| Business | Phone |
| Aisan Industries 425 N Martingale Rd 1180, Schaumburg 60173 | (847) 706-3778 |
| Geelong Usa 107 Commerce Dr, Schaumburg 60173 | (847) 885-0244 |
| Foster Electric Usa Inc 1000 E State Pkwy G, Schaumburg 60173 | (847) 310-8200 |
| Etel Inc 333 E State Pkwy, Schaumburg 60173 | (847) 519-3380 |
| Cecol Inc 951 N Plum Grove Rd D, Schaumburg 60173 | (847) 619-6700 |
| Collins International 2500 W Higgins Rd 1015, Schaumburg 60194 | (847) 839-8034 |