Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 04/2026 |  | Nauzet Cubas | GK | |||
| 03/2026 | | Eñaut Vadillo | GK | |||
| 03/2026 | | Markel Imaz | GK | |||
| 02/2026 | | Xabi Sánchez | ||||
| 02/2026 | | Hodei Barbarín | DF |  | Sestao River | Sestao River |
| 11/2025 | | Anher Ezkerra | DF | |||
| 11/2025 | | Endika Iriarte | MF | |||
| 09/2025 | | Nabil Abouallal | MF | |||
| 09/2025 | | Xabi Monreal | MF | |||
| 09/2025 | | Jon Elorza | FW | |||
| 08/2025 | | Alex Fernandorena | DF |  | Real Sociedad C | Real Sociedad C |
| 08/2025 | | Aritz Huete | DF | |||
| 08/2025 | | Beñat Almandoz | DF | |||
| 08/2025 | | Aitor Lorea | MF |  | US Ivry | US Ivry |
| 08/2025 | | Cristian | MF | |||
| 07/2025 | | Aritz Urteaga | GK | |||
| 07/2025 | | Domenic Torres | DF | | Real Sociedad C | Real Sociedad C |
| 07/2025 | | Ibai Aguirre | MF |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2025 | | Markel Peral | DF | | Real Sociedad C | Real Sociedad C |