Chelsea U18 (Premier League U18): every transfer in and out, fees paid and earned, squad market value, €1.9m spent and €4.9m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-17 | Chris Atherton | Chelsea U18 | Ipswich Town U18 | Free |
| 2025-07-26 | H. Rodda | Chelsea U18 | Southampton U18 | Free |
| 2025-07-12 | Marcell Washington | Chelsea U18 | Arsenal U21 | Free |
| 2025-07-04 | Chris Atherton | Glenavon | Chelsea U18 | Free |
| 2025-07-01 | Joel Vidal-Philbert | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | Player | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | Mahdi Nicoll-Jazuli | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | R. Watson | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | Charlie Holland | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | Dante Waite | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | Toby Bell | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | Hezekiah Grimwade | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | Ibrahim Rabbaj | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | Mathis Eboue | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | Lewis Richards | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | Reggie Walsh | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | Jacob Hall | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | Freddy Bernal | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | Chizaram Ezenwata | Chelsea Yth | Chelsea U18 | Free |
| 2025-07-01 | Ryan Kavuma-McQueen | Chelsea Yth | Chelsea U18 | Free |