| 1 | TRNX | Trinity Railcar Leasing Corp. | added 7/1979; 1/1980; eliminated 10/1991 | | NAKINA |
| 2 | TRNX | General Electric Railcar Services Corp. | added 10/1991; 1/1994; eliminated 1/2000 | | NAKINA |
| 3 | TRNX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 4 | TRNX | Trinity Railcar Leasing Corp. | added 7/79; 1/80; eliminated 10/91 | | NRHS |
| 5 | TRNX | General Electric Railcar Services Corp. | added 10/91; 1/94; eliminated 1/2000 | | NRHS |
| 6 | TRNX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 7 | TRNX | (NATX) GENERAL ELECTRIC RAILCAR SERVICES CORP. [TRINITY RAILCAR LEASING] | | | PWRC |
| 8 | TRNX | Trinity Railcar Leasing Corporation | | | RSRV |
| 9 | TRNX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |