Manac is a Canadian manufacturing company that concentrates its activities in the conception and manufacturing of semi-trailers. Manac is the biggest manufacturer in Canada while being one of the most important manufacturers of custom-built trailers in North America. They are the 7th biggest manufacturer of semi-trailers in North America. Manac's target market within the trucking industry is of custom-built units. Its products are sold under the brand names: Manac, CPS, Peerless, Darkwing, UltraPlate, Ultravan and Liddell Canada. The following brands give Manac a list of 125 various product offerings. The company was founded as a way of supplying Canam Steel Works (now Canam Group), a company under operation of its founder, Marcel Dutil. Its headquarters are located in Saint-Georges, Quebe