The striker has recently been linked with moves to European giants Juventus and FC Bayern Munich.
The Old Lady had previously tried to sign the former Lille forward from SSC Napoli two years ago.
“There is no release clause in Osimhen’s contract. He is an extremely successful footballer who will serve Galatasaray for many years,” Ozbek told Fanatik.
“Perhaps the amount was considered high on the day we signed him, but today the prevailing view in football circles is that the transfer fee was low and the player’s value is much higher.”
Ozbek stressed that no pre-agreed fee exists that would allow clubs to trigger Osimhen’s exit.
The Nigeria international joined Galatasaray on loan in September 2024 before completing a permanent €75m move in 2025. He has scored 53 goals in 65 games and is contracted until June 2029.