| 1 | KCX | Kingsford Co. | added 10/1957; 10/1957-4/1961; eliminated 1/1962 | | NAKINA |
| 2 | KCX | Kingan & Co. | 1/1943-4/1947 | | NAKINA |
| 3 | KCX | Kingsford Chemical Co. | 7/1954; eliminated 10/1957 | | NAKINA |
| 4 | KCX | Kingsford Chemical Co. | eliminated 10/57 | | NRHS |
| 5 | KCX | Kingsford Co. | added 10/57; 10/57-4/61; eliminated 1/62 | | NRHS |
| 6 | KCX | *KINGAN & CO. | | | PWRC |
| 7 | KCX | *KINGSFORD CO. [KINGSFORD CHEMICAL CO.] | | | PWRC |
| 8 | KCXE | KC EXPRESS | | | SCAC4 |
| 9 | KCXI | KANSAS CONTINENTAL EXPRESS INC | | | SCAC3 |
| 10 | KCXI | KANSAS CONTINENTAL EXPRESS INC | | | SCAC4 |
