| Owner | Manager | From | Until | | Great Lakes & St. Lawrence Transportation Company - Duluth, Minnesota, USA | A.B. Wolvin - USA | 1903/06 | 1905 |
| Great Lakes & St. Lawrence Transportation Company - Duluth, Minnesota, USA | D. Sullivan & Company - USA | 1905 | 1916/08/08 |
| French Government | | 1916/08/08 | 1921 |
| Glen Steamships Ltd. - Midland, Ontario, Canada | James Playfair - Canada | 1921 | 1925/02/12 |
| George Hall Coal & Shipping Company - Montreal, Quebec, Canada | | 1925/02/12 | 1926/03/10 |
| Canada Steamship Lines - Montreal, Quebec, Canada | | 1926/03/10 | 1937 |
| Manseau Shipyard, Sorel, Quebec, Canada | | 1937 | 1938 |
| Marine Industries Ltd. - Sorel, Quebec, Canada | | 1938 | 1942 |
| Branch Lines Ltd. - Sorel, Quebec, Canada | | 1942 | 1949 |
| Diamond Steamship Company - Owen Sound, Ontario, Canada | George Hindman - Canada | 1949 | 1951 |
| Reoch Steamship Company - Montreal, Quebec, Canada | | 1951 | 1956 |
| Upper Lakes & St. Lawrence Transportation Company - Toronto, Ontario, Canada | | 1956 | 1959/08 |
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