| Player | From | Fee | Date |
|---|---|---|---|
| García José | Academy | Free | 16.08.2027 |
| Pérez Álvaro | Academy | Free | 16.08.2027 |
| León Jorge | Academy | Free | 16.08.2027 |
| Núñez Leo | Academy | Free | 16.08.2027 |
| Garrido Ismael | Academy | Free | 16.08.2027 |
| Rodríguez Marc | Academy | Free | 16.08.2027 |
| Ottiger Severin | Free Agent | Free | 20.08.2027 |
| Barnes Ashley | Free Agent | Free | 25.10.2027 |
| Romero Isaac | Sevilla | 15.6M | 06.01.2028 |
| Carlos Lazo José | Girona | 2.4M | 08.01.2028 |
| Román Miguel | Celta | 3.5M | 12.01.2028 |
| Zadehattar Abolfazl | Foolad | 3.6M | 18.01.2028 |
| Moremi Tshepang | Free Agent | Free | 18.01.2028 |
| Thorsby Morten | Free Agent | Free | 08.02.2028 |
| Marillat Yan | Free Agent | Free | 04.04.2028 |
| Klynge Anders | Free Agent | Free | 11.04.2028 |
| Player | To | Fee | Date |
|---|---|---|---|
| Barrenetxea Ander | Sevilla | 37.8M | 24.08.2027 |
| Herrera Yangel | Las Palmas | 19.1M | 28.08.2027 |
| Díaz Dani | Villarreal | 13.0M | 30.08.2027 |
| Barnes Ashley | Free Agent | Free | 30.10.2027 |
| Soler Carlos | Las Palmas | 13.9M | 11.01.2028 |
| Zakharyan Arsen | Atlético Madrid | 40.9M | 13.01.2028 |
| Muñoz Aihen | Huesca | 8.1M | 22.01.2028 |
| Marillat Yan | Free Agent | Free | 08.04.2028 |
| Player | To | Date | End Date |
|---|---|---|---|
| Osazuwa Sydney | Estoril Praia | 19.01.2028 | 18.05.2028 |
| Mariezkurrena Arkaitz | Getafe | 28.08.2027 | 24.05.2028 |
| Ramírez Darío | Burgos | 08.01.2028 | 03.11.2028 |
| Carbonell Tomy | Osasuna | 09.01.2028 | 04.11.2028 |
| Orobengoa Ekain | Córdoba | 15.01.2028 | 10.11.2028 |
| Eceizabarrena Jon | Andorra | 15.01.2028 | 10.11.2028 |
| Astiazarán Lander | Granada | 17.01.2028 | 12.11.2028 |
| Carrera Gorka | Alavés | 22.01.2028 | 21.05.2028 |
| Marín Pablo | Córdoba | 30.01.2028 | 29.05.2028 |
| Goti Mikel | Rayo Vallecano | 04.02.2028 | 30.11.2028 |
| Gorosabel Gorka | Zaragoza | 07.02.2028 | 03.12.2028 |
| Zadehattar Abolfazl | Cádiz | 07.02.2028 | 06.06.2028 |