| Company | Location |
|---|---|
| Mass Clean Energy Center | Boston, Massachusetts, United States |
| Massachusetts Institute of Technology | Cambridge, Massachusetts, United States |
| Massachusetts Life Sciences Center | Woods Hole, Massachusetts, United States |
| Massachusetts Technology Collaborative | Westborough, Massachusetts, United States |
| Matches | Edmond, Oklahoma, United States |
| Materia Inc. | Pasadena, California, United States |
| Material Methods LLC | Newport Beach, California, United States |
| Materials Analytical Services | Sunnyvale, California, United States |
| Materials and Electrochemical Research Corp. | Tucson, Arizona, United States |
| Materials Modification Inc. | Fairfax, Virginia, United States |
