DP World is expected to retain a substantial stake in the new listed entity, to be called DP Australia, the Australia Financial Review said in an unsourced report.
DP World's Australian unit was not immediately available for comment.
The planned float comes as the Queensland and the New South Wales governments separately expand their ports and have facilitated the entry of Hong Kong-controlled Hutchison Ports as a third force on top of the duopoly of DP and Asciano Ltd's .
DP World is one of the largest port operators in the world and is owned by Dubai government-linked conglomerate Dubai World, but is not included in its parent company's $26 billion debt restructuring plans.
Last month, DP World said it would seek a listing on the London Stock Exchange following disappointment with its market valuation in Dubai.