| 1 | WMI | West Michigan R.R. Co. | 7/2000-7/2005 | | NAKINA |
| 2 | WMI | West Michigan R.R. Co. | Jul-00 | | NRHS |
| 3 | WMI | WEST MICHIGAN RAILROAD CO. | | | PWRC |
| 4 | WMI | West Michigan Railroad Co | | | RSRV |
| 5 | WMI | WEST MICHIGAN RAILROAD CO | | | SCAC4 |
| 6 | WMIA | WESTPIER MARINE & INDUSTRIAL SUPPLY | | | SCAC4 |
| 7 | WMIC | WEST MICHIGAN CARTAGE INC | | | SCAC4 |
| 8 | WMIF | WASTE MANAGEMENT INC OF FLORIDA | | | SCAC4 |
| 9 | WMING | Walter Mingels Omnibusbetrieb | | D | TRAFFIC |
| 10 | WMIQ | W MARINE INC | | | SCAC4 |
| 11 | WMIX | Waste Management of Illinois, Inc. | added 10/1996; eliminated 4/2000; 7/2000-7/2005 (not listed) | | NAKINA |
| 12 | WMIX | Waste Management of Illinois, Inc. | added 10/96; eliminated 4/2000; 7/2000 | | NRHS |
| 13 | WMIX | WASTE MANAGEMENT OF ILLINOIS, INC. | | | PWRC |
| 14 | WMIX | Waste Management of Illinois | | | RSRV |
| 15 | WMIZ | WIMPEY MINERAL | | | PWRC |
