| Business | Phone |
| Corporate Office Properties 8815 Centre Park Dr # 400, Columbia 21045 | (410) 730-9092 |
| General Growth Properties 10275 Little Patuxent Pkwy, Columbia 21044 | (410) 992-6000 |
| Humphrey Hospitality Trust Inc 7170 Riverwood Dr, Columbia 21046 | (443) 259-4900 |