Industrial companies in Ontario

Colt Canada, formerly Diemaco, is a Canadian small arms manufacturer based in Kitchener, Ontario. With over 40 years of experience, the company is known as Canada's Centre of Excellence for Small Arms, supplying rifles, carbines, machine-guns, and grenade launchers to military and law enforcement clients.

General Dynamics Land Systems Canada designs, engineers, and sustains advanced tracked and wheeled combat vehicles and integrated technologies for global defense forces.

IMT Precision, located in Ingersoll, Ontario, is the advanced CNC machining division of the IMT Group. The company specializes in precision manufacturing for demanding industries such as Defence, Aerospace, and Oil & Gas. Its capabilities include CNC machining, custom forging, heat treating, and assembly, supported by integrated production facilities in Canada and the U.S.

Messer Canada is the Canadian affiliate of the Messer Group, the world's largest privately held industrial and medical gases specialist. Operating across Canada from its Ontario headquarters and regional facilities, Messer Canada produces and distributes oxygen, nitrogen, argon, carbon dioxide, hydrogen, acetylene and a wide range of high-purity specialty gas mixtures. The company serves the oil and gas, metallurgy, food and beverage, welding, healthcare, electronics and chemicals sectors via bulk deliveries, cylinder supply or on-site production units installed directly at customer sites. Recognized for its world-class safety standards, logistics reliability and expertise in complex industrial applications, Messer Canada acts as a strategic partner for operators looking to optimize their processes, energy consumption and carbon footprint through tailored industrial gas solutions — from heavy industry to specialty laboratories — at meaningful scale across the country.