ATSF
| Atchison Topeka & Santa Fe | 9 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 40 |
CMHX
| CarMath Incorporated | 2 |
CSX
| CSX Railroad | 2 |
GACX
| General American Marks Company | 3 |
GNAX
| Holcim (US) Inc | 2 |
HLMX
| Helm Financial Corporation | 1 |
MP
| Missouri Pacific | 4 |
NAHX
| General Electric Rail Services | 1 |
SP
| Southern Pacific | 1 |