Hicks has an estimated fortune of around £620million.
The Texan businessman owns the Dallas Stars ice hockey franchise and is set to sell the Texas Rangers baseball team.
Hicks holds a 50 per cent share in Liverpool.
“We all know about his problems with his sports clubs here in the US and over there in England,” Forbes’ senior editor Matthew Miller told the Liverpool Echo.
“He has had some debt problems. He has only just missed the cut (to be classed as a billionaire). We think he is a 900million to 950million US dollars guy.”