| Company | Location |
|---|---|
| Charles Stark Draper Laboratory | Cambridge, Massachusetts, United States |
| Charmilles | Lincolnshire, Illinois, United States |
| Chartered Semiconductor Manufacturing | Singapore, Singapore |
| Cheap Tubes, Inc. | Brattleboro, Vermont, United States |
| Check-It Monitoring Solutions Inc. | Regina, Saskatchewan, Canada |
| Checkpoint Systems Inc. | Thorofare, New Jersey, United States |
| Chemat Technology Inc. | Northridge, California, United States |
| Chemicals 101 Corp. | Toronto, Ontario, Canada |
| ChemImage Corp. | Pittsburgh, Pennsylvania, United States |
| Chemnitz University of Technology | Chemnitz, Germany |
