When you say missing, is that because people have moved? If that is the case how can you disregard them? They are still shareholders, even if they are not registered.
if they arent registered then they cant vote, as such they have to be discounted. at least, this is my understanding
That does not make any sence - did RL not want 75% of the shares? if so that will have to include all shares, even those that are not registered, since they can be "reregistered".