| Magik Web | Quebec |
| Magik-Net | Quebec |
| MagiLand | |
| MagistroSoft | |
| MagistroSoft, Inc. | Quebec |
| Magitech Corporation | Ontario |
| Magmic | Ontario |
| Magnal Solutions | Quebec |
| MagnaStor | Alberta |
| Magnatech Travel Management Solutions, Inc. | Quebec |
| Magnet Forensics, Inc. | Ontario |
| Magnetar Games Corporation | British Columbia |
| Magnetik Solution Informatique | Quebec |
| MagnetTx Oncology Solutions Ltd | |
| Magnetude Media | British Columbia |
| Magnify Capital, Inc. | |
| Magnitude CG | British Columbia |
| Magnolias Consulting | |
| Magnum Dynalab, Inc. | Ontario |
| Magnus, Inc. | Quebec |
| Magog Technopole | Quebec |
| Magpowersystems, Inc. | |
| MAgroup Tecnickrome | |
| Magstar | Ontario |
| Magstar, Inc. | Ontario |
| Mailsec | |
| Main 57th Computer | British Columbia |
| Main Street Computers | Ontario |
| Main57thComputer | British Columbia |
| Mainly Mac | Ontario |
| Mainsource | Ontario |
| Mainstream Marketing | Ontario |
| MaintainJ | Ontario |
| Maintenance Directe | Quebec |
| Maintenance Logic | Quebec |
| Maintenancecare | |
| Maison Adam | Quebec |
| Maison de l'innovation scociale | |
| Maison de l’innovation sociale | Quebec |
| Maison régionale de l'industrie | |
| Maitop Games | Quebec |
| Maitre D | Quebec |
| Maitre'D | |
| Majestic Laser | Quebec |
| Majestic, Inc. | Ontario |
| MAJiK Systems | |
| Major Tom | |
| Majortech Computers | Ontario |
| MaKami College | |
| Makaya Group, Inc. | Ontario |