| 1 | CKOA | CASINO KOA | | | SCAC3 |
| 2 | CKOC | CLARK OIL COMPANY INC | | | SCAC4 |
| 3 | CKOF | COOK OILFIELD SERVICES INC | | | SCAC3 |
| 4 | CKOK | COOK TRANSPORTATION INC | | | SCAC4 |
| 5 | CKOM | CEKOM CORPORATION | | | SCAC3 |
| 6 | CKON | CLARKSON INDUSTRIAL CONTRACTORS | | | SCAC3 |
| 7 | CKOR | CALKO TRANSPORT CO | | | SCAC3 |
| 8 | CKOR | CALKO TRANSPORT COMPANY INC | | | SCAC4 |
| 9 | CKOS | COOKS SERVICES INC | | | SCAC4 |
| 10 | CKOT | COMPLETE TRUCK LINES LLC | | | SCAC4 |
| 11 | CKOX | The Carson Carbon Co. | 7/1930-7/1932 | | NAKINA |
| 12 | CKOX | CARSON CARBON CO. | | | PWRC |
| 13 | CKOY | CORKLE OIL COMPANY LLC | | | SCAC4 |
