Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 10/2026 |  | Alejandro Cabrera | MF |  | Atlético Madrid U18 | U18 |
| 10/2026 | | José Ángel Liria | DF | | Atlético Madrid U18 | U18 |
| 10/2026 |  | Alexandru Grigorii | FW |  | Atlético Madrid U16 | U16 |
| 09/2026 |  | William Bediako | MF | |||
| 08/2026 |  | Mohamed Zinbi | DF |  | RSC Anderlecht U18 | U18 |
| 07/2026 | | Álvaro Vega | MF |  | Real Madrid U19 | Real Madrid U19 |
| 07/2026 | | Carlos Núñez | DF |  | Atlético Madrid U17 | U17 |
| 07/2026 |  | Mattías Fernández Smit | DF | |||
| 07/2026 |  | Adrian Lis-Zieliński | DF | | Atlético Madrid U17 | U17 |
| 07/2026 | | Curro Navarro | MF | | Atlético Madrid U18 | U18 |
| 07/2026 | | Brayan De la Cruz | FW | | Atlético Madrid U18 | U18 |
| 07/2026 | | Pedro Moya | MA |  | Atletico Madrid C | Atlético C |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2026 | | Diego Díaz | GK |  | UD SS Reyes | Sanse |
| 07/2026 | | Aimar García | DF |  | Real Madrid C | Real Madrid C |
| 07/2026 | | Dani Pérez | DF | | Atletico Madrid C | Atlético C |
| 07/2026 | | Jorge Domínguez | DF |  | Atlético Madrid | Atlético |
| 07/2026 | | Romeo Hueso | DF |  | Atlético Madrid B | Atlético B |
| 07/2026 | | Shadrack Addo | MF | | Atletico Madrid C | Atlético C |
| 07/2026 | | Sergio Esteban | FW | | Atlético Madrid B | Atlético B |
| 07/2026 | | Sergio Vinatea | FW | | Atletico Madrid C | Atlético C |
| 07/2026 | | Ángel Donato | MA |  | Girona FC B | Girona FC B |