Guoco Pty Ltd., the investment arm of Hong Leong Group Malaysia, on Friday upped its stake in Rank Group from 13.09 percent to 14.15 percent.
Since its September 2007 profit warning, Rank has attracted a large share of takeover speculation.
In late March, Genting Berhad, the Malaysia-based investment arm of Genting Group, denied rumors that it would make a $959 million offer for the land-based and Internet gambling operator.
Meanwhile, the Richardson family, United Kingdom-based private property investors worth an estimated $993.1 million, has also been quietly building a stake in Rank.
For purposes of reference, the Richardson family holds at least 11 percent in Rank, Genting, 11.3 percent, and Guoco, 14.15 percent.