| Microdata Systemhaus GmbH | North Rhine-Westphalia |
| MicroDoc Computersysteme GmbH | Bavaria |
| MicroHarvest GmbH | |
| microm Micromarketing-Systeme und Consult GmbH | North Rhine-Westphalia |
| Micromata GmbH | Hesse |
| MicroNova AG | Bavaria |
| Micropayment GmbH | Berlin |
| Micropsi Industries GmbH | Berlin |
| Microserver GmbH | Bremen |
| Microsoft Germany | Bavaria |
| microsonic GmbH | North Rhine-Westphalia |
| Microsons | North Rhine-Westphalia |
| Microstep Information Technologies AG | Bavaria |
| MicroStream | |
| Microtech GmbH | Rhineland-Palatinate |
| Microtonic GmbH | Bavaria |
| microTOOL | Berlin |
| MicroVision GmbH | |
| Microwave Photonics GmbH | |
| micro\ce Computer und Software Vertrieb GmbH | Bavaria |
| MICUS Strategieberatung GmbH | North Rhine-Westphalia |
| MID GmbH | Bavaria |
| Midas Pharma GmbH | |
| Midata Service GmbH | Hesse |
| Mietwise | |
| MIFcom GmbH | Bavaria |
| MIG Verwaltungs AG | Bavaria |
| migosens GmbH | North Rhine-Westphalia |
| Mihas GmbH | Baden-Württemberg |
| MIHE-Software | Hesse |
| MIK GmbH | Baden-Württemberg |
| mikrolab Entwicklungsgesellschaft für Elektroniksysteme mbH | Bavaria |
| Mikrotron GmbH | Bavaria |
| Milanconsult GmbH | Baden-Württemberg |
| Milch & Zucker - The Marketing Software Company AG | Hesse |
| MILEPAY | |
| Milhouse GmbH | |
| Milk the Sun GmbH | |
| millepondo services GmbH & Co. KG | |
| Miller Leasing Miete GmbH | Hesse |
| Million Ventures | |
| Miltenyi Bioindustry | |
| Miltenyi Biotec | |
| Miltronik Steuer- und Leistungselektronik GmbH & Co. KG | North Rhine-Westphalia |
| Mily Technologies GmbH | |
| MiMa IT Services | |
| Mimax Mediengestalung | Lower Saxony |
| Mimetik UG | |
| Mimi Hearing Technologies GmbH | |
| MiMuX Software UG (haftungsbeschränkt) | Hesse |