| Abbreviation | Definition |
|---|---|
| KAIX | Rinker Materials Corporation |
| KAMX | Kamen |
| KAMX | Kamen Incorporated |
| KAPU | Northland Seasonal Storage |
| KARX | Hamilton Elevators |
| KBSR | Kankakee Beaverville and Southern Railroad Company |
| KBSR | Kankakee, Beaverville and Southern Railroad |
| KBSZ | Kankakee Beaverville and Southern Railroad |
| KBSZ | Kankakee, Beaverville and Southern Railroad |
| KCCX | Kennecott Utah Copper Corporation |
| KCDX | Eastman Kodak |
| KCDX | Eastman Kodak Company |
| KCGX | Kaiser Cement Corporation (Southdown) |
| KCGX | Southdown Incorporated |
| KCIX | ARCO Chemical (Nova Chemicals) |
| KCIX | Nova Chemicals Incorporated |
| KCLX | Kansas City Power and Light |
| KCLX | Kansas City Power and Light Company |
| KCMO | Kansas City, Mexico & Orient |
| KCMX | Kidd Creek Mines |