| Fleet | From | Until |
| Great Lakes & St. Lawrence Transportation Co. - Duluth, Minnesota | | 1916 |
| Glen Steamships Ltd. - Midland, Ontario | | 1925 |
| George Hall Coal & Shipping Corporation - Montreal, Quebec | | 1926 |
| Manseau Shipyard - Sorel, Quebec | | 1938 |
| Marine Industries Ltd. - Sorel, Quebec | | 1942 |
| Branch Lines Ltd. - Sorel, Quebec | | 1951 |
| Yankcanuck Steamships Ltd. - Sault Ste. Marie, Ontario | | 1970 |
| Canada Steamship Lines - Canada | 2002/12 | |