Gençlerbirliği Spor Kulübü (Super Lig): every transfer in and out, fees paid and earned, squad market value, €4.1m spent and €12m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Umut İslamoğlu | Genclerbirligi | Without Club | — |
| 2026-07-01 | Sékou Koïta | CSKA Moscow | Genclerbirligi | €1.6m |
| 2026-07-01 | Metehan Mimaroğlu | Genclerbirligi | Without Club | — |
| 2026-07-01 | Matej Hanousek | Genclerbirligi | Without Club | — |
| 2026-07-01 | Erhan Erentürk | Genclerbirligi | Without Club | — |
| 2026-02-10 | Ousmane Diabate | G.Birligi U19 | Genclerbirligi | — |
| 2026-01-30 | Gökhan Akkan | Genclerbirligi | Sivasspor | Loan |
| 2026-01-30 | Cihan Çanak | Trabzonspor | Genclerbirligi | Loan |
| 2025-09-17 | Léo Gaúcho | Genclerbirligi | Operário-PR | Free |
| 2025-09-12 | Tom Dele-Bashiru | Watford | Genclerbirligi | Loan |
| 2025-09-12 | Ricardo Velho | Farense | Genclerbirligi | Loan |
| 2025-09-12 | Dal Varesanovic | C. Rizespor | Genclerbirligi | Loan |
| 2025-09-10 | Kevin Csoboth | FC St. Gallen | Genclerbirligi | Loan |
| 2025-09-10 | Daniel Popa | Genclerbirligi | Without Club | — |
| 2025-09-10 | Adama Traoré | Genclerbirligi | Al-Ula | Loan |
| 2025-09-05 | Franco Tongya | Salernitana | Genclerbirligi | — |
| 2025-08-30 | M'Baye Niang | Sampdoria | Genclerbirligi | Free |
| 2025-08-19 | Sékou Koïta | CSKA Moscow | Genclerbirligi | Loan |
| 2025-08-15 | Adama Traoré | Ferencváros | Genclerbirligi | €600k |
| 2025-08-01 | Abdurrahim Dursun | Antalyaspor | Genclerbirligi | Free |