| 1 | WMCD | WEST MICHIGAN CONSOLIDATORS | | | SCAC4 |
| 2 | WMCI | WEST MICHIGAN TRANSPORT LLC | | | SCAC4 |
| 3 | WMCL | WHITELAW MACHINERY COMPANY LIMITED | | | SCAC4 |
| 4 | WMCM | WIMCO METALS INC | | | SCAC4 |
| 5 | WMCO | WINGHAM COLONY FARMS | | | SCAC4 |
| 6 | WMCP | WILMAC ENTERPRISES LLC | | | SCAC4 |
| 7 | WMCQ | WHITEWATER MARINE CORP | | | SCAC4 |
| 8 | WMCR | WATKINS MANUFACTURING CORP | | | SCAC4 |
| 9 | WMCS | WINDMILL CABINET SHOP LTD | | | SCAC4 |
| 10 | WMCW | WOOIL MARINE CO LTD | | | SCAC4 |
| 11 | WMCX | The Westinghouse Machine Co. | 8/1920 | | NAKINA |
| 12 | WMCX | The Westinghouse Machine Co. (Westinghouse Electric & Manufacturing Co.—Machine Works) | 7/1923 | | NAKINA |
| 13 | WMCX | L.H. Wentz (Oil Division) | 7/1935 | | NAKINA |
| 14 | WMCX | Williams Molasses Co. | 4/1947-1/1950 | | NAKINA |
| 15 | WMCX | *WESTINGHOUSE ELECTRIC & MFG. CO, MACHINE WORKS [WESTINGHOUSE MACHINE CO.] | | | PWRC |
| 16 | WMCX | *WILLIAMS MOLASSES CO. | | | PWRC |
| 17 | WMCX | Westmoreland Coal Company | | USA | TRAFFIC |
| 18 | WMCY | WOEBER MUSTARD COMPANY | | | SCAC4 |
| 19 | WMCZ | WESTMORELAND COAL COMPANY | | | PWRC |
