| Business | Phone |
| Cabot Microelectronics Corp 500 N Commons Dr, Aurora 60504 | (630) 585-9471 |
| River Valley Coatings Inc 800 N Highland Ave, Aurora 60506 | (630) 896-8333 |
| Delta Products Group 1655 Eastwood Dr, Aurora 60506 | (630) 264-6001 |
| Oakchem 700 Sheffer Rd, Aurora 60505 | (630) 264-9957 |