| Relationships | Role | Relationship Start | Relationship End |
| Preussag Aktiengesellschaft | Parent | 12/31/1985 | 11/30/1988 |
| C. Deilmann Ag | Parent | 12/31/1986 | 11/30/1988 |
| C. Deilmann Ag | Parent | 12/31/1985 | 12/30/1986 |
| Pecos Energy Corporation | Parent | 12/31/1985 | 12/30/1986 |
| Preussag Aktiengesellschaft | Parent | 12/31/1984 | 12/30/1985 |
| Minimax Gmbh | Parent | 10/20/1981 | 12/30/1984 |
| Preussag Energy Ventures General Partnership | Subsidary | 1/4/1984 | 12/30/1988 |
| Mississippi Delta Corporation | Subsidary | 12/31/1985 | 12/31/1986 |
| Pilottown Corporation | Subsidary | 12/31/1985 | 12/31/1986 |