PC Optimum was the top radio advertiser in Toronto for the week of March 21 to 27.

The loyalty program operated by Loblaw Companies had 941 radio spots, bumping Ontario Tourism to the second-place spot with 936 ads. Toyota Dealer Association fell to third place with 851 ads.

In Montreal, the Government of Quebec was once again the top advertiser with 408 ads, while Mazda remained the second most active radio advertiser with 395 ads.

Categorically, businesses and consumer services, cars and truck dealers, and banks had the biggest presence on Toronto radio, while wireless carriers, real estate agents, and bedding manufacturers were the most active in Montreal.