The McCaskeys have been planning this since Mugs Halas death. In 1979, the Brizoiara family owned 8% of the Bears, Mugs owned 20%, Virginia McCaskey 21% and the grandchildren 43%. When Mugs died, his kids owned 28% of the team, making them the most powerful shareholder.

https://twitter.com/barstoolchicago/status/1569732543213338624

Virginia was the executor of Mugs estate since the Halas children were 11 & 13. In 1981, Virginia reorganized the Bears ownership with her father 87-year-old football player George Halas. It gave Virginia control by giving her the voting rights for the 51% of the grandkid’s stock