The former Channel Nine supremo - who cut his final ties with the free-to-air TV station in 2008 - snapped up the shares through his company Consolidated Press International Holdings.
The Mark Richardson owned Bel & Brio, along with its fine dining venue Corso Brio, was one of the first restaurants to anchor Sydney s flashy Barangaroo precinct in 2016.
Packer, 54, who previously struggled with mental health and weight issues, appears to be on the right track after quitting antidepressants and losing more than 30kg in the last few months
The former couple, who remain on friendly terms following their split in 2013, were seen docking their yacht at the world-famous beachfront restaurant Club 55