkohle Niederrhein | Dortmund | Germany |
| Ruhrkohle Niederrhein AG | Duisburg | Germany |
| Rütgers Chemicals GmbH | Castrop-Rauxel | Germany |
| RWE Generation SE | Lingen | Germany |
| RWE Group Business Services GmbH | Dortmund | Germany |
| RWE Group Business Services GmbH | Köln | Germany |
| RWE IT GmbH | Essen | Germany |
| RWE Power | Bergheim | Germany |
| RWE Power AG | Hürth | Germany |
| RWE Power AG | Grevenbroich-Neurath | Germany |