BNSF
| BNSF Railway | 18 |
CLSX
| Cargill Incorporated Salt Division | 3 |
CMHX
| CarMath Incorporated | 7 |
CP
| Canadian Pacific Railway | 4 |
CSX
| CSX Railroad | 5 |
MP
| Missouri Pacific | 1 |
NAHX
| General Electric Rail Services | 1 |
NS
| Norfolk Southern | 1 |
PLCX
| General Electric Rail Services | 1 |
RFMX
| Caldwell-Baker Company | 3 |