| 1 | ALCX | Alcan Smelters and Chemicals, Ltd. | added 4/1992; 1/1994-7/2005; eliminated 10/2005; added 4/2006; eliminated 10/2009 | | NAKINA |
| 2 | ALCX | Aluminum Co. of Canada, Ltd. | 7/1932-1/1980; eliminated 5/1983; 1/1985 (not listed) | | NAKINA |
| 3 | ALCX | Aluminum Co. of Canada, Ltd. | 4/38-1/80; eliminated 5/83 | | NRHS |
| 4 | ALCX | Alcan Smelters and Chemicals, Ltd. | added 4/92; 1/94-7/2000 | | NRHS |
| 5 | ALCX | *ALLEGHENY CENTRAL SCENIC RAILROAD | | | PWRC |
| 6 | ALCX | +ALCAN SMELTERS & CHEMICAL, LTD. - CANADA {ALUMINUM COMPANY OF CANADA] | | | PWRC |
| 7 | ALCX | Alcan Smelters and Chemicals (Allegheny Creative Energy Solutions) | | | RSRV |
| 8 | ALCX | ALUMINUM COMPANY OF CANADA LTD | | | SCAC3 |
| 9 | ALCX | ALLEGHENY CREATIVE ENERGY SOLUTIONS | | | SCAC4 |
