| 1 | MWKB | MWD BROKERAGE SERVICES LLC | | | SCAC4 |
| 2 | MWKC | MASTERWORK ELECTRONICS INC | | | SCAC4 |
| 3 | MWKD | MASHEW | | | SCAC4 |
| 4 | MWKI | MILWAUKIES BEST TRUCKING LLC | | | SCAC4 |
| 5 | MWKL | MIDWEST TRUCK PARTS & SUPPLIERS LLC | | | SCAC4 |
| 6 | MWKO | MCCLENDON, W K OIL COMPANY INC | | | SCAC4 |
| 7 | MWKP | M W K TRANSPORT INC | | | SCAC4 |
| 8 | MWKX | Marden-Wild Corp. | 7/1930-7/1937; 1/1941-4/1961; eliminated 10/1964 | | NAKINA |
| 9 | MWKX | Marden-Wild Corp. | 1/52-4/61 | | NRHS |
| 10 | MWKX | MARDEN-WILD CORP. | | | PWRC |
