| company | role | hq | verified |
|---|
| Steiner Electric – St. Charles | DIST | St. Charles, IL (US) | 1 mfrs |
| Steiner Electric – Tinley Park | DIST | Tinley Park, IL (US) | 1 mfrs |
| Thayer Lighting | DIST | Loves Park, IL (US) | 1 mfrs |
| Wesco – Communication Supply Corp | DIST | Carol Stream, IL (US) | 1 mfrs |
| ADDISON BUILDING MATERIAL | DIST | Arlington Heights, IL (US) | 1 mfrs |
| A & D ELECTRIC SUPPLY | DIST | Litchfield, IL (US) | 1 mfrs |
| AMPERAGE ELECTRICAL SPLY | DIST | Roselle, IL (US) | 1 mfrs |
| A-SPECIAL ELECT SERVICE | DIST | Wood Dale, IL (US) | 1 mfrs |
| BRIGHT ELECTRICAL SUPPLY | DIST | Chicago, IL (US) | 1 mfrs |
| CENTRAL AUDIO VISUAL EQUIPMENT | DIST | Streamwood, IL (US) | 1 mfrs |
| COMPLETE | DIST | Peru, IL (US) | 1 mfrs |
| CRESCENT ELECT | DIST | Princeton, IL (US) | 1 mfrs |
| ENGLEWOOD ELEC SPLY | DIST | Rockford, IL (US) | 1 mfrs |
| FIND | DIST | Lincolnshire, IL (US) | 1 mfrs |
| GALESBURG ELECTRIC | DIST | Galesburg, IL (US) | 1 mfrs |
| GOODMAN ELECTRIC SPLY | DIST | North Chicago, IL (US) | 1 mfrs |
| HELSEL-JEPPERSON ELEC | DIST | Chicago Heights, IL (US) | 1 mfrs |
| IDLEWOOD ELECTRIC SUPPLY | DIST | Highland Park, IL (US) | 1 mfrs |
| INDUSTRIAL ELEC SPLY | DIST | Burr Ridge, IL (US) | 1 mfrs |
| JCB PRODUCTS | DIST | Normal, IL (US) | 1 mfrs |