| Majorel | |
| Mangrove Capital Partners | Luxembourg |
| Markeasy Communication | Esch-sur-Alzette |
| MarketLeap | |
| Medirel Meditech | |
| Mesh S.à.r.l. | Diekirch |
| Metalogic S.à.r.l. | Mersch |
| MGK Technologies S.à.r.l. | Esch-sur-Alzette |
| Microdistri.com | Clervaux |
| Micromed S.A. | Luxembourg |
| Microtis S.A. | Capellen |
| MiddleGame Ventures | Luxembourg |
| Midori | Remich |
| Millicom | Luxembourg |
| MindGeek S.à.r.l. | |
| Ministère de la Digitalisation | |
| Mission Space | |
| Mitotech S.A. | |
| MobiTile | Luxembourg |
| Mojo Capital | Luxembourg |
| Molecular Plasma Group S.A. | |
| Monetize Angels | Luxembourg |
| MoodMe | |
| Morfin | |
| Motion-S | |
| Motion-S S.A. | |
| Movemtum | |
| mpulse S.A. | Esch-sur-Alzette |
| Multidata S.à.r.l. | Clervaux |
| MUM digital agency | Clervaux |
| MyMedBot | |
| Myriado GmbH | |
| MyVoipTraffic | Luxembourg |
| NAC Partners | Luxembourg |
| NadiFin | |
| Nation1 GP S.à r.l. | |
| National Cybersecurity Competence Center Luxembourg | |
| Neobuild S.A. | Esch-sur-Alzette |
| NEOFACTO | Esch-sur-Alzette |
| Neon Internet | |
| Neopixl | Esch-sur-Alzette |
| Netcare S.à.r.l. | Luxembourg |
| Netcompany-Intrasoft | Luxembourg |
| NetGine | Luxembourg |
| Netmed.lu | |
| NETsite.lu S.à.r.l. | Redange |
| Netway | Luxembourg |
| NetZetera S.à.r.l. | Luxembourg |
| NewSpace Capital | |
| NewSpace Europe | |