Finance Minister Mathias Cormann said retail investors would be able to buy shares in the private health insurer for between $1.55 and $2 a share. Australia’s largest private health insurer is expected to start trading on the share market on November 25 on a conditional basis, with normal trading to begin on December 5. The government intends to sell down its entire holding in the company, which will become one of the 100 largest listed businesses on the ASX.