| Owner | Manager | From | Until | | Bessemer Steamship Company - Cleveland, Ohio | | 1896/11 | 1901 |
| Pittsburgh Steamship Company - Duluth, Minnesota | A.B. Wolvin | 1901 | 1936 |
| Marine Iron & Shipbuilding Co. - Duluth Minnesota | John P. Geistman | 1936 | 1937 |
| Pigeon Timber Co. - Port Arthur, Ontario | | 1937 | 1938 |
| Lakehead Transportation Co. - Port Arthur Ontario | | 1938 | 1943 |
| Great Lakes Lumber & Shipping Ltd. - Port Arthur Ontario | | 1943 | 1948 |
| Quebec & Ontario Transportation Company - Thorold, Ontario | | 1948 | 1979 |
| Marine Salvage, Ltd. - Port Colborne, Ontario | | 1979 | 1979 |
| Cayman Shipping Corporation - Georgetown, Cayman Islands | | 1979 | 1981 |
| Caribbean Sub Corporation S.A. | | 1981 | 1983 |
|
| Fleet | From | Until | | Bessemer Steamship Company - Cleveland, Ohio | 1897/04/27 | 1901 |
| Pittsburgh Steamship Company - Duluth, Minnesota | 1901 | 1936 |
| Marine Iron & Shipbuilding Co. - Duluth Minnesota | 1936 | 1937 |
| Pigeon Timber Co. - Port Arthur, Ontario | 1937 | 1938 |
| Lakehead Transportation Co. - Port Arthur Ontario | 1938 | 1943 |
| Great Lakes Lumber & Shipping Ltd. - Port Arthur Ontario | 1943 | 1948 |
| Quebec & Ontario Transportation Company - Thorold, Ontario | 1978 | 1979 |
| Cayman Shipping Corporation - Georgetown, Cayman Islands | 1979 | 1981 |
|