Lista de empresas
| Name | Province | City |
|---|---|---|
| CLOW Canada - Clow Canada | Nuevo Brunswick | Saint John |
| Clyde Lake Compressor Station 04-35-071-10W4 - Canadian Natural Resources Limited | Alberta | Lac la Biche |
| CMI 400 - Lahrmann Construction Inc. | Alberta | Lacombe |
| CNUL Cliffdale Facilities - Canadian Natural Upgrading Ltd | Alberta | Peace River |
| CNUL Peace River Complex - Canadian Natural Upgrading Ltd | Alberta | Peace River |
| Co-Ex-Tec Industries (North Plant) - Magna Exteriors and Interiors Corp. | Ontario | Concord |
| Co-Ex-Tec Industries (South Plant) - Magna Exteriors and Interiors Corp. | Ontario | Concord |
| Co-op Carseland Terminal - Consumers' Co-operative Refineries Limited | Alberta | Carseland |
| Co-op Refinery Complex - Consumers' Co-operative Refineries Limited | Saskatchewan | Regina |
| Coal Mountain Operations - Teck Coal Limited | Columbia Británica | Sparwood |
