| Relationships | Role | Relationship Start | Relationship End |
| Imerys | Parent | 12/31/1995 | 8/31/2001 |
| Timcal Sa | Subsidary | 12/31/1995 | 8/31/2001 |
| Superior Graphite Co. | Subsidary | 12/31/1995 | 5/6/1998 |
| Relationships | Role | Relationship Start | Relationship End |
| Imerys | Parent | 12/31/1995 | 8/31/2001 |
| Timcal Sa | Subsidary | 12/31/1995 | 8/31/2001 |
| Superior Graphite Co. | Subsidary | 12/31/1995 | 5/6/1998 |