| Company | Location |
|---|---|
| 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 |
| CFC Veranstaltungen GmbH | Braunschweig, Germany |
| CFD Research Corp. | Huntsville, Alabama, United States |
| CHA Industries | Fremont, California, United States |
| Chalmers University of Technology - Microtechnology Centre | Goteborg, Sweden |
