No. Shell eggs sold at grocery stores in Ontario are not pasteurized as part of the Canadian egg grading process. Eggs are washed during grading to remove dirt and contaminants from the shell, but they are not pasteurized.
A small portion of Ontario eggs may be sent for further processing and pasteurized. If eggs have been pasteurized, this will be clearly indicated on the packaging. Otherwise, shell eggs remain in their natural state after being laid by the hen, aside from the washing and grading process.