Celtic Front Office
Gutman turned down a homegrown contract with the Chicago Fire to join Celtic.
The 18-year-old Weah joins Celtic from PSG.
West Brom signed Burke for $20 million from RB Leipzig.
Timothy Weah is the son of George Weah, who won the Ballon d'Or in 1995.
Dembele made his U-20 debut for Celtic at the age of 13-years-old.