Chelsea U21: every transfer in and out, fees paid and earned, squad market value, €8.7m spent and €64m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | James Hillson | Chelsea U21 | Without Club | — |
| 2026-02-26 | James Hillson | Wealdstone | Chelsea U21 | Free |
| 2026-02-02 | Dujuan Richards | Chelsea U21 | Leicester | Loan |
| 2026-01-19 | Teddy Sharman-Lowe | Chelsea U21 | Chelsea | — |
| 2025-11-12 | Ted Curd | Chelsea U21 | Boreham Wood | Loan |
| 2025-09-02 | Kiano Dyer | Chelsea U21 | FC Volendam | Loan |
| 2025-09-02 | Ishé Samuels-Smith | Chelsea U21 | Swansea | Loan |
| 2025-09-01 | Omari Kellyman | Chelsea U21 | Cardiff | Loan |
| 2025-07-30 | Ishé Samuels-Smith | Chelsea U21 | R. Strasbourg | Loan |
| 2025-07-01 | Teddy Sharman-Lowe | Chelsea U21 | Bolton | Loan |
| 2025-07-01 | Reggie Walsh | Chelsea U18 | Chelsea U21 | — |
| 2025-07-01 | Landon Emenalo | Chelsea U18 | Chelsea U21 | — |
| 2025-07-01 | Genesis Antwi | Chelsea U18 | Chelsea U21 | — |
| 2025-02-03 | Somto Boniface | Chelsea U21 | Ipswich U21 | — |
| 2025-02-03 | Harvey Vale | Chelsea U21 | QPR | Free |
| 2025-01-17 | Zain Silcott-Duberry | Chelsea U21 | Bournemouth U21 | Free |
| 2025-01-17 | Max Merrick | Chelsea U21 | Hampton & Rich. | Loan |
| 2024-12-18 | Tyrique George | Chelsea U21 | Chelsea | — |
| 2024-12-18 | Josh Acheampong | Chelsea U21 | Chelsea | — |
| 2024-07-07 | Michael Golding | Chelsea U21 | Leicester | €5.9m |