| Owner | Manager | From | Until |
| UK Minister of War Transport - England | | 1944 | 1946 |
| R. & J.H. Rea Ltd. - Bristol, England | | 1946 | 1949 |
| France, Fenwick Tyne & Wear Company - Newcastle, England | | 1949 | 1970 |
| E.R. Mellenger Company - Canada | | 1970 | 1970/11 |
| Industrial Insulators Ltd. - Canada | | 1970/11 | 1972 |
| Western Engineering Service - Thunder Bay, Ontario, Canada | | 1972 | 1986 |
| Great Lakes Marine Contracting - Port Dover, Ontario, Canada | | 1986 | 1992 |