| Owner | Manager | From | Until | | Upper Lakes & St. Lawrence Transportation Company - Toronto, Ontario, Canada | | 1952/05 | 1959 |
| Upper Lakes Shipping Ltd. - Toronto, Ontario, Canada | J.D. Leitch - Toronto, Ontario, Canada | 1959/03 | 2000/03 |
| Seaway Marine Transport - St. Catharines, Ontario | ULS Corporation - Toronto, Ontario, Canada | 2000/03 | 2011/03 |
| Algoma Central Corporation - Canada | | 2011/03 | 2011/12 |
|
| Fleet | From | Until | | Upper Lakes Shipping Ltd. (ULS) - Toronto, Ontario | 1952/05 | 2000/03 |
| Seaway Marine Transport - St. Catharines, Ontario | 2000/03 | 2011/03 |
|