| Company | Location |
|---|---|
| Centre Nacional de Microelectronica | Barcelona, Spain |
| Centrex Inc. | Tulsa, Ohio, United States |
| Centro de Estudios e Investigaciones Tecnicas de Gipuzkoa | San Sebastian, Spain |
| Centrum f r Angewandte Nanotechnologie (CAN) GmbH | Hamburg, Germany |
| Cenymer Corp. | Longmont, Colorado, United States |
| Cepheid Inc. | Sunnyvale, California, United States |
| CeraMem Corp. | Waltham, Massachusetts, United States |
| Ceramic Fuel Cells Limited | Noble Park, Victoria, Australia |
| Cessna Aircraft Co. | Wichita, Kansas, United States |
| CEYX Technologies Inc. | San Diego, California, United States |
