Is there a price that PNP needs PTK to sustain to remain compliant? IS it possible that someone is trying to put the boots to Sheldon for some reason?

This is an excellent question and the fact that SI can be hobbled by so many avenues (by shorting any of his smorgasboard of holdings even more) is probably well known by two classes of people: those that have an agenda against HIM and those that have an accumulation agenda for POET shares that can be accomplished by putting SI in more pain through shorting any stocks of his. He is probably drifting along on the edge of compliance/non-compliance with this covenant and any time a determined entity wishes to dislodge more POET from his hands, it can easily be done.