| Company | Industry | City |
| Mad Catz Canada | Mississauga | |
| Magazines Canada | Magazine Publishing | Toronto |
| Majortech | Norval | |
| Malcolm Silver and Co Ltd | Toronto | |
| Manpower Professional | Professional Services | Toronto |
| marblemedia | Toronto | |
| marblemedia | Toronto | |
| March Entertainment Inc. | Toronto | |
| Marketlink Solutions | Toronto | |
| MARSWorks Inc. | Ottawa | |
| MassiveMothCreative Design | Toronto | |
| Max the Mutt Animation School | Animation and Visual FX | Toronto |
| McGill Digital Solutions | Windsor | |
| McLuhan Global Network Conferences | Toronto | |
| McMaster University Multimedia Programme | Harmilton | |
| MediaBox Communications Inc. | Ottawa | |
| Mediacaster Magazine | Toronto | |
| mediaINTELLIGENCE.ca Inc. | Toronto | |
| MELDMEDIA Inc. | Animation and Visual FX | Toronto |
| Merrill Lynch | New York | |
| Metrix Group | Toronto | |
| MicroAide Services Inc. | Toronto | |
| Microtainment | Professional Services | Toronto |
| Mike Cygalski Web Design | London | |
| Milgrom and Associates | Mississauga | |
| Mimesis Capital Corp | Toronto | |
| Mobifest | Toronto | |
| Mobile Entertainment Europe Ltd. | Waterloo | |
| Mobile Reach Media Inc. | Markham | |
| Modern World Communications | Toronto | |
| Monster Factory Inc. | Toronto | |
| Moon Dragon Productions | Whitby | |
| More2Girls Inc | Magazine Publishing | Scarborough |
| Mount Knowledge Inc | Toronto | |
| Movile | Toronto | |
| MRPwebmedia | Thornhill | |
| MRPwebmedia | Games | Thornhill |
| Mulberry Media | Toronto | |
| Multiidea | Toronto | |
| Multimediator | Toronto |