| Company | Location |
|---|---|
| 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 |
| Claflin Assoc. Inc. | Leominster , Massachusetts, United States |
| Clal Industries and Investments | Tel Aviv, Israel |
| Clark-MXR Inc. | Dexter, Michigan, United States |
