Financing for the deal -- which could be worth more than $20 billion and would propel Prudential to the top spot among insurers in Asia -- could include a bumper share issue, the sources said.
Prudential declined to comment.
A year ago sources familiar with the matter said that Prudential had made a preliminary offer for AIA, but its modest price fell short of the seller's expectations.
At the time, AIG had wanted between $20 billion and $40 billion for AIA, depending on the size of the stake to be sold.
(Reporting by Clara Ferreira-Marques, Editing by Kylie MacLellan)