With all due respect, what do you mean people in the know? Posts like this really annoy me, the company cannot withhold pertinent 'results' or announcements under ASX listing rules. People are still buying up, because it is likely that this will be the next BHP in the long term.
They aren't buying because they know more than what has already been released. They are buying because of this (see below) and if you cant comprehend the significance of this then one should question why you are investing in junior explorers in the first place.
SIR Price at posting:
95.0¢ Sentiment: Buy Disclosure: Held