Derby: every transfer in and out, fees paid and earned, squad market value, €43m spent and €61m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Callum Elder | Derby | Without Club | — |
| 2026-07-01 | Andreas Weimann | Derby | Without Club | — |
| 2026-02-05 | Andreas Weimann | Derby | Rapid Vienna | Loan |
| 2026-02-02 | Sammie Szmodics | Ipswich | Derby | Loan |
| 2026-01-29 | Jaydon Banel | Burnley U21 | Derby | Loan |
| 2026-01-02 | Oscar Fraulo | Mönchengladbach | Derby | €400k |
| 2025-09-02 | Kenzo Goudmijn | Derby | Go Ahead Eagles | Loan |
| 2025-08-31 | Ben Brereton Díaz | Southampton | Derby | Loan |
| 2025-08-27 | Max Johnston | Sturm Graz | Derby | €2.5m |
| 2025-07-29 | David Ozoh | Crystal Palace | Derby | Loan |
| 2025-07-15 | Patrick Agyemang | Charlotte | Derby | €6.9m |
| 2025-07-01 | Nathaniel Méndez-Laing | Derby | MK Dons | Free |
| 2025-07-01 | Andreas Weimann | Blackburn | Derby | Free |
| 2025-02-03 | Sondre Langås | Viking FK | Derby | €4.8m |
| 2025-02-03 | Harrison Armstrong | Everton | Derby | Loan |
| 2025-01-31 | Eiran Cashin | Derby | Brighton | €11m |
| 2024-08-30 | Marcus Harness | Ipswich | Derby | Loan |
| 2024-08-26 | Tawanda Chirewa | Wolves | Derby | Loan |
| 2024-08-16 | Jacob Widell Zetterström | Djurgården | Derby | €1.8m |
| 2024-07-24 | David Ozoh | Crystal Palace | Derby | Loan |