| Maryland Computer Service, Inc. | Maryland |
| Maryland Designs, LLC | Maryland |
| Maryland Institute of College of Art | Maryland |
| Maryland Israel Development Center | |
| Maryland Tech Council | Maryland |
| Maryland University of Integrative Health | Maryland |
| Maryland Web Designers | Maryland |
| Marymount California University | California |
| Marymount Manhattan College | New York |
| Marymount University | Virginia |
| Maryville College | Tennessee |
| Maryville University | Missouri |
| Marywood University | Pennsylvania |
| MarZ Consulting, Inc. | Pennsylvania |
| MAS Direct Network | Texas |
| MAS Global | |
| MAS Solutions, LLC | California |
| Masadah, LLC | South Carolina |
| MASC Data Systems of Orlando | Florida |
| Masergy Communications, Inc. | Texas |
| Mashable | New York |
| Mashbox, LLC | |
| Mashek Systems | Tennessee |
| Mashvisor | California |
| Masimo | California |
| Maslo | California |
| Mason | Washington |
| Mason | |
| Mason Associates, Inc. | Maine |
| Mason Computer Consulting, Inc. | Maryland |
| Mason, Inc. | Connecticut |
| Masonry Interactive, LLC | |
| Maspeth Federal Savings | |
| Mass Appeal Media, Inc. | |
| Mass Enthusiasm | Arkansas |
| MASS Group, Inc. | California |
| Mass Media Games | California |
| Mass PC Services, Inc. | Massachusetts |
| Mass Technology Leadership Council | Massachusetts |
| Massachusetts Capital Resource Company | Massachusetts |
| Massachusetts Clean Energy Center | Massachusetts |
| Massachusetts College of Liberal Arts | Massachusetts |
| Massachusetts Innovation & Technology Exchange | Massachusetts |
| Massachusetts Institute of Technology | Massachusetts |
| Massachusetts Institute of Technology Bootcamps | Massachusetts |
| Massachusetts Institute of Technology Center for Brain, Minds, & Machines | Massachusetts |
| Massachusetts Institute of Technology Computer Science and Artificial Intelligence Laboratory | Massachusetts |
| Massachusetts Institute of Technology CSAIL Computer Systems Security Group | Massachusetts |
| Massachusetts Institute of Technology CSAIL Parallel & Distributed Operating Systems Group | Massachusetts |
| Massachusetts Institute of Technology Department of Biological Engineering | Massachusetts |