| 1 | WEM | Gesellschaft zur Betreibung der Waldeisenbahn Muskau mbH | Bad Muskau | D | privat-bahn.de |
| 2 | WEM | Waldeisenbahn Muskau e.V. | | D | TRAFFIC |
| 3 | WEMC | WEST ESSEX MANAGEMENT CORP | | | SCAC4 |
| 4 | WEMEG | Westmecklenburgische Eisenbahn-GmbH | Bantin | D | privat-bahn.de |
| 5 | WEMEG | Westmecklenburgische Eisenbahngesellschaft mbH | | DE | VKM |
| 6 | WEMG | WESTGATE MOVING COMPANY INC | | | SCAC4 |
| 7 | WEMI | WESTERN EMULSIONS INC | | | SCAC4 |
| 8 | WEMX | Westinghouse Electric & Manufacturing Co. | 8/1920-1/1945 | | NAKINA |
| 9 | WEMX | Westinghouse Electric Corp. | 1/1946-1/1950 | | NAKINA |
| 10 | WEMX | Westinghouse Electric & Manufacturing Co. | Apr-38 | | NRHS |
| 11 | WEMX | *WESTINGHOUSE ELECTRIC CORP. | | | PWRC |
| 12 | WEMX | +WESTERN MILLING, LLC | | | PWRC |
| 13 | WEMX | WESTERN MILLING LLC | | | SCAC4 |
