| 1 | RAMX | Rail Merchants International | 7/2005 (not listed) | | NAKINA |
| 2 | RAMX | Rail America, Ltd. | added 7/1982; eliminated 1/1984; 1/1994 (not listed) | | NAKINA |
| 3 | RAMX | Railway Automated Machinery Co. | added 7/1967; 4/1970; eliminated 1/1971 | | NAKINA |
| 4 | RAMX | Railway Automated Machinery Co. | added 7/67; 4/70; eliminated 1/71 | | NRHS |
| 5 | RAMX | Rail America, Ltd. | added 7/82; 1/94 | | NRHS |
| 6 | RAMX | *RAILWAY AUTOMATED MACHINERY CO. | | | PWRC |
| 7 | RAMX | +RAIL MERCHANTS INTERNATIONAL [RAILAMERICA, LTD.] | | | PWRC |
| 8 | RAMX | Rail America (Genessee & Wyoming) | | | RSRV |
| 9 | RAMX | RAIL MERCHANTS INTERNATIONAL | | | SCAC4 |
