Hey pewart, you were right back on 19 May when you said Throvena Pty Ltd was building a stake. You obviously had some inside info on that. Today's ASX substantial holder announcement is the first time this knowledge has been made public.
The answer to your question back then, as to who is behind Throvena, is Dr Tom Wenkart? Here's a link about him....
http://www.uow.edu.au/arts/sts/bmartin/dissent/documents/health/wenkart.html