The 28-year-old has been in good form for the Black Sea Storm since returning from an injury which kept him out of the start of the season.
Hurmaci ran more than any other player on the field during Trabzonspor’s 3-0 victory over Galatasaray last weekend.
Trabzonspor already have a €1.5 million agreement in place with Kasimpasa and are preparing to activate the clause in January.
The former Fenerbahce midfielder was left out of Trabzonspor’s Europa League squad due to his injury.
Ozer has made two assists in three appearances for Trabzonspor this season.