| 1 | MHRX | Mile-High Railcar Services, Inc. | added 1/1988; eliminated 1/1993; eliminated 4/1993; 1/1994-7/2005 (not listed) | | NAKINA |
| 2 | MHRX | Mile-High Railcar Leasing, Inc. | added 1/1980; 1/1980; eliminated 1/1988 | | NAKINA |
| 3 | MHRX | Mile-High Railcar Leasing, Inc. | added 1/80; 1/80; eliminated 1/88 | | NRHS |
| 4 | MHRX | Mile-High Railcar Services, Inc. | added 1/88; eliminated 1/93; eliminated 4/93; 1/94-7/2000 | | NRHS |
| 5 | MHRX | MILE-HIGH RAILCAR SERVICES, INC. | | | PWRC |
| 6 | MHRX | Mile-High Railcar Services | | | RSRV |
| 7 | MHRX | MILE-HIGH RAILCAR SERVICES, INC. | | | SCAC4 |
