| 1 | WEMX | Westinghouse Electric & Manufacturing Co. | 8/1920-1/1945 | | NAKINA |
| 2 | WEMX | Westinghouse Electric Corp. | 1/1946-1/1950 | | NAKINA |
| 3 | WEMX | Westinghouse Electric & Manufacturing Co. | Apr-38 | | NRHS |
| 4 | WEMX | *WESTINGHOUSE ELECTRIC CORP. | | | PWRC |
| 5 | WEMX | +WESTERN MILLING, LLC | | | PWRC |
| 6 | WEMX | WESTERN MILLING LLC | | | SCAC4 |