Just Retirement said the offering would also include the sale of shares by its principal shareholder Avallux S.A., which is wholly owned by buyout firm Permira, and members of its management team.
Rodney Cook, chief executive of Just Retirement, said: "This IPO enables Just Retirement to capitalise on the expected continued strong growth in new business, strengthens our regulatory and economic capital ratios and better positions us to accommodate future regulatory changes."