Nathaniel Veltman has been found guilty of four counts of first-degree murder and one count of attempted murder involving a young boy in the June 2021 attack in London, Ontario.
The terrorism charge against Veltman will be decided later by a judge, marking the first application of terrorism charges to a far-right extremism case in Canada.
Veltman's sentencing date will be set in December and a first-degree murder conviction carries an automatic sentence of life in prison with no chance for parole for 25 years.