| Relationships | Role | Relationship Start | Relationship End |
| Imerys | Parent | 7/31/2000 | 8/31/2001 |
| Wienerberger Ziegelindustrie Ag | Parent | 7/8/1994 | 6/6/1997 |
| Treibacher Scheifmittel Gmbh | Subsidary | 7/31/2000 | 8/31/2001 |
| Treibacher Schleifmettel Spa | Subsidary | 7/8/1994 | 6/6/1997 |