I would postpone calling in your certificates until after the AMEX listing otherwise you may have a bunch of paperwork to convert them to the new exchange. Once you're on AMEX though there won't be a need to have the certificates in your own hands b/c they can't naked short. It would only make sense to have gotten your certificates a long time ago for example when it was a penny stock and if it was being held down by the market makers thus keeping the price below the approval level. We don't have the problem today and I think trying to get your certs at this point would be a big headache. Don't get me wrong, I want the shorts to fry as much as anyone. Just my opinion and I'm not positive on the process of the new listing.