| Relationships | Role | Relationship Start | Relationship End |
| Extraco Corporation | Parent | 12/31/1980 | 12/28/1983 |
| Exporters & Traders Compress & Warehouse Company | Parent | 12/31/1970 | 12/29/1980 |
| Exporters & Traders Compress & Warehouse Company | Parent | 11/24/1970 | 12/30/1970 |