The worry is that a large holder used the volume generated by the news to lighten up their holdings. Shouldn't be able to trade on inside information and I still don't see any downside here, just maybe some repositioning like the BlackRock reclassification, but you never know.
After the two capital raises last year, and with the other restrictions and control concerns tied up in the complex financing and holding structures, I don't that PGRX is diluting right now.