Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 01/2015 |  | Íñigo Pradera | FW |  | SD Zamudio | SD Zamudio |
| 07/2014 | | Areitio | GK | |||
| 07/2014 | | Unai Etxebarria | GK | |||
| 07/2014 | | Unai Simón | GK |  | Athletic Club U19 | Bilbao U19 |
| 07/2014 | | Ander Santamaría | DF | | Athletic Club U19 | Bilbao U19 |
| 07/2014 | | Alday | MF | |||
| 07/2014 | | Baqué | MF | |||
| 07/2014 | | Córdoba | MF | |||
| 07/2014 | | Gorka Pérez | MF | |||
| 07/2014 | | Guruzeta | FW | |||
| 07/2014 | | Joseba Etxeberria | AS-CO |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2014 |  | Yanis Rahmani | MF |  | Sestao River | Sestao River |
| 07/2014 | | Jon Ander | GK |  | SD Amorebieta | SD Amorebieta |
| 07/2014 | | Remiro | GK |  | Athletic Club | Athletic |
| 07/2014 | | Elgezabal | DF |  | SCD Durango | Durango |
| 07/2014 | | Urtzi Iriondo | DF |  | Athletic Club B | Bilbao B |
| 07/2014 | | Yeray | DF | | Athletic Club | Athletic |
| 07/2014 | | Aitor Seguín | MF | | Athletic Club B | Bilbao B |
| 07/2014 | | Bengoa | MF | | Athletic Club B | Bilbao B |
| 07/2014 | | Gorka Iturraspe | MF | | Athletic Club | Athletic |
| 07/2014 | | Jurgi | MF | | Athletic Club | Athletic |
| 07/2014 | | Gorka Santamaría | FW | | Athletic Club B | Bilbao B |
| 07/2014 |  | Iñaki Williams | FW | | Athletic Club | Athletic |