| 1 | IBPX | Trinity Industries Leasing Co. | added 7/1995; 7/2000-7/2005 | | NAKINA |
| 2 | IBPX | IBP, Inc. | added 5/1983; 1/1994; eliminated 7/1995 | | NAKINA |
| 3 | IBPX | Merchants Despatch Transportation Corp. | added 1/1961; 4/1961-4/1970; eliminated 1/1973 | | NAKINA |
| 4 | IBPX | Merchants Despatch Transportation Corp. | 4/61-4/70; eliminated 1/73 | | NRHS |
| 5 | IBPX | IBP, Inc. | added 5/83; 1/94; eliminated 7/95 | | NRHS |
| 6 | IBPX | Trinity Industries Leasing Co. | added 7/95; 7/2000 | | NRHS |
| 7 | IBPX | *MERCHANTS DESPATCH TRANSPORTATION CORP. | | | PWRC |
| 8 | IBPX | +TRINITY INDUSTRIES LEASING COMPANY (TYSON FOODS, INC., LESSEE)[IBP, INC; IOWA BEEF PACKERS] | | | PWRC |
| 9 | IBPX | Iowa Beef Packers (Trinity Industries Leasing Co.) | | | RSRV |
| 10 | IBPX | IBP, INC. | | | SCAC4 |
