| Business | Phone |
| Markus Management Corp 2793 Heathfield Rd, Bloomfield Hills 48301 | (248) 203-9090 |
| Convergent Asset Management 200 E Long Lake Rd, Bloomfield Hills 48304 | (248) 433-4000 |
| Roz Management 2769 Colonial Way, Bloomfield Hills 48304 | (248) 758-1855 |