I am not so sure about that.
Bit of a conspiracy theory, but If you go back and see the large ( over a million ) trades as the price dropped in the last month. You will see that it works out to be about the 18 million mark. I have a suspicion that the transfer went through ASIC by the broker and it would also explain all the crossed trades that happened during this time as well.
Forgive me if my understanding is wrong.