| Kundenname | Stadt | Land |
|---|---|---|
| ME Engineering GmbH | Marl | Germany |
| Merck Life Science KGaA | Darmstadt | Germany |
| Messer SE & Co. KGaA | Bad Soden | Germany |
| Metra Energie Messtechnik GmbH | Speyer | Germany |
| Metso Automation GmbH | Leverkusen | Germany |
| Microflex Services GmbH | Hamburg | Germany |
| MiRO Mineraloelraffinerie Oberrhein GmbH & Co. KG | Karlsruhe | Germany |
| MiRO Mineralölraffinerie Oberrhein GmbH & Co. KG | Karlsruhe | Germany |
| Mitsubishi Power Europe GmbH | Duisburg | Germany |
| MMEC Mannesmann GmbH | Düsseldorf | Germany |
| Modulare Planungs- und Konstruktionstechnik GmbH | Köln | Germany |
| mopran GmbH | Butzbach | Germany |
| Moritz J. Weig GmbH & Co. KG | Mayen | Germany |
| müller co-ax ag | Forchtenberg | Germany |
| müller quadax gmbh | Forchtenberg | Germany |
| MVV Enamic IGS Gersthofen | Gersthofen | Germany |
| N+S GmbH & Co. KG | Gelsenkirchen | Germany |
| Neckarwerke Stuttgart AG | Stuttgart | Germany |
| Neptune Energy Deutschland GmbH | Lingen/Ems | Germany |
| Nino | Nordhorn | Germany |
| Nippon Gases Deutschland Holding GmbH | Hürth | Germany |
| NNE Pharmaplan GmbH | Bad Homburg | Germany |
| Nobian GmbH | Ibbenbüren | Germany |
| Nobian GmbH | Frankfurt am Main | Germany |
| Noell-LGA Gastechnik GmbH | Remagen | Germany |