| Relationships | Role | Relationship Start | Relationship End |
| Lake Ontario Cements Ltd. | Parent | 12/31/1987 | 12/30/1991 |
| Aetna Cement | Subsidary | 12/31/1987 | 12/30/1991 |
| Rochester Portland Cement | Subsidary | 12/31/1987 | 12/30/1991 |
| Relationships | Role | Relationship Start | Relationship End |
| Lake Ontario Cements Ltd. | Parent | 12/31/1987 | 12/30/1991 |
| Aetna Cement | Subsidary | 12/31/1987 | 12/30/1991 |
| Rochester Portland Cement | Subsidary | 12/31/1987 | 12/30/1991 |