| Owner | Manager | From | Until | | Pittsburgh Steamship Company - Duluth, Minnesota | | 1942/06 | 1951/07 |
| United States Steel Corporation - USA | | 1951/07 | 1967 |
| United States Steel Great Lakes Fleet - USA | | 1967 | 1991 |
| New Management Enterprises Inc. - USA | Inland Lakes Management - Alpena, Michigan, USA | 1991 | |
|
| Fleet | From | Until | | United States Steel - Great Lakes Fleet - Duluth, Minnesota | 1951/07 | 1991 |
| Inland Lakes Management Inc. - Alpena, Michigan | 1991 | |
|