| Relationships | Role | Relationship Start | Relationship End |
| Degussa Ag | Parent | 9/30/1983 | 12/31/1989 |
| Mg Technologies Ag | Parent | 12/31/1984 | 12/30/1989 |
| Metallgesellschaft Corp. | Parent | 9/30/1983 | 12/30/1984 |
| Metallgesellschaft Corp. | Parent | 2/24/1982 | 9/29/1983 |
| Mnr Of Nevada | Subsidary | 12/31/1982 | 5/5/1986 |
| Mnr Corporation | Subsidary | 12/31/1982 | 4/15/1985 |