| Columbia University - Mechanical Engineering | New York, New York, United States |
| Columbia University - Microbiology | New York, New York, United States |
| Columbia University - Nanoscale Science and Engineering Center | New York, New York, United States |
| ColVisTec | Berlin - Aldershof, Germany |
| Comar Chemicals | Dassenberg, South Africa |
| CombiMatrix | Mukilteo, Washington, United States |
| ComGenex | South San Francisco, California, United States |
| Commercial Industrial Site Locators Inc. | Catonsville, Maryland, United States |
| Commonwealth Scientific and Industrial Research Organisation | Clayton South, Victoria, Australia |
| Community Redevelopment Agency of the City of Los Angeles | Los Angeles, California, United States |