| Owner | Manager | From | Until | | Lake Superior Iron Company - Marquette, Michigan, USA | | 1890/04 | 1900 |
| Pittsburgh Steamship Company - Duluth, Minnesota, United States | | 1900 | 1914 |
| Atlas Steamship Company - Duluth, Minnesota, USA | R.C. Helm - USA | 1914 | 1928/02/15 |
| Eastern Terminal Elevator Company - Port Arthur, Ontario, Canada | James Richardson & Sons - Canada | 1928/02/15 | 1942 |
| Howard Hindman - Owen Sound, Ontario, Canada | | 1942 | 1943 |
| Hindman Transportation Company - Canada | George Hindman - Canada | 1943 | 1948 |
| Diamond Steamship Company - Owen Sound, Ontario, Canada | George Hindman - Canada | 1948 | 1951 |
| Reoch Steamship Company - Montreal, Quebec, Canada | | 1951 | 1961 |
|
| Fleet | From | Until | | Lake Superior Iron Company - Marquette, Michigan | 1890 | 1900 |
| Pittsburgh Steamship Company - Duluth, Minnesota | 1900 | 1914 |
| Atlas Steamship Company - Duluth, Minnisota | 1914 | 1928/02/14 |
| Eastern Terminal Elevator Company - Port Arthur, Ontario | 1928/02/14 | 1942 |
| Hindman Transportation Company Ltd. - Owen Sound, Ontario | 1943 | 1948 |
| Diamond Steamship Company | 1948 | 1951 |
| Reoch Transports Ltd. - Toronto, Ontario | 1951 | 1961 |
|