Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 26.02.2026 | D. Ceylan | Kocaelispor | Kocaelispor | - |
| 31.01.2026 | E. Bilim | Kocaelispor | — | Loan |
| 27.01.2026 | O. Syrota | Kocaelispor | Dynamo Kyiv | Return from loan |
| 01.01.2026 | T. Serbest | Kocaelispor | — | Free agent |
| 30.12.2025 | T. Serbest | Kocaelispor | — | Free agent |
| 25.11.2025 | B. Dalkilic | Kocaelispor | — | - |
| 24.11.2025 | B. Dalkilic | Kocaelispor | — | - |
| 01.11.2025 | E. Lawal | Kocaelispor | — | Free agent |
| 01.11.2025 | Toheeb Lawal | Kocaelispor | — | Free agent |
| 11.09.2025 | Ryan Mendes | Kocaelispor | — | Transfer |
| 10.09.2025 | C. Çelik | Kocaelispor | — | Free Transfer |
| 10.09.2025 | Ryan Mendes | Kocaelispor | — | Transfer |
| 09.09.2025 | M. Caktaš | Kocaelispor | — | Free agent |
| 09.09.2025 | A. Appindangoyé | Kocaelispor | — | Free Transfer |
| 09.09.2025 | Ryan Mendes | Kocaelispor | — | Transfer |
| 09.09.2025 | C. Çelik | Kocaelispor | — | Free agent |
| 08.09.2025 | C. Çelik | Kocaelispor | — | Free agent |
| 08.09.2025 | A. Appindangoyé | Kocaelispor | — | Free agent |
| 07.09.2025 | A. Appindangoyé | Kocaelispor | — | Free agent |
| 05.09.2025 | M. Tunalı | Kocaelispor | — | Loan |
| 04.09.2025 | M. Tunalı | Kocaelispor | — | Loan |
| 02.09.2025 | A. Göcen | Kocaelispor | — | Free Transfer |
| 31.08.2025 | O. Çağlayan | Kocaelispor | — | Transfer |
| 30.08.2025 | O. Çağlayan | Kocaelispor | — | Transfer |
| 29.08.2025 | O. Oztonga | Kocaelispor | — | Loan |
| 28.08.2025 | Ü. Ekşi | Kocaelispor | — | Free Transfer |
| 26.08.2025 | U. Eksi | Kocaelispor | — | Free agent |
| 26.08.2025 | J. Vuković | Kocaelispor | — | Free agent |
| 26.08.2025 | M. Çil | Kocaelispor | — | Loan |
| 04.08.2025 | M. Caktaš | Kocaelispor | — | Free agent |
| 31.07.2025 | B. Yıldız | Kocaelispor | — | Loan |
| 30.07.2025 | B. Yildiz | Kocaelispor | — | Loan |
| 25.07.2025 | Pedrinho | Kocaelispor | — | Free agent |
| 21.07.2025 | B. Alici | Kocaelispor | — | Free agent |
| 15.07.2025 | F. Özyapı | Kocaelispor | — | Free Transfer |
| 15.07.2025 | C. Osmanpaşa | Kocaelispor | — | Free agent |
| 14.07.2025 | H. Sarman | Kocaelispor | — | Free Transfer |
| 14.07.2025 | Furkan Ozyapi | Kocaelispor | — | Free agent |
| 13.07.2025 | Furkan Ozyapi | Kocaelispor | — | Free agent |
| 13.07.2025 | H. Sarman | Kocaelispor | — | Transfer |
| 12.07.2025 | E. Gedik | Kocaelispor | — | Free agent |
| 04.07.2025 | M. Yılmaz | Kocaelispor | — | Free Transfer |
| 03.07.2025 | M. Yılmaz | Kocaelispor | — | Free agent |
| 01.07.2025 | Marcão | Kocaelispor | — | N/A |
| 01.07.2025 | B. Şen | Kocaelispor | Galatasaray | N/A |
| 29.06.2025 | Marcão | Kocaelispor | — | Return from loan |
| 15.04.2025 | B. Şen | Kocaelispor | Galatasaray | Back from Loan |
| 14.02.2025 | G. Beridze | Kocaelispor | — | Free Transfer |
| 13.01.2025 | H. Sarman | Kocaelispor | — | Loan |
| 18.09.2024 | G. Kharaishvili | Kocaelispor | — | Free |