The capital raising, comprising a A$685 million 3-for-5 rights offer and a A$115 million institutional placement, will help Star repay debt and increase liquidity, the company said on Thursday.
It had a net debt of A$1.11 billion as of end-2022.
The shares in the capital raising are being sold at A$1.20 each, 21% below Star's latest closing price of A$1.52.
Major shareholders Chow Tai Fook Enterprises and Far East Consortium (0035.HK) have taken up their rights entitlements and committed $80 million to the capital raising, Star said.
Star shares are in a trading halt Thursday while the capital raising is underway.