BNSF
| BNSF Railway | 3 |
CLSX
| Cargill Incorporated Salt Division | 1 |
CMO
| Chicago St Paul Minneapolis & Omaha | 1 |
CNLX
| CN Treasury Operations, Limited | 1 |
CNW
| Chicago & Northwestern | 2 |
CRDX
| Chicago Freight Car Leasing Company | 2 |
CSX
| CSX Railroad | 1 |
GACX
| General American Marks Company | 3 |
HWCX
| Halliburton Company | 1 |
MKT
| Missouri-Kansas-Texas | 1 |
NAHX
| General Electric Rail Services | 1 |
RGCX
| Rio Grande Chemical LTD | 1 |
TILX
| Trinity Industries Leasing Company | 2 |
UP
| Union Pacific Railroad Company | 3 |
WW
| Winchester & Western | 1 |
WWUX
| Unimin Corporation | 8 |