| Owner | Manager | From | Until | | Commonwealth Steamship Company - Cleveland, Ohio | W.A. Hawgood | 1906/04/20 | 1914 |
| Scott Steamship Company - Cleveland, Ohio | M.A. Hanna & Company | 1914 | 1918/10/18 |
| Calumet Transportation Company - Cleveland, Ohio | M.A. Hanna & Company | 1918/10/18 | 1930 |
| Producers Steamship Company | | 1930 | 1937 |
| National Steel Corporation | | 1937 | 1946 |
| Midland Steamship Lines Inc. - Cleveland, Ohio | | 1946 | 1962 |
| Comet Enterprises Ltd. - Thorold, Ontario | | 1962 | 1973 |
| Marine Salvage Ltd. - Port Colborne, Ontario | | 1973 | 1974 |
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| Fleet | From | Until | | Calumet Transportation Company - Cleveland, Ohio | | 1930 |
| Producers Steamship Company - Cleveland, Ohio | | 1937 |
| National Steel Corporation - Cleveland, Ohio | | 1946 |
| Commonwealth Steamship Company - Cleveland, Ohio | | 1949/06 |
| Midland Steamship Lines, Inc. | | 1962 |
| Comet Enterprises Ltd. - Montreal, Quebec | | 1973 |
|