In theory, the registered owner for a given date is the person who can 'vote their shares'. In theory, this would be the person who is 'long' or the original purchaser/owner. The person holding the 'shorts' is not supposed to be able to vote those shares. Over the past few years there have been 'issues' regarding whether the rules are being followed (e.g., those in possession of the shorted shares have voted, though they should not be able to). The industry needs to figure out what they are going to do about it. In the case of Michelex, it's basically a moot point at the given time.
Bottom line, you will be able to vote the shares that are listed for you.
Hope this helps a little bit.
Sincerely,
Dino A. Sawyer
savemichelex@gmail.com