| Company | Location |
|---|---|
| Cyanagen S.r.l. | Bologna, Italy |
| Cybernet Systems Corp. | Ann Arbor, Michigan, United States |
| Cycloid Co. | Cranberry Twp, Pennsylvania, United States |
| Cymbet Corp. | Elk River, Minnesota, United States |
| Cypress Foundry Solutions | Bloomington, Indiana, United States |
| Cypress Semiconductor Corp. | San Jose, California, United States |
| Cyrano Sciences | Pasadena, California, United States |
| Cyrospace Inc. | Kemah, Texas, United States |
| Cytec Industries Inc. | West Paterson, New Jersey, United States |
| CyTerra Corp. | Waltham, Massachusetts, United States |
