RE:Acceleration of warrant expiry dateThat is a likely factor; clear the warrant - get those shares out there at $4.50... then drop the news releases they have planned.
I think it is possible they wanted the additional cash to fund the two acquisitions Peter has explicitly mentioned related to the Drosrite horizontal offering and the renewable natural gas acquisition which was in its final stages. This will continue to increase the value of PYR and its enhance its potential even further.