| Relationships | Role | Relationship Start | Relationship End |
| Wienerberger Baustoffindustrie Ag | Parent | 12/31/1993 | 6/6/1997 |
| Wienerberger Beteiligungsverwaltungs Ag | Parent | 12/31/1993 | 6/6/1997 |
| Treibacher Schleifmettel Ag | Subsidary | 7/8/1994 | 6/6/1997 |
| Treibacher Chemische Werke Ag | Subsidary | 12/31/1993 | 12/30/1994 |