| Company | Location |
|---|---|
| Christmann GmbH | Birkenfeld, Germany |
| Ciba Specialty Chemicals North America | Tarrytown, New York, United States |
| CiDRA Precision Services | Wallingford, Connecticut, United States |
| CIENA Corp. | Linthicum, Maryland, United States |
| CILAS | ORLEANS, France |
| Cima NanoTech Inc. | Woodbury, Minnesota, United States |
| Cimex Biotech LC | Covington, Louisiana, United States |
| CiS Institut fuer Mikrosensorik GmbH | Erfurt, Germany |
| City of San Jose - Office of Economic Development | San Jose, California, United States |
| City University of Hong Kong - Center of Super-Diamond and Advanced Films | Kowloon, Hong Kong, China |
