Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2015 |  | Oier Sarriegi | DF | |||
| 07/2015 | | Izaro Abella | MF |  | SD Amorebieta | SD Amorebieta |
| 07/2015 | | Jorge Bengoetxea | MF |  | Arenas de Getxo | Arenas de Getxo |
| 07/2015 | | Markel Lozano | MF |  | Athletic Club U19 | Bilbao U19 |
| 07/2015 | | Alex Valiño | FW | | Athletic Club U19 | Bilbao U19 |
| 07/2015 | | Arzuaga | FW | | Athletic Club U19 | Bilbao U19 |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2015 | | Areitio | GK |  | SCD Durango | Durango |
| 07/2015 | | De Eguino | DF |  | SD Zamudio | SD Zamudio |
| 07/2015 | | Imanol Corral | DF |  | CD Vitoria | CD Vitoria |
| 07/2015 | | Jon Agirrezabala | DF |  | Athletic Club B | Bilbao B |
| 07/2015 | | Alday | MF | | SD Zamudio | SD Zamudio |
| 07/2015 | | Córdoba | MF | | Athletic Club B | Bilbao B |
| 07/2015 | | Gorka Pérez | MF |  | SD Gernika | Gernika |
| 07/2015 | | Guruzeta | FW | | Athletic Club B | Bilbao B |
| 07/2015 | | Villalibre | FW | | Athletic Club B | Bilbao B |
| 07/2015 | | Joseba Etxeberria | AS-CO |  | Athletic Club | Athletic |