The Dane has been linked with several clubs recently, including Juventus, Liverpool and AC Milan.
“Simon is worth £12m at least and there are clauses in his contract to that effect,” representative Mikkel Beck told Calciomercato.
“To be honest I don’t know if he will leave Palermo in June, but he still has another four years left on his contract.
“I think Simon will stay with Palermo, but things happen fast in football and so anything can change.”