It's surprisingly difficult to find info about beer company market share in Canada.
If you Google "Canada beer market share", you get a lot of sources that seem to contradict Budweiser being the top beer in Canada by market share. Most sources show Labatt and Molson as the top 2 with Sleeman and Moosehead registering. There is nothing concrete though.
I came across this picture similar to the original one (spoiler for size):