Not a company, and about "road legal cars" definition, isn't a Ferrari 250 GTO a road legal car? In those days gentlemen drivers use to drive their cars to the track before the challenge and back home...
If you mean that there were also normal cars for the normal transport purpose, no, because this car is named after its builder-pilot (big clue!) and the other cars named after him were all street-derived, but built for races (even if you could see them along the road!).