| Company | Location |
|---|---|
| Catalytica Energy Systems Inc. | Mountain View, California, United States |
| Caterpillar Inc. | Peoria, Illinois, United States |
| Caveo Technology | Newton, Massachusetts, United States |
| CB Richard Ellis | Los Angeles, California, United States |
| CBC Co., Ltd. | Chuo-ku,, Japan |
| CBI Surplus | Scotia, New York, United States |
| CD Genomics | Shirley, New York, United States |
| CDC/NIOSH | Cincinnati, Ohio, United States |
| CECON Consulting Group | Wilmington, Delaware, United States |
| CEDRAT SA | Meylan, France |
