| Company | CBEM HOLDING COMPANY, LLC |
| Business Number | 4899476 |
| Company | TRUE NORTH HEALTH SERVICES COMPANY, LLC |
| Business Number | 4818301 |
| Company | TRUE NORTH HEALTH SOLUTIONS, LLC |
| Business Number | 4538712 |
| Company | TRUE NORTH GPO SOLUTIONS, LLC |
| Business Number | 4538715 |
| Company | NORTH SHORE-LIJ RENAL VENTURES, LLC |
| Business Number | 4471161 |
| Company | QBC HOLDINGS, LLC |
| Business Number | 2574105 |