| Machine Learning Mastery Pty Ltd | Victoria |
| Macquarie Automation Pty Ltd | New South Wales |
| Macquarie Group Ltd | New South Wales |
| Macquarie Group Ltd | |
| Macquarie Telecom Group | New South Wales |
| Macquarie University | New South Wales |
| Macquarie University - Centre for Language Technology | New South Wales |
| Macquarie University - Department of Computing | New South Wales |
| Macquarie University - Department of Mathematics and Statistics | New South Wales |
| Macquarie University - School of Computing | |
| Macroware Systems Pty Ltd | New South Wales |
| Macs As New | New South Wales |
| MacZin Pty Ltd | Victoria |
| MAD Electronics Australia Pty Ltd | New South Wales |
| Mad Paws | |
| Made Visual | Victoria |
| MadeComfy | New South Wales |
| Madison Group Enterprises | Queensland |
| Maestro Pty Ltd | New South Wales |
| Mag-Tek Pty Ltd | New South Wales |
| Magento Professionals | New South Wales |
| MagicBrief Pty Ltd | New South Wales |
| Magicdust | New South Wales |
| Magik Digital | Queensland |
| Magneto Communications | New South Wales |
| MailEnable | Victoria |
| MailGuard Pty Ltd | Victoria |
| Main Sequence Ventures | |
| Mainframe Cloud Pty Ltd | New South Wales |
| Mainpac | New South Wales |
| MainPlan Systems | Victoria |
| Maintenance Experts | Queensland |
| Majestic Computer Technology | Victoria |
| Makerspace Adelaide | South Australia |
| Making Spaces Design | Victoria |
| Mamba Digital | Victoria |
| Mamma | Victoria |
| Mammoth Media Pty Ltd | Queensland |
| Managed Growth Australia Pty Ltd | |
| Managed SEO | New South Wales |
| Managed Solutions | Queensland |
| Manatronics Pty Ltd | Queensland |
| Mangano IT | Queensland |
| Manjrasoft Pty Ltd | Victoria |
| Manly Electronics | New South Wales |
| Mantis Technologies | Queensland |
| MaoWebstyle | New South Wales |
| MapData Services Pty Ltd | New South Wales |
| Marby Apps | Victoria |
| March-hare.com | New South Wales |