| Relationships | Role | Relationship Start | Relationship End |
| Dresdner Bank Aktiengesellschaft | Parent | 12/31/1989 | 12/23/1992 |
| Heidelberger Zement Aktiengesellschaft | Subsidary | 12/31/1989 | 12/31/1990 |
| Relationships | Role | Relationship Start | Relationship End |
| Dresdner Bank Aktiengesellschaft | Parent | 12/31/1989 | 12/23/1992 |
| Heidelberger Zement Aktiengesellschaft | Subsidary | 12/31/1989 | 12/31/1990 |