| Relationships | Role | Relationship Start | Relationship End |
| Portigon Ag | Parent | 12/31/1989 | 8/13/1993 |
| Penta Hotels Holdings Inc. | Subsidary | 12/31/1989 | 8/13/1993 |
| Penta Airport Hotels Ltd. | Subsidary | 12/31/1989 | 12/30/1990 |
| Penta Hotels Inc. | Subsidary | 12/31/1989 | 12/30/1990 |