Ann: Becoming a substantial holder, page-124

If she is potentially wanting to take control, why wouldn't she at a minimum keep her powder dry for the next drill results so the position is clearer?
So far she just has an interest which is safe and no compulsion to launch a compulsory T/O.
A big SP run seems unlikely as the retail investors are confused and mostly scared off.
Some third party gaining a foothold seems more likely IMO.
Ellison MinRes seems possible as others have suggested. Only the brokers will know.