Willem II U18: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2024-07-01 | Jens Mathijsen | Willem II U18 | Willem II | — |
| 2023-07-01 | Karst de Leeuw | Willem II U18 | Willem II U21 | — |
| 2023-07-01 | Jens Mathijsen | Willem II Youth | Willem II U18 | — |
| 2022-07-01 | Khaled Razak | Willem II U18 | Willem II U21 | — |
| 2021-07-01 | Maarten Schut | Willem II U18 | Willem II U21 | — |
| 2021-07-01 | Khaled Razak | Willem II Youth | Willem II U18 | — |
| 2020-07-01 | Maarten Schut | Willem II U17 | Willem II U18 | — |
| 2020-07-01 | Karst de Leeuw | Willem II Youth | Willem II U18 | — |