| 1 | GPEX | General American Transportation Corp. | added 4/1970; 4/1970-1/1975; eliminated 10/1977; 1/1980-1/1994 | | NAKINA |
| 2 | GPEX | General American-Pfaudler Corp. | 7/1930-10/1966; eliminated 4/1970 | | NAKINA |
| 3 | GPEX | General American-Pfaudler Corp. | 4/38-10/66; eliminated 4/70 | | NRHS |
| 4 | GPEX | General American Transportation Corp. | added 4/70; 4/70-1/94 | | NRHS |
| 5 | GPEX | GENERAL AMERICAN TRANSPORTATION CORP [GEN. AMERICAN - PFAUDLER CO.] | | | PWRC |
| 6 | GPEX | General American Transportation Corporation (GATX Corporation) | | | RSRV |
