Fortuna Sittard U21 (U21 Divisie 1): every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2025-07-01 | Hasip Korkmazyürek | Fortuna Sittard U21 | Fortuna Sittard | Free |
| 2025-07-01 | Player | Fortuna Sittard U21 | Fortuna Sittard | Free |
| 2025-01-01 | Nathan Kaninda | Fortuna Sittard U21 | De Graafschap U21 | Free |
| 2024-07-01 | Player | MVV Maastricht | Fortuna Sittard U21 | Free |
| 2024-07-01 | Tristan Schenkhuizen | Fortuna Sittard U21 | Fortuna Sittard | Free |
| 2024-07-01 | Player | Fortuna Sittard U21 | Fortuna Sittard | Free |
| 2024-07-01 | Player | Fortuna Sittard U21 | Ajax Amateurs | Free |
| 2024-07-01 | Bryant Nieling | Fortuna Sittard U21 | SC Cambuur Leeuwarden | Free |
| 2024-07-01 | Player | Fortuna Sittard U21 | SteDoCo | Free |
| 2023-08-25 | Hasip Korkmazyürek | İstanbulspor U19 | Fortuna Sittard U21 | Free |
| 2023-08-07 | Bryant Nieling | Fortuna Sittard U21 | MVV Maastricht | Loan |
| 2023-07-27 | Player | Fortuna Sittard U21 | FC Wegberg-Beeck | Free |
| 2023-07-20 | Namory Cisse | Fortuna Sittard U21 | Austria Lustenau | Free |
| 2023-07-01 | Sofiane Et-Taïbi | KRC Genk | Fortuna Sittard U21 | Free |
| 2023-07-01 | Player | Fortuna Sittard U21 | Groene Ster | Free |
| 2022-08-26 | Player | Fortuna Sittard U21 | Fatih Karagümrük | Free |
| 2022-08-11 | Namory Cisse | Koln U19 | Fortuna Sittard U21 | Free |
| 2022-07-01 | Player | Bayer Leverkusen U19 | Fortuna Sittard U21 | Free |
| 2022-07-01 | Tunahan Taşçı | Fortuna Sittard U21 | Fortuna Sittard | Free |
| 2021-07-01 | Ronan Plujimen | Fortuna Sittard U21 | Fortuna Sittard | Free |