| Kundenname | Stadt | Land | 
|---|---|---|
| Mechanica C.V. Delft | Delft | Netherlands | 
| Merck KGaA | Darmstadt | Germany | 
| MERCON Sp. z o.o. | Wloclawek | Poland | 
| MESSER LLC | Houston | United States | 
| Messer SE & Co. KGaA | Bad Soden | Germany | 
| Methanex | Houston | United States | 
| Methanex Corporation | Medicine Hat | Canada | 
| Methanex Corporation Ltd. | Medicine Hat | Canada | 
| Methanex New Zealand Limited | New Plymouth | New Zealand | 
| Methanex Trinidad (Titan) Unlimited | Point Lisas | Trinidad and Tobago | 
| Methanex USA, LLC | Geismar | United States | 
| Metior Industrieanl. Planungs- & Beratungs- GmbH | Graz | Austria | 
| Metra Energie Messtechnik GmbH | Speyer | Germany | 
| Metso Automation GmbH | Leverkusen | Germany | 
| Microfinish Valves Pvt. Ltd. | Dharwad | India | 
| Microflex Services GmbH | Hamburg | Germany | 
| Middle East Oilfield Services L.L.C. | Ruwi, Muscat | Oman | 
| MIL Controls Limited | Aluva | India | 
| Minco (India) Flow Elements Pvt. Ltd. | Mapusa | India | 
| Minco India Pvt. Ltd. | MAPUSA | India | 
| MiRO Mineraloelraffinerie Oberrhein GmbH & Co. KG | Karlsruhe | Germany | 
| MiRO Mineralölraffinerie Oberrhein GmbH & Co. KG | Karlsruhe | Germany | 
| Mitsubishi Hitachi Power Systems India Pvt. Ltd. | Bangalore | India | 
| Mitsubishi Power Europe GmbH | Duisburg | Germany | 
| MMEC Mannesmann GmbH | Düsseldorf | Germany |