You're pretty good to do your research yonuh.
I do make a point of searching/giving priority to Canadian companies for investment purposes. There's no point for me to rant about foreign corporate ownership/penetration, if I don't also support economically, growing/viable Canadian companies. After all, we are next door to a powerful economic/trading partner, the U.S.

The type of industries I have invested are: entertainment (yes, there is a Canadian firm that produces shows for export/worldwide syndication and distributes films for worldwide distribution); construction (heavy machinery), transportation (manufacture of trains, subway systems, aircraft), windmills/windpower (was inspired after I saw windmill farms in prairie provinces), aerospace. All of these firms have international operations, but head offices in Canada.

My partner has his own separate portfolio. We do discuss in general what each of us have found unsuccessful/successful.