Istra 1961 U19 (U19 League): every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2025-07-24 | Luka Tomic | Istra 1961 U19 | Rijeka U19 | Free |
| 2025-04-10 | Alessandro Ramón Maldonado López | Istra 1961 U19 | Colorado Springs | Free |
| 2025-01-10 | Stipe Ukich | Auckland City | Istra 1961 U19 | Free |
| 2024-08-15 | Player | Istra 1961 U19 | Tuzla City | Free |
| 2024-07-01 | Marin Zgomba | Istra 1961 U19 | NK Istra 1961 | Free |
| 2024-07-01 | Lorenzo Travaglia | Istra 1961 U19 | NK Istra 1961 | Free |
| 2024-07-01 | Franco Corelli | Istra 1961 U19 | NK Istra 1961 | Free |
| 2024-07-01 | Jovan Ivanisevic | Istra 1961 U19 | NK Istra 1961 | Free |
| 2024-07-01 | Luka Djuranovic | Istra 1961 U19 | NK Istra 1961 | Free |
| 2023-08-11 | Marin Zgomba | Istra 1961 U19 | NK Bravo | Loan |
| 2023-07-11 | Marat Zlibanovic | Istra 1961 U19 | Orijent 1919 | Free |
| 2023-07-01 | Tomislav Glavan | Istra 1961 U19 | NK Istra 1961 | Free |
| 2023-07-01 | Nermin Mujkic | Istra 1961 U19 | Sloboda Tuzla | Free |
| 2023-01-26 | Marat Zlibanovic | Rijeka U19 | Istra 1961 U19 | Free |
| 2022-02-08 | Player | Istra 1961 U19 | NK Istra 1961 | Free |
| 2021-07-01 | Player | Istra 1961 U19 | NK Istra 1961 | Free |
| 2021-07-01 | Mihael Rovis | Istra 1961 U19 | NK Istra 1961 | Free |
| 2021-02-17 | Mihael Rovis | Rijeka U19 | Istra 1961 U19 | Free |
| 2020-07-01 | Player | Istra 1961 U19 | NK Istra 1961 | Free |
| 2019-07-01 | Player | Istra 1961 U19 | NK Istra 1961 | Free |