Fenerbahçe, Galatasaray, Trabzonspor, and Beşiktaş all spent big this summer as Turkish clubs continued to punch above their usual weight in the European market. Below are the ten biggest confirmed Süper Lig transfers of summer 2026, ranked by the fixed fee disclosed in official filings and counting down to the biggest deal of the window.

10. Nathan Aké: Manchester City to Fenerbahçe

Fenerbahçe added Dutch international defender Nathan Aké from the Premier League. The fee is reported at €8.2 million plus €1.75 million in add-ons. Aké made 32 appearances for City last season and arrives with a trophy cabinet including a Champions League title and six Premier League crowns.

9. Deniz Gül: Porto to Galatasaray

Galatasaray completed the signing of Turkish-German talent Deniz Gül from Porto. The official CMVM filing confirms a fee of 10 million euros, with Porto retaining a 10% sell-on clause. Gül has signed a five-year contract with a guaranteed annual salary of €1.5 million.

8. Kojo Peprah Oppong: OGC Nice to Fenerbahçe

Fenerbahçe moved fast to sign Ghanaian defender Kojo Peprah Oppong after just one season at Nice. The deal is worth 12 million euros, with Nice keeping a 10% sell-on clause. Oppong made 43 appearances for Nice last season after joining from Swedish side Norrköping for around €2.7m. He has signed a four-year contract in Istanbul.

7. Aral Şimşir: Midtjylland to Trabzonspor

Trabzonspor broke their own transfer record to sign Turkish international winger Aral Şimşir from Danish club Midtjylland. The KAP filing confirms a fee of 13 million euros, paid in seven instalments. Şimşir registered 12 goals and 21 assists in 52 official matches last season. He has signed a four-year contract worth €2 million per season.

6. Vedat Muriqi: Mallorca to Fenerbahçe

Fenerbahçe brought back Kosovan striker Vedat Muriqi, six years after selling him to Lazio in 2020. The deal is worth between €15 million and €15.5 million, well below Mallorca's initial €30m asking price. Muriqi scored 23 La Liga goals last season, finishing second behind only Kylian Mbappé. He has signed a contract running through 2029.

5. Franculino Dju: Midtjylland to Trabzonspor

Trabzonspor doubled down on the Danish market, signing Guinea-Bissau striker Franculino Dju from Midtjylland. The club's official KAP disclosure states a fee of 17 million euros paid across eight instalments, though several reports suggest the real total package is closer to €25-30m once bonuses and the Turkish federation's reporting rules are factored in. Franculino scored 58 goals in 117 appearances for Midtjylland. He has signed a four-plus-one-year contract.

4. Leandro Trossard: Arsenal to Beşiktaş

Beşiktaş secured Belgian international winger Leandro Trossard from Premier League champions Arsenal. The official KAP statement confirms a fee of 18 million euros, paid in six instalments over three years. Trossard has signed a three-plus-one-year deal worth a guaranteed €6.5 million per season. He won the Premier League and FA Cup during his time at Arsenal.

3. Aleksey Batrakov: Lokomotiv Moscow to Galatasaray

Galatasaray landed highly-rated Russian playmAkér Aleksey Batrakov from Lokomotiv Moscow. The official disclosure confirms a fee of 25 million euros, with Lokomotiv retaining a 15% sell-on clause. Batrakov has signed a five-year contract worth a guaranteed €3.25 million per season. The move represents one of the biggest Russian transfers to Turkey in years.

2. Rafael Leão: AC Milan to Galatasaray

Galatasaray pulled off a coup by signing former Serie A MVP Rafael Leão from AC Milan, beating out Aston Villa in the final stages. The fixed fee is confirmed at 38 million euros, excluding bonuses, with Milan holding a 20% sell-on clause. Leão made 291 appearances for Milan across seven seasons, winning a Serie A title and reaching a Champions League semi-final. He has signed a four-year contract worth €10 million net per season.

1. Mason Greenwood: Marseille to Fenerbahçe

Fenerbahçe landed the biggest transfer of the Turkish summer, signing English forward Mason Greenwood from Marseille after beating out Atlético Madrid. The confirmed fee is 39 million euros, paid in three equal instalments over three years. Greenwood scored 37 goals in 66 Ligue 1 appearances across two seasons at Marseille, including 21 in his best campaign. He has signed a four-year contract in Istanbul.