Another strategy is to merge with or acquire another company that would be already listed.  By doing this, PTSC could form an entirely new company with Nas listing, or could convert PTSC shares to the already listed Nas Company shares in an appropriate ratio.  I don't know how likely either scenario is, but point it out only to show there are a number of other ways to reduce the O/S (and thereby inversely affect the share price) and or to qualify for listing on the Nas.