| Business | Phone |
| Affliated Investments 2750 Auburn Ct, Auburn Hills 48326 | (248) 852-5106 |
| Stegner East Investments 2685 Lapeer Rd 211, Auburn Hills 48326 | (248) 276-7577 |
| Christopher Investment Co 351 N Squirrel Rd, Auburn Hills 48326 | (248) 852-5288 |
| Greenstone Investments 2605 Greenstone Blvd, Auburn Hills 48326 | (248) 276-0800 |