Jerry Reinsdorf, 89, purchased a controlling stake in the White Sox in 1981, but has never publicly revealed what percentage of the team he owns.

The young private equity mogul already has major stakes in three other professional sports teams — and he's building what's thought to be the most expensive home in Illinois history.

White Sox owner Jerry Reinsdorf has the option to sell his controlling interest in the team to Justin Ishbia from 2029 to 2033.