One final thought and its just my opinion. Because Mark exercised stock options the last time the company needed to raise money and because there does not appear to be enough time to issue a PP, it would suggest the project has evolved to the point where they can get closer to needing money and have Mark just loan money or exercise more options. This would suggest that they are no longer looking for long term financial assistance, which MAY suggest NioCorp is close to financing and won't have to keep funding the company. There is no other logical explanation why they would not need a PP.
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