| Marshall Technology Solutions, Inc. | Illinois |
| Marshall University Computer and Information Technology | West Virginia |
| Marshall University Mathematics | West Virginia |
| Marshall Wace North Amerca, L.P. | |
| Marshall Wolf Automation, Inc. | Illinois |
| Marshallnet | Iowa |
| MarshallSoft Computing, Inc. | Alabama |
| Marstudio, Inc. | |
| MarsX | |
| MarTech Series | California |
| Martech Systems, Inc. | Wisconsin |
| Martek Automation | California |
| Martian | |
| Martian Software, Inc. | |
| Martin and Associates | Ohio |
| Martin Company | Texas |
| Martin Fowler | |
| Martin H. Weissman | |
| Martin Luther College | Minnesota |
| Martin Pharmaceuticals, Inc. | |
| Martin UAV | Texas |
| Martin University | Virginia |
| Martin Williams Advertising | |
| Martindale Associates, Inc. | Massachusetts |
| MartinScott | Virginia |
| Marubeni Corporation | |
| MarVac Electronics | California |
| Marvel Infotech, Inc. | New Jersey |
| Marvel Technologies, Inc. | Michigan |
| MarvelBiome, Inc. | Massachusetts |
| Marvell Semiconductor, Inc. | California |
| Marvelmind Robotics | California |
| Marvelous Media Solutions, LLC | |
| MarvelsSoft | |
| Marveri | |
| Marvin Huffaker Consulting, Inc. | Arizona |
| Marvin Test Solutions, Inc. | California |
| Marvist Consulting, LLC | New Jersey |
| Marway Power Solutions, Inc. | |
| MarWell Bio, Inc. | |
| Marx Buscemi Eisbrenner Group | |
| MARX CryptoTech, L.P. | Georgia |
| Mary Baldwin University | Virginia |
| Mary Brown Design Ltd | |
| Mary Lee Weir | |
| Mary Rabalais | |
| Mary Rose Cook | |
| Marygold & Co. | Colorado |
| Maryland Apple Corps | Maryland |
| Maryland ColdFusion User's Group | Maryland |