Athene Holding Ltd., parent company of Athene USA, has filed with the U.S. Securities and Exchange Commission for a proposed initial public offering of its Class A common shares, Retirement Income Journal reported. The number of shares to be offered and the price range for the proposed offering have not yet been determined. The IPO was announced last fall and then postponed. Renaissance Capital IPO Center estimated that Athene Holding would try to raise up to $1 billion. Athene was purchased in 2012 by Apollo Global Management, which had been managing assets for Athene before buying it. Apollo subsequently paid $2.6 billion for Aviva USA, the West Des Moines-based life insurance issuer, renaming it Athene USA and divesting its life insurance business.