| Owner | Manager | From | Until | | Calvert Distillers Ltd. - Montreal, Quebec | Papachristidis Company - Montreal | 1963/05 | 1964 |
| Eastern Lake Carriers Ltd. - Montreal, Quebec, Canada | Papachristidis Company - Montreal | 1964 | 1972 |
| Jackes Shipping Ltd. - Toronto, Ontario, Canada | Upper Lakes Shipping Ltd. - Toronto | 1972 | 1979 |
| Upper Lakes Shipping Ltd. - Toronto, Ontario | | 1979 | 1990/03 |
| Upper Lakes Shipping Ltd. - Toronto, Ontario | Seaway Bulk Carriers - Canada | 1990/03 | 2000/03 |
| Seaway Marine Transport - St. Catharines, Ontario | | 2000/03 | 2003 |
| Distributions Grands Lacs/Ste.-Laurent - Three Rivers, Quebec | | 2003 | 2007 |
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| Fleet | From | Until | | Papachristidis Company Ltd. - Montreal, Canada | 1963 | 1972 |
| Upper Lakes Shipping Ltd. (ULS) - Toronto, Ontario | 1972 | 2000/03 |
| Seaway Marine Transport - St. Catharines, Ontario | 2000/03 | 2003 |
|