| Owner | Manager | From | Until | | Royal Canadian Navy - Ottawa, Ontario, Canada | | 1943/12 | 1945/12 |
| War Assets Corporation - Canada | Foundation Maritime Towing & Salvage Lts. - Canada | 1945/12 | 1946 |
| Marathon Corporation of Canada - Port Arthur, Ontario, Canada | | 1947 | 1967 |
| Western Engineering Services Ltd. - Canada | | 1967 | 1988 |
| Gravel & Lake Services Ltd. - Canada | | 1988 | 2015 |
| Marathon & District Historical Society - Marathon, Ontario, Canada | | 2017 | 2020 |
|
| Fleet | From | Until | | Royal Canadian Navy | 1943/12/1945 | 12 |
| Marathon Corporation of Canada Ltd. - Toronto, Ontario | 1947 | 1967 |
| Gravel & Lake Services Ltd. - Thunder Bay, Ontario | 1988 | 2015 |
|