| Owner | Manager | From | Until | | Eastern Steamship Company - Port Colborne, Ontario, Canada | Boland & Cornelius | 1925/04 | 1936/01 |
| Upper Lakes & St. Lawrence Transportation Company - Toronto, Ontario, Canada | John D. Leitch - Toronto, Ontario, Canada | 1936/01 | 1959/10 |
| Saint John Drydock Company - Saint John, New Brunswick, Canada | | 1959/10 | 1961 |
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| Fleet | From | Until | | Upper Lakes & St. Lawrence Transportation Company - Toronto, Ontario | 1936/01 | 1959/10 |
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