AOK
| Arkansas-Oklahoma Railroad | 3 |
ATSF
| Atchison Topeka & Santa Fe | 10 |
ATW
| Atlantic and Western | 5 |
BN
| Burlington Northern | 30 |
BNSF
| BNSF Railway | 38 |
CAIX
| CAI Rail Inc. | 1 |
CEFX
| CIT Group/Capital Finance, Inc | 2 |
CHTT
| Chicago Heights Terminal Transfer | 4 |
CMO
| Chicago St Paul Minneapolis & Omaha | 1 |
CNW
| Chicago & Northwestern | 4 |
CS
| Colorado & Southern | 1 |
CSX
| CSX Railroad | 6 |
DJJX
| Joseph Transportation Incorporated | 1 |
DRGW
| Denver & Rio Grande Western | 4 |
FPPX
| Fayette Power Project (Texas) | 1 |
FURX
| First Union Rail | 13 |
FXE
| Ferromex | 1 |
GACX
| General American Marks Company | 1 |
GNTX
| TTX Company | 17 |
GONX
| Railgon Company | 10 |
GSNX
| Helm Financial Corporation | 6 |
HCSX
| Helm Chesapeake LLP | 1 |
HEQX
| Helm Financial Corporation | 2 |
HIPX
| NRG Energy | 1 |
HLMX
| Helm Financial Corporation | 1 |
HPJX
| Helm-Pacific Leasing | 1 |
HROX
| HROX | 5 |
ICG
| Illinois Central Gulf | 1 |
IHB
| Indiana Harbor Belt | 1 |
KCSM
| Kansas City Southern De Mexico | 4 |
LT
| Lake Terminal Railroad Company | 1 |
LW
| Louisville and Wadley Railway Company | 2 |
MP
| Missouri Pacific | 8 |
MQRX
| MACQUARIE RAIL, INC. | 6 |
MRL
| Montana Rail Link | 10 |
MS
| Michigan Shore Railroad Incorporated | 2 |
MWAX
| Martin Marietta Materials Incorporated | 6 |
NDYX
| First Union Rail | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 2 |
NP
| Northern Pacific | 1 |
NS
| Norfolk Southern | 1 |
NYC
| New York Central | 2 |
PGEX
| Portland General Electric Company | 2 |
PRSX
| Progress Rail Service | 1 |
SBD
| Seaboard System | 1 |
SFIX
| Helm Financial Corporation | 3 |
SMIX
| Structural Metals Incorporated | 1 |
SMW
| St Marys Railway West LLC | 1 |
SP
| Southern Pacific | 1 |
SPSX
| Progress Rail Services Corp | 4 |
TCTX
| Tube City Incorporated | 1 |
TFM
| Kansas City Southern De Mexico | 3 |
TGNX
| NRG Energy | 4 |
TILX
| Trinity Industries Leasing Company | 11 |
TYOX
| The Tie Yard Of Omaha Inc. | 1 |
UP
| Union Pacific Railroad Company | 3 |
WC
| Wisconsin Central | 1 |
WE
| Wheeling & Lake Erie | 1 |