ACFX
| General Electric Rail Services | 3 |
AEQX
| ATEL Equipment Corporation | 1 |
AEX
| Andersons | 1 |
AOK
| Arkansas-Oklahoma Railroad | 2 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
BNSF
| BNSF Railway | 2 |
CHTT
| Chicago Heights Terminal Transfer | 1 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 2 |
DSIX
| Dowell Schlumberger Incorporated | 7 |
GNAX
| Holcim (US) Inc | 1 |
ITFX
| INFINITY TRANSPORTATION III LLC | 1 |
KCS
| Kansas City Southern | 3 |
MP
| Missouri Pacific | 2 |
NOKL
| Northwestern Oklahoma | 1 |
NW
| Norfolk & Western | 1 |
PPGX
| PPG Industries Incorporated | 2 |
TFM
| Kansas City Southern De Mexico | 1 |
UP
| Union Pacific Railroad Company | 2 |