| Kundenname | Stadt | Land |
|---|---|---|
| Lippert - Fuhrmann GmbH | Borken | Germany |
| Liquid Gas International GmbH | Bonn | Germany |
| LMR-Technik GmbH | Weil am Rhein | Germany |
| Lummus Novolen Technology GmbH | Mannheim | Germany |
| LURGI Chemieanlagenbau Chemnitz GmbH | Chemnitz | Germany |
| Lurgi Entsorgung GmbH | Ratingen | Germany |
| Lurgi Lentjes | Essen | Germany |
| Lurgi Metallurgi GmbH | Frankfurt | Germany |
| M+W Central Europe GmbH | Schwedt/Oder | Germany |
| m-tech gmbh | Forchtenberg | Germany |
| Magdeburger Industriearmatur-Manufaktur GmbH | Magdeburg | Germany |
| MAGWEN Valves GmbH | Osterweddingen | Germany |
| Mahler AGS GmbH | Stuttgart | Germany |
| MAKE IT GmbH | Chemnitz | Germany |
| MAN GHH | Geisenheim | Germany |
| MAN Gute Hoffnungshütte AG | Oberhausen | Germany |
| Mankenberg GmbH | Lübeck | Germany |
| Mannesmann Demag Hüttentechnik | Mönchengladbach | Germany |
| Märkische Faser AG | Premnitz | Germany |
| Martin GmbH | München | Germany |
| Martinswerk GmbH | Bergheim | Germany |
| Maschinenbau Scholz GmbH & Co. KG | Coesfeld | Germany |
| Maschinenfabrik Neuman & Esser GmbH & CoKG | Übach-Palenberg | Germany |
| Maximator Hydrogen GmbH | Nordhausen | Germany |
| McPhy Energy Deutschland GmbH | Wildau | Germany |