| Make it Social London Ltd | |
| Make Real | East Sussex |
| MakeAnAppLike | |
| MakeBuild Ltd | |
| Makers Academy | |
| MakersCAFE | |
| MakerSpace | |
| Makerversity Ltd | Greater London |
| MakeStudio | |
| Makito | |
| Mako Creative | Wrexham County Borough |
| Malachy Devlin Software Ltd | |
| MalcolmHardie Solutions Ltd | Edinburgh |
| Mallcomm Ltd | |
| Mallinckrodt plc | |
| Mallon Technology Ltd | Mid-Ulster |
| MALO Creative Media | |
| Malted AI | |
| Malvern Panalytical Ltd | |
| MAM Software Ltd | South Yorkshire |
| Mamba Marketing | |
| Mamu Computing | Lincolnshire |
| Man Alive | |
| Man or Mouse Studio Ltd | |
| Manage My Hosting | North Lanarkshire |
| Managed Enterprise Technologies | West Midlands |
| Managed247 Ltd | Buckinghamshire |
| Management Computer Systems Ltd | Dorset |
| Management Solutions | Edinburgh |
| Management Training and Development Ltd | West Midlands |
| Manchester Business Resources | Greater Manchester |
| Manchester Data Recovery | Greater Manchester |
| Manchester Digital | Greater Manchester |
| Manchester IT Services | Greater Manchester |
| Manchester Metropolitan University | Greater Manchester |
| Manchester Metropolitan University - Department of Computing and Mathematics | Greater Manchester |
| Manchester PC | |
| Manchester Science Partnerships | Greater Manchester |
| Mandarin Global Ltd | |
| Mandata | |
| Mando | Merseyside |
| Mango Electronics | |
| Mangopay | |
| Manifesto Digital Ltd | |
| MansvMachine | |
| ManSys Ltd | West Sussex |
| Manta Ray | Greater London |
| Manticore Software Ltd | |
| Mantra Design Ltd | Kent |
| Mantracourt Electronics Ltd | Devon |