| Owner | Manager | From | Until | | John Shaw Transit Company - Port Huron, Michigan, USA | | 1901/04 | 1901/08 |
| Eddy Shaw Transit Company - USA | | 1901/08 | 1901/12 |
| Donora Mining Company - Duluth, Minnesota, USA | Pittsburgh Steamship Company | 1901/12 | 1904/04 |
| Pittsburgh Steamship Company - Duluth, Minnesota, United States | | 1904/04 | 1940/03 |
| Upper Lakes & St. Lawrence Transportation Company - Toronto, Ontario, Canada | | 1940/03 | 1959/03 |
| Upper Lakes Shipping Ltd. - Toronto, Ontario, Canada | J.D. Leitch - Toronto, Ontario, Canada | 1959/03 | 1969 |
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| Fleet | From | Until | | Pittsburgh Steamship Company - Duluth, Minnesota | 1904/04 | 1940/03 |
| Upper Lakes & St. Lawrence Transportation Company - Toronto, Ontario | 1940/03 | 1959/03 |
| Upper Lakes Shipping Ltd. (ULS) - Toronto, Ontario | 1959/03 | 1969 |
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