| 1 | QCCX | General Electric Rail Services Corp. | added 10/2009 | | NAKINA |
| 2 | QCCX | Equistar Chemicals, LP | added 4/1998; 7/2000-7/2005; eliminated 10/2009 | | NAKINA |
| 3 | QCCX | Quantum Chemical Corp., USI Division | eliminated 4/1998 | | NAKINA |
| 4 | QCCX | Trancisco Leasing Co. | added 10/1996; eliminated 1/1997 | | NAKINA |
| 5 | QCCX | Quantum Chemical Corp. | added 1/1997 | | NAKINA |
| 6 | QCCX | Trancisco Leasing Co. | added 10/96; eliminated 1/97 | | NRHS |
| 7 | QCCX | Quantum Chemical Corp. | added 1/97 | | NRHS |
| 8 | QCCX | Quantum Chemical Corp., USI Division | eliminated 4/98 | | NRHS |
| 9 | QCCX | Equistar Chemicals, LP | added 4/98; 7/2000 | | NRHS |
| 10 | QCCX | EQUISTAR CHEMICALS LP [QUANTUM CHEMICAL CORP.] (TRANCISCO LEASING) | | | PWRC |
| 11 | QCCX | Quantum Chemical Corporation | | | RSRV |
| 12 | QCCX | EQUISTAR CHEMICALS LP | | | SCAC4 |
