Pattison Outdoor Advertising is a Canadian out-of-home advertising company owned by the Jim Pattison Group. According to the Canadian Out-of-Home Measurement Bureau, it was Canada's largest out-of-home advertising company in 2013, holding more than 55% of the national market share in horizontal posters and a 43% market share of all traditional out-of-home media. The company provides out-of-home advertising displays and serves direct retail clients and advertising agencies. It has 25 sales offices in Canada and is headquartered in Mississauga, Ontario. History In November 1967, the Jim Pattison Group entered the outdoor advertising industry with the acquisition of Seaboard Advertising. Seaboard was founded in 1908 as Bond & Ricketts Ltd. and was one of Canada's first outdoor advertising companies. The company name changed to Ruddy-Duker, and in 1936 it was sold to Neon Products. By 1946, the outdoor advertising portion of Neon Products business was a subsidiary company named Seaboard Advertising. By 1967, Jim Pattison had acquired all the shares of Neon Products/Seaboard and turned the public company into a private holding. Based in Burnaby, British Columbia, Seaboard served outdoor advertisers in British Columbia. The Seaboard name was retired in 1998 with the unification of all of Jim Pattison's outdoor advertising companies under the Pattison Outdoor Advertising name. Hook Outdoor Advertising was founded as Hook Signs in Edmonton, Alberta in 1908 and incorporated as Hook Signs Ltd. in February 1913. The company was a major supplier of store identification, display, vehicle and gold leaf signage in the early days of Edmonton. It introduced some of the first neon signs in the city 1939. In 1932, the company bought the billboards of the Ernest Willis Company in Calgary, Alberta and in 1936, the company bought the billboards of Ruddy Duker in Edmonton. Over the years, the billboard advertising business overtook the display signage business until by the 1970s Hook was predominantly an outdoor advertising company. The company expanded beyond Edmonton and Calgary and by 1985, it served cities throughout the province of Alberta. The Jim Pattison Group bought the shares of Hook Signs Ltd. in 1981 and turned the company into a private holding, Hook Outdoor Advertising. The Hook name was retired in 1998 with the unification of all of Jim Pattison's outdoor advertising companies under the Pattison Outdoor Advertising name. Gould Outdoor Advertising was founded in Midland, Ontario in 1913. The company established billboard advertising displays throughout southwestern Ontario, establishing major