Istanbul U21: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2019-07-01 | Mehmet Yeşil | Istanbul U21 | Istanbulspor | — |
| 2019-07-01 | Alperen Çaylak | Istanbul U21 | Istanbul U19 | — |
| 2019-01-05 | Mehmet Yeşil | Istanbul U21 | Ofspor | Loan |
| 2018-01-18 | Muammer Sarıkaya | Istanbulspor | Istanbul U21 | Loan |
| 2017-08-10 | Alperen Çaylak | Beylerbeyi Yth | Istanbul U21 | Free |
| 2017-07-01 | Mehmet Yeşil | Istanbul U19 | Istanbul U21 | — |