| Monkey Tools, LLC | Washington |
| Monkeybrains.net | California |
| Monkeyfoot Interactive | Iowa |
| MonkeyJava Studio | California |
| MonkeyLearn, Inc. | California |
| MONKEYmedia, Inc. | Texas |
| Monkeymen | California |
| Monmouth College | Illinois |
| Monmouth Telecom | New Jersey |
| Monmouth University Department of Computer Science and Software Engineering | New Jersey |
| Monmouth University Department of Mathematics | New Jersey |
| Mono Project | Utah |
| Monobind, Inc. | California |
| Monobot CX | |
| Monoc Securities, LLC | |
| Monoceros Biosystems, LLC | California |
| Monocle | New York |
| Monocle Analytics | Arizona |
| Monod Bio | Washington |
| MonoDevelop | Utah |
| MonoGame Foundation, Inc. | |
| Monogram Orthopaedics | Texas |
| Monogram Technologies | |
| Monolithic Internet, LLC | New Hampshire |
| Monolithic Power Systems | Washington |
| Monolithic Power Systems, Inc. | |
| Monomer Bio, Inc. | |
| Monomoy Capital Partners | |
| Monon Technology Group | Indiana |
| Monopar Therapeutics, Inc. | |
| Monosnap, Inc. | |
| Monosoft | |
| Monotype Imaging, Inc. | Massachusetts |
| Monroe Capital, LLC | |
| Monroe Infrared Technology, Inc. | Maine |
| Monroe Research | |
| Monroe University | New York |
| Monsido, LLC | Massachusetts |
| Monsoonfish, Inc. | Delaware |
| Monster API | California |
| Monster Labz, LLC | |
| Monster Link Marketing | |
| Monster Tamer Web Hosting | |
| Monster Worldwide | Massachusetts |
| Monster XP | Florida |
| MonsterCloud.com | Florida |
| MonsterWeb | |
| Montage Software, LLC | |
| Montage Ventures | California |
| Montage Videos, Inc. | |