The substantial holder is First Sentier Investors. If you look back at the recent announcements you'll see the relationship between MUFG, Colonial First State, Citibank and CBA, who are in a transitional phase of ownership/re-branding. As MUFG and CBA own more than 20% of their subsidiary, or control the interests, they are also required to lodge notice. I welcome any additional clarity here.
They have recently absorbed a significant volume of 'retail' shares which is unfortunate, given the circumstances, but I do hope those holders exited at a profit or were day trading. As we have a high percentage in retail hands, this is potentially a good thing long term.
First Sentier Investors' parent, MUFG, has a reputation for shorting, whether justified or not, but that mostly is due to the connection with a very wide investment case. Their name pops up everywhere, as you can see here by the Genex notification, so it may be a very undeserved reputation. At 7.85% in a small-cap, I certainly wouldn't be buying in to short, regardless.