| 1 | CKX | Coopers Creek Chemical Co. | 7/1923; 7/1935-7/1937 | | NAKINA |
| 2 | CKX | COOPERS CREEK CHEMICAL CO. | | | PWRC |
| 3 | CKXC | COAST LINK TRANSPORTATION LLC | | | SCAC4 |
| 4 | CKXE | CLICK EXPRESS (DIV OF 4186401 | | | SCAC4 |
| 5 | CKXG | CTL | | | SCAC4 |
| 6 | CKXI | CHECKMATE TRANSPORT INC | | | SCAC4 |
| 7 | CKXN | CKC TRANSPORTATION | | | SCAC4 |
| 8 | CKXO | COOK TRANSPORT | | | SCAC4 |
| 9 | CKXP | C & K EXPRESS INC | | | SCAC3 |
| 10 | CKXT | CLARK TRANSPORT LLC | | | SCAC4 |
| 11 | CKXU | CAKEBOXX TECHNOLOGIES,LLC | | USA | BIC |
| 12 | CKXU | Cakeboxx Technologies | | | RSRV |
| 13 | CKXV | CLARK TRANSPORTATION SERVICES LLC | | | SCAC4 |
