| MagmaLabs | |
| Magna Infotech Ltd | Connecticut |
| MAGNA Software | Florida |
| Magna-Power Electronics, Inc. | New Jersey |
| Magna5 | Pennsylvania |
| MagnaBioSciences, LLC | California |
| Magnatech Business Systems, Inc. | New York |
| Magnatron, Inc. | Tennessee |
| Magnesium Development Company, LLC | Michigan |
| Magnet Biomedicine | Massachusetts |
| Magnet Co., LLC | Ohio |
| Magnet Commerce | Florida |
| Magneta Health | North Carolina |
| Magnetar Capital, LLC | |
| Magnetic Insight, Inc. | California |
| Magnetic Sensor Systems | California |
| MagneticOne | Texas |
| magneticpole.com | Ohio |
| MagneticUSA | Florida |
| Magnetik | |
| Magnetiks Search Marketing, LLC | Texas |
| Magnetize | |
| Magneto IT Solutions | New York |
| Magneto Software | California |
| MagniComp | California |
| Magnifez Technologies, Inc. | Delaware |
| Magnifico | |
| Magnify Payments | Pennsylvania |
| Magnify Ventures | California |
| Magnit | California |
| Magnite, Inc. | |
| Magnitude Marketing | Indiana |
| Magnitude Software, Inc. | Texas |
| Magnolia Accounting Solutions | Arkansas |
| Magnolia Development Group | Louisiana |
| Magnolia Medical Technologies, Inc. | Washington |
| Magnopus | |
| Magnum Computers | California |
| Magnum Computers, Inc. | Ohio |
| Magnum Electronics, Inc. | Delaware |
| Magnum Print Solutions | Washington |
| Magnum Towers | California |
| Magnus Designs, LLC | |
| Magnus IT | Ohio |
| Magnus Medical, Inc. | California |
| Magnus Software | Michigan |
| Mago SEO | |
| Magoware | |
| Magpi | District of Columbia |
| Magtax | California |