Grand Trunk Railway of Northern Indiana was created in 1868.
Grand Trunk Railway was created in 1852.
Grand Trunk Railway ended in 1923.
Grand Trunk Western Railway was created in 1900.
Grand Trunk Western Railway ended in 1928.
Grand Trunk Railway of Michigan ended in 1868.
Grand Trunk Railway of Michigan was created in 1867.
Grand Trunk Junction Railway was created in 1880.
Grand Trunk Junction Railway ended in 1901.
North Western Grand Trunk Railway was created in 1879.
North Western Grand Trunk Railway ended in 1880.
The historic Grand Trunk Railway no longer exists as such. However, there is a Grand Trunk Corporation, which is a holding company that owns quite a number of other companies, including the Grand Trunk Western Railroad. Please see the link.