Surely someone is soaking, page-8

Could it be something to do with John Ho's derivative holdings, maybe whoever is covered him is buying to reduce their risk.

"Mr. John Ho is the Founder and Chief Investment Officer of Janchor Partners, a long-term industrialist investor based in Hong Kong and currently holds indirectly, (through Janchor Partners), a 17.9% interest in Vocus (constituted by a relevant interest of 9.24% of Vocus’ voting shares and an economic interest through cash settled equity derivatives in a further 8.66%)"

https://www.vocusgroup.com.au/about-us/our-board