| Owner | Manager | From | Until | | McColl-Frontenac Petroleum Inc. - Canada | | 1930/05 | 1931/01 |
| S.S. Cyclo-Chief Ltd. - Canada | | 1931/01 | 1947/01 |
| S.S. Texaco Chief Ltd. - Canada | | 1947/01 | 1955/01 |
| Gayport Shipping Ltd. - Toronto, Ontario, Canada | | 1955/01 | 1959/01 |
| Hall Corporation of Canada Ltd. - Montreal, Quebec, Canada | | 1959/01 | 1970/01 |
| Witfuel Corporation - Nicaragua | West Indies Transport | 1970/01 | 1984/01 |
| Challenger Ltd. - Bermuda | | 1984/01 | 1987/01 |
|
| Fleet | From | Until | | Texaco Canada Ltd. - Toronto, Ontario | 1947/01 | 1955/01 |
| Gayport Shipping Ltd. - Toronto, Ontario | 1955/01 | 1959/01 |
| Hall Corporation of Canada - Toronto, Ontario | 1959/01 | 1970/01 |
|