"It is the case that some shareholders have inherited shares, not all shareholders have though."
OK.
Seriously, if you want a proper reply then read my original post above. And if you can provide the details sought, you have a good chance of getting some sort of a meaningful answer.
You are not shareholders - you are part owners of a property. If I can grasp what you are trying to say.
What does internal and external mean?
People might be able to help you with options if you could clarify what the situation is.
mf