Altay SK (Süper Lig): every transfer in and out, fees paid and earned, squad market value, €2.5m spent and €6.2m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2025-09-08 | Player | Altay SK | İçelspor | Free |
| 2025-08-28 | Player | Altay SK | İçelspor | Free |
| 2025-07-24 | Player | Altay SK | Çankayaspor | Free |
| 2025-07-18 | Player | Altay SK | 68 Aksaray Belediyespor | Free |
| 2025-07-17 | Player | Altay SK | Balıkesirspor | Free |
| 2025-07-03 | Player | Altay SK | Alanyaspor | Free |
| 2025-02-11 | Player | Altay SK | Söke 1970 | Free |
| 2025-02-10 | Player | Altay SK | Corum FK | Free |
| 2024-09-12 | Player | Altay SK | Nazilli Belediyespor | Loan |
| 2024-08-13 | Salih Sarıkaya | Altay SK | Erzurumspor FK | Free |
| 2024-08-13 | Player | Altay SK | Orduspor 1967 | Free |
| 2024-07-23 | Player | Altay SK | Etimesgut Belediyespor | Free |
| 2024-07-02 | Eren Erdoğan | Altay SK | Gaziantep FK | Free |
| 2024-07-01 | Enes Öğrüce | Altay SK | Bodrum FK | — |
| 2024-07-01 | Player | Altay SK | Free | |
| 2024-07-01 | Player | Altay SK | Kahramanmaraş İstiklalsp | Free |
| 2024-02-01 | Player | Altay SK | Talasgücü Belediyespor | Free |
| 2024-01-31 | Efe Sarikaya | Altay SK | Grenoble | €200k |
| 2024-01-27 | Player | Altay SK | Bucaspor 1928 | Free |
| 2024-01-26 | Player | Altay SK | Free |