APLZ
| American President Lines Limited | 5 |
JBHZ
| J. B. Hunt Transport Incorporated | 3 |
LSFZ
| Burlington Northern and Santa Fe Railway Company | 1 |
NSFZ
| Norfolk Southern Railway Company | 18 |
NSPZ
| Norfolk Southern Railway Company | 4 |
PATZ
| Pacer Stacktrain | 1 |
TSXZ
| Transamerica Leasing Incorporated | 1 |
ZNSU
| Norfolk Southern Corporation | 2 |