ADMX
| ADM Transportation Company | 2 |
DOWX
| Dow Chemical Company | 1 |
GATX
| General American Marks Company | 3 |
HOKX
| Occidental Chemical Corporation | 1 |
NATX
| General Electric Rail Services | 1 |
PROX
| Procor Limited | 2 |
UPP
| Union Pacific Passenger | 1 |
UTLX
| Union Tank Car Company | 1 |