| Owner | Manager | From | Until | | Port Weller Drydocks Ltd. | Upper Lakes & St. Lawrence Transportation Company | 1958/07 | 1972 |
| Upper Lakes Shipping Ltd. | | 1972 | 1986 |
|
| Fleet | From | Until | | Upper Lakes & St. Lawrence Transportation Company - Toronto, Ontario | 1958/07 | 1981/12/10 |
|