Derby U21: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2024-07-01 | Owen Oseni | Derby U21 | Gateshead | Free |
| 2024-07-01 | Carlos Richards | Derby U21 | Without Club | — |
| 2024-02-02 | Owen Oseni | Derby U21 | Rushall | Loan |
| 2023-09-21 | Owen Oseni | Derby U21 | Nuneaton | Loan |
| 2023-07-01 | Carlos Richards | Derby U18 | Derby U21 | — |
| 2023-02-13 | Owen Oseni | Waterford FC | Derby U21 | — |
| 2022-09-01 | Leigh Kavanagh | Brighton U21 | Derby U21 | Loan |
| 2022-02-01 | Malcolm Ebiowei | Derby U23 | Derby | — |
| 2022-01-01 | Eiran Cashin | Derby U23 | Derby | — |
| 2021-09-11 | Malcolm Ebiowei | Rangers FC U18 | Derby U23 | — |
| 2021-07-01 | Luke Plange | Derby U23 | Derby | — |
| 2021-07-01 | Louie Watson | Derby U23 | Derby | — |
| 2021-07-01 | Festy Ebosele | Derby U23 | Derby | — |
| 2021-07-01 | Archie Brown | Derby U23 | Lausanne-Sport | Free |
| 2021-03-21 | Luke Plange | Arsenal U18 | Derby U23 | Free |
| 2020-10-15 | Louie Watson | West Ham U21 | Derby U23 | Free |
| 2020-07-01 | Henrich Ravas | Derby U23 | Derby | — |
| 2020-07-01 | Festy Ebosele | Derby U18 | Derby U23 | — |
| 2020-07-01 | Eiran Cashin | Derby U18 | Derby U23 | — |
| 2020-07-01 | Archie Brown | Derby U18 | Derby U23 | — |