| 1 | HSCX | Steel Wheels Ltd. | added 7/1984; eliminated 7/1993; 1/1994-7/2005 (not listed) | | NAKINA |
| 2 | HSCX | Hammond Standish & Co. | 7/1930-4/1938 | | NAKINA |
| 3 | HSCX | Hammond Standish & Co. | Apr-38 | | NRHS |
| 4 | HSCX | Steel Wheels Ltd. | added 7/84; eliminated 7/93; 1/94-7/2000 | | NRHS |
| 5 | HSCX | *HAMMOND STANDISH & CO. | | | PWRC |
| 6 | HSCX | *HORRY COUNTY RAILROAD - SOUTH CAROLINA | | | PWRC |
| 7 | HSCX | +STEEL WHEELS LTD | | | PWRC |
| 8 | HSCX | Hammond Standish (Steel Wheels) | | | RSRV |
| 9 | HSCX | STEEL WHEELS LIMITED | | | SCAC4 |
