| Mt. Mansfield Media, Inc. | |
| Mt. San Antonio College | California |
| Mt. San Jacinto College | California |
| MTC Communications | Illinois |
| MTC Technologies | Iowa |
| MTCO Communications | Illinois |
| MTech Systems USA, LLC | Georgia |
| MTech, LLC | West Virginia |
| MTG EnterPrizes | Idaho |
| MTI Group, Inc. | California |
| MTI Medical Technology Industries, Inc. | Utah |
| MTI Systems, Inc. | Massachusetts |
| MTI-Milliren Technologies, Inc. | Massachusetts |
| mtibio | Nevada |
| MTK Electronics, Inc. | New York |
| MTL Advisory | |
| MTMnet, Inc. | Nebraska |
| Mtn. Dog Media | |
| MTP Software | Massachusetts |
| mTrip, Inc. | |
| MTS Services | New Hampshire |
| MTW Solutions, LLC | Missouri |
| MTX Group, Inc. | Texas |
| Mu Sigma, Inc. | Illinois |
| Mubert, Inc. | Delaware |
| Muck Rack | |
| Mucker Capital | California |
| Mucommune, LLC | North Carolina |
| MudCreek Software, Inc. | Pennsylvania |
| Mudd Advertising | |
| Muddy Waters Marketing, LLC | |
| Mudrex, Inc. | |
| Mueller Design Interactive | California |
| Mueller Solutions | |
| Mueon | |
| MUFG Investor Services | |
| Muhlenberg College | Pennsylvania |
| Muir AI | |
| Mujin Corporation | Georgia |
| MūL Technologies | Wisconsin |
| Mulberry | New York |
| Mulberry Technologies, Inc. | Maryland |
| MuleSoft | California |
| Mullen Automotive, Inc. | Florida |
| Muller Design, LLC | Michigan |
| Mulligan Software | Texas |
| Mullins Consulting, Inc. | Texas |
| Multacom, Inc. | California |
| Multas Enterprises, Inc. | North Carolina |
| Multi / Cable Corporation | Connecticut |