Entradas
| a partir de | Apellido | Pos | Equipo | Equipo | ||
|---|---|---|---|---|---|---|
| 07/2012 |  | Artabe | D | |||
| 07/2012 | | Markel Etxeberria | D | |||
| 07/2012 | | Aitor Seguín | M |  | Athletic Club | Athletic |
| 07/2012 | | Bengoa | M |  | Athletic Club U19 | Bilbao U19 |
| 07/2012 | | Iker Undabarrena | M | |||
| 07/2012 | | Iñigo Lekue | M | |||
| 07/2012 | | Unai López | M | |||
| 07/2012 | | Gorka Santamaría | A | | Athletic Club U19 | Bilbao U19 |
| 07/2012 | | Sabin | A |  | Athletic Club B | Bilbao B |
| 07/2012 |  | Víctor Monteiro | A | | Athletic Club U19 | Bilbao U19 |
Salidas
| a partir de | Apellido | Pos | Equipo | Equipo | ||
|---|---|---|---|---|---|---|
| 02/2013 | | Kepa | P | | Athletic Club B | Bilbao B |
| 07/2012 | | Aymeric Laporte | D | | Athletic Club B | Bilbao B |
| 07/2012 | | Aketxe | M | | Athletic Club B | Bilbao B |
| 07/2012 | | Iker Guarrotxena | M | | Athletic Club B | Bilbao B |
| 07/2012 | | Jon Iru | M |  | Sestao River | Sestao River |
| 07/2012 | | Magdaleno | M | | Athletic Club B | Bilbao B |
| 07/2012 | | Sergio Mendigutxia | A |  | La Roda CF | La Roda |