| 1 | MCWC | MCWILLIAMS CONSTRUCTION LIMITED | | | SCAC4 |
| 2 | MCWE | MAC WELD MACHINING LTD | | | SCAC4 |
| 3 | MCWG | MATTHEWS, C W CONTRACTING CO INC | | | SCAC4 |
| 4 | MCWK | MILLER'S CUSTOM WORK, INC | | | SCAC1 |
| 5 | MCWM | MCWILLIAMS MOVING & STORAGE | | | SCAC4 |
| 6 | MCWN | MCW TRANSPORT (2000) INC | | | SCAC4 |
| 7 | MCWP | MCWHERTER PETROLEUM LTD | | | SCAC4 |
| 8 | MCWQ | MASTER CRAFT WINDOWS & DOORS | | | SCAC4 |
| 9 | MCWR | MCWHORTER FARMS LLC | | | SCAC4 |
| 10 | MCWS | MCW SHIPPING INC | | | SCAC4 |
| 11 | MCWU | MARINE CONTAINER TEST SERVICES LTD | | GB | BIC |
| 12 | MCWW | MOELLENBEC | | | SCAC4 |
| 13 | MCWX | Morton International, Inc. | added 7/1965; 7/1965-10/1966; eliminated 7/1969 | | NAKINA |
| 14 | MCWX | Morton Salt Co. | added 4/1962; eliminated 7/1965 | | NAKINA |
| 15 | MCWX | Morton Chemical Co. | added 4/1958; 4/1961; eliminated 4/1962 | | NAKINA |
| 16 | MCWX | Morton Chemical Co. | 4/61; eliminated 4/62 | | NRHS |
| 17 | MCWX | Morton Salt Co. | added 4/62; eliminated 7/65 | | NRHS |
| 18 | MCWX | Morton International, Inc. | added 7/65; 7/65-10/66; eliminated 7/69 | | NRHS |
| 19 | MCWX | MORTON INTERNATIONAL {MORTON SALT CO.; MORTON CHEMICAL CO.] | | | PWRC |
| 20 | MCWY | MIDNIGHT COWBOY XPRESS | | | SCAC4 |
