| 1 | GPDX | General American Marks Co. | added 10/1998; 7/2000-7/2005 | | NAKINA |
| 2 | GPDX | General American Marks Co. | added 10/98; 7/2000 | | NRHS |
| 3 | GPDX | GENERAL AMERICAN MARKS COMPANY | | | PWRC |
| 4 | GPDX | General American Marks (GATX Corporation) | | | RSRV |
| 5 | GPDX | GENERAL AMERICAN MARKS COMPANY | | | SCAC4 |