First of all, what's a class? A class is a whole bunch of persons who are affected and have one thing in common.
A perfect example would be farmers. That's a class. You can have a subclass of wheat farmers, etc. If one of them is disproportionate—wheat farmers are probably a bad example—and one member of the class owns 60% or so, the others will have less, as they have the other 40%. Clearly, that person who has a 60% interest in that group of companies is disproportionate, and the screen would apply.
I can't give you a specific, generic position because it depends on who we're dealing with, what the industry is and how widely or closely it is held.