Preußen Münster has confirmed that Niko Koulis has signed a new contract, extending his stay until 2028. Koulis announced the contract extension on Instagram while on holiday in Greece, stating he is proud to continue playing for Münster for a fifth season. Sportdirektor Jan Uphues expressed satisfaction with the agreement and highlighted Koulis' experience, mentality, and identification with the club and city.

Preußen Münster has offered Niko Koulis a new contract, though his current one expires on June 30. His agent, Felix Metzler of DLT Sports Group, confirms that Preußen Münster approached them early in the final phase of the previous season to express a desire to continue working with Niko Koulis, irrespective of the league. Metzler also states that talks and negotiations are progressing well and that Koulis can imagine staying in Münster, highlighting the importance of the club's sporting perspective and trust. Metzler adds that other clubs have also shown interest. Niko Koulis will take time during his vacation to make a considered decision and plans to announce his choice in June.