okay, in relation to these rankings & this thread, how about this:
Toyota is sold & marketed as it’s own brand.
So is Scion.
So is Lexus.
So is Chevrolet.
So is Pontiac, Olds, GMC, etc etc.
The top brand rankings are relative to brands, not companies.
So, the Toyota brand (vehicles with Toyota nameplates, not Lexus, Scion, etc) is #2 behind the Chevrolet brand (vehicles with Bowties on them).