| Campus Micro Technologies GmbH | Bremen, France |
| CamScan USA Inc. | Cranberry Township, Pennsylvania, United States |
| CAN GmbH | Hamburg, Germany |
| Canada | Boston, Massachusetts, United States |
| Canadian Consulate General | Los Angeles, California, United States |
| Canadian Microelectronics Corp | Kingston, Ontario, Canada |
| Canadian NanoBusiness Alliance | Montreal, Quebec, Canada |
| CANEUS Inc. | Montreal, Quebec, Canada |
| CANMET Materials Technology Laboratory | Ottawa, Ontario, Canada |
| Canton Municipal Utilities | Canton, Mississippi, United States |