| 1 | INLX | Mittel Steel USA-Incoal Inc. | added 10/2007 | | NAKINA |
| 2 | INLX | Incoal Co. | added 10/1988; 1/1994-7/2005; eliminated 10/2007 | | NAKINA |
| 3 | INLX | Inland Steel Co. | eliminated 10/1988 | | NAKINA |
| 4 | INLX | Inland Steel Coal Co. | added 10/1975; 1/1980 | | NAKINA |
| 5 | INLX | Inland Steel Co. | added 7/1968; 4/1970-1/1975; eliminated 10/1975 | | NAKINA |
| 6 | INLX | Inland Steel Co. | added 7/68; 4/70-1/75 | | NRHS |
| 7 | INLX | Inland Steel Coal Co. | Jan-80 | | NRHS |
| 8 | INLX | Inland Steel Co. | eliminated 10/88 | | NRHS |
| 9 | INLX | Incoal Co. | added 10/88; 1/94-7/2000 | | NRHS |
| 10 | INLX | MITTAL STEEL USE - INCOAL INC. [INLAND STEEL COAL CO.] | | | PWRC |
| 11 | INLX | Inland Steel Coal (Incoal) | | | RSRV |
| 12 | INLX | INCOAL COMPANY | | | SCAC4 |