| Business | Phone |
| Wightman Ward Inc 9835 Portage Rd, Portage 49002 | (269) 327-3532 |
| Alpha Design & Engineering 10341 Woodlawn Dr, Portage 49002 | (269) 329-6939 |
| Ssoe Inc 5148 Lovers Ln 100, Portage 49002 | (269) 344-2855 |
| Carl Walker Inc 5136 Lovers Ln 200, Portage 49002 | (269) 381-2222 |
| Continental Construction Co 8120 Moors Bridge Rd, Portage 49024 | (269) 323-3500 |