Ajax U21: every transfer in and out, fees paid and earned, squad market value, €15m spent and €15m earned.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-02-03 | Gerald Alders | Ajax U21 | Telstar | Loan |
| 2026-02-02 | Charlie Setford | Ajax U21 | MK Dons | Loan |
| 2026-01-21 | Nassef Chourak | Ajax U21 | Kalmar FF | — |
| 2025-09-01 | Sean Steur | Ajax U21 | Ajax | — |
| 2025-09-01 | Rayane Bounida | Ajax U21 | Ajax | — |
| 2025-09-01 | Jorthy Mokio | Ajax U21 | Ajax | — |
| 2025-09-01 | Don-Angelo Konadu | Ajax U21 | Ajax | — |
| 2025-09-01 | Aaron Bouwman | Ajax U21 | Ajax | — |
| 2025-08-29 | Jan Faberski | Ajax U21 | PEC Zwolle | Loan |
| 2025-08-19 | Dies Janse | Ajax U21 | FC Groningen | Loan |
| 2025-08-11 | Nick Verschuren | Ajax U21 | FC Volendam | Loan |
| 2025-08-05 | Marvyn Muzungu | AJ Auxerre B | Ajax U21 | Free |
| 2025-07-01 | Precious Ugwu | Ajax U21 | FC Volendam | — |
| 2025-07-01 | Julian Rijkhoff | Ajax U21 | Almere City | Loan |
| 2025-02-04 | Gerald Alders | Ajax U21 | FC Twente | Loan |
| 2025-02-03 | Jaydon Banel | Ajax U21 | Burnley U21 | €1m |
| 2025-01-20 | Rayane Bounida | Ajax U19 | Ajax U21 | — |
| 2024-10-01 | Sean Steur | Ajax U19 | Ajax U21 | — |
| 2024-08-26 | Olivier Aertssen | Ajax U21 | PEC Zwolle | €150k |
| 2024-07-16 | Tristan Gooijer | Ajax U21 | PEC Zwolle | Loan |