ADO U21: every transfer in and out, fees paid and earned, squad market value, €66k spent.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2023-07-03 | Onur Demir | ADO U21 | Alanyaspor | — |
| 2023-02-01 | Elano Yegen | ADO U21 | Samsunspor | Free |
| 2023-01-06 | Sirong Li | ADO U21 | Vejle BK | Loan |
| 2022-07-01 | Silvinho Esajas | ADO U21 | ADO Den Haag | — |
| 2022-07-01 | Rafael Struick | ADO U21 | ADO Den Haag | — |
| 2022-07-01 | Finn van Breemen | ADO U21 | ADO Den Haag | — |
| 2022-01-31 | Elano Yegen | ADO U21 | MVV Maastricht | Loan |
| 2022-01-13 | Finn Dicke | ADO U21 | ADO Den Haag | — |
| 2022-01-01 | Sirong Li | ADO U18 | ADO U21 | — |
| 2021-07-01 | Xander Severina | ADO U21 | ADO Den Haag | — |
| 2021-07-01 | Sem Steijn | ADO U21 | ADO Den Haag | — |
| 2021-07-01 | Rafael Struick | ADO U18 | ADO U21 | — |
| 2021-07-01 | Onur Demir | Dordrecht U18 | ADO U21 | Free |
| 2021-07-01 | Jonathan Mulder | ADO U21 | ADO Den Haag | — |
| 2021-07-01 | Finn van Breemen | ADO U18 | ADO U21 | — |
| 2021-07-01 | Finn Dicke | ADO U18 | ADO U21 | — |
| 2021-07-01 | Elano Yegen | Quick | ADO U21 | Free |
| 2021-02-02 | Emilio Estevez | ADO U21 | Ourense CF | Free |
| 2020-09-02 | Silvinho Esajas | Verona U19 | ADO U21 | Free |
| 2020-07-30 | Lance Duijvestijn | ADO U21 | Helmond Sport | Free |