| Marketing Databases International | North Holland |
| MarkUp | Gelderland |
| Marnix Academie | Utrecht |
| Marsman IT-Solutions | |
| Martin Fitzpatrick | Utrecht |
| Martinic | North Holland |
| Marvia | North Holland |
| Master IT | North Brabant |
| Masugro | Utrecht |
| Matas Electronics B.V. | North Brabant |
| MathGrapher | South Holland |
| Matrixian B.V. | |
| Matsiemaal | |
| Mavim B.V. | South Holland |
| Maxcode | |
| Maxcom B.V. | Gelderland |
| Maxlead | South Holland |
| Maxxton B.V. | Zeeland |
| MaXXus Communications | South Holland |
| Mazarine Energy | |
| MCH information & communication | Utrecht |
| MCX Administration Services B.V. | Gelderland |
| MCXess B.V. | |
| MDA Consultancy | North Holland |
| MDF | |
| Meant2B ICT Professionals | Utrecht |
| Meatable | |
| Meatless | |
| Mechatronica Magazine | Gelderland |
| Medal B.V. | |
| MedEye | North Brabant |
| Media Distillery International B.V. | |
| Media Homeservice | South Holland |
| Media.Monks | North Holland |
| MediaGeni | North Holland |
| Mediaservice Maastricht | Limburg |
| Medify B.V. | |
| Medimatics | Limburg |
| Medion Monile | Limburg |
| Medis Medical Imaging Systems B.V. | |
| Meershap | North Holland |
| Meesterlijk | North Holland |
| Meetingselect | North Holland |
| Mega Computer Services | South Holland |
| MEGA1 Computers | South Holland |
| Megasnel.nl | Flevoland |
| Megawatt | |
| MELON | South Holland |
| Memocom | South Holland |
| MendriX | Utrecht |