Kustosija U19: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2025-07-03 | Haris Berbic | Kustosija U19 | B. Banja Luka | — |
| 2024-09-10 | Haris Berbic | FK Buducnost | Kustosija U19 | Free |
| 2019-07-01 | Jan Jurcec | Kustosija U19 | NK Kustosija | — |
| 2017-07-01 | Jan Jurcec | Kustosija U17 | Kustosija U19 | — |