Billionaire Tan Sri Vincent Tan is considering selling his 30% stake in Prudential Assurance Malaysia Bhd., people with knowledge of the matter said, after already offloading a 19% holding earlier this year. 

Tan is talking to advisers about a possible divestment, the people said, asking not to be identified because the information is private. He may seek to sell at a price that values the entire business at RM20bil or more, one of the people said.