| Relationships | Role | Relationship Start | Relationship End |
| Select Taurus Holdings, Inc. | Parent | 4/28/1991 | 8/31/2001 |
| Norchem S.A. Sociedade De Investimento - Capital Estrangeiro | Parent | 2/1/1993 | 9/29/1993 |
| Norchem S.A. Sociedade De Investimento - Capital Estrangeiro | Parent | 4/1/1992 | 1/31/1993 |
| Norchem S.A. Sociedade De Investimento - Capital Estrangeiro | Parent | 12/1/1990 | 3/31/1992 |