| Owner | Manager | From | Until | | Industrial Acceptance Corporation Ltd. - Canada | | 1965/06 | 1968/01 |
| Hall Corporation of Canada - Canada | | 1968/01 | 1969/01 |
| Hall Corporation (Shipping) 1969 Ltd. - Canada | | 1969/01 | 1980/01 |
| Halco Inc. - Canada | | 1980/01 | 1987/01 |
| Misener Transportation Ltd. - St. Catharines, Ontario, Canada | | 1987/01 | 1991/01 |
| Misener Shipping Ltd. - Canada | Great Lakes Bulk Carriers - Canada | 1991/01 | 1994/04 |
| Upper Lakes Shipping Ltd. - Toronto, Ontario, Canada | Seaway Bulk Carriers - Canada | 1994/04 | 2000/01 |
| Upper Lakes Shipping Ltd. - Toronto, Ontario, Canada | Seaway Marine Transport - Canada | 2000/01 | 2005/01 |
|
| Fleet | From | Until | | Hall Corporation of Canada - Toronto, Ontario | 1965/06 | 1987/01 |
| Misener Transportation Ltd - St. Catharines, Ontario | 1987/01 | 1994/04 |
| Upper Lakes Shipping Ltd. (ULS) - Toronto, Ontario | 1994/04 | 2005/01 |
|