Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 01.07.2016 | Markel Etxeberría | Athletic Club | Valladolid | Loan |
| 15.01.2016 | Kike Sola | Athletic Club | — | Loan |
| 01.01.2016 | Jon Agirrezabala | Athletic Club | — | Loan |
| 02.09.2015 | Ander Alday Valverde | Athletic Club | — | Loan |
| 17.08.2015 | Gorka Pérez | Athletic Club | — | Loan |
| 13.08.2015 | Jon Aurtenetxe | Athletic Club | — | Loan |
| 13.08.2015 | Guillermo Fernández | Athletic Club | Leganes | Loan |
| 11.08.2015 | Ruíz de Galarreta | Athletic Club | Leganes | Loan |
| 24.07.2015 | Mikel Juaristi Ariznabarreta | Athletic Club | — | N/A |
| 23.07.2015 | Erik Morán | Athletic Club | — | Loan |
| 20.07.2015 | Kepa | Athletic Club | Valladolid | Loan |
| 14.07.2015 | Gaizka Toquero Pinedo | Athletic Club | Alaves | Free |
| 12.07.2015 | Unai Albizua | Athletic Club | Leganes | Free |
| 08.07.2015 | Unai Bustinza | Athletic Club | Leganes | Loan |
| 07.07.2015 | Ander Artabe | Athletic Club | Levante | N/A |
| 01.07.2015 | de Eguino | Athletic Club | — | N/A |
| 29.01.2015 | Erik Morán | Athletic Club | Leganes | Loan |
| 28.01.2015 | Mario Barco | Athletic Club | — | € Free |
| 06.01.2015 | Kepa | Athletic Club | — | Loan |
| 27.08.2014 | Igor Arnáez | Athletic Club | — | Free |
| 21.08.2014 | Ander Artabe | Athletic Club | — | Loan |
| 21.08.2014 | Jonan Amelibia | Athletic Club | — | Loan |
| 21.08.2014 | Y. Rahmani | Athletic Club | — | Loan |
| 12.08.2014 | Ruíz de Galarreta | Athletic Club | — | Loan |
| 03.08.2014 | Iker Guarrotxena | Athletic Club | — | Loan |
| 31.07.2014 | Borja Ekiza Imaz | Athletic Club | — | N/A |
| 28.07.2014 | Jon Ander Felipe | Athletic Club | — | Loan |
| 28.07.2014 | Mikel Fernández | Athletic Club | — | N/A |
| 19.07.2014 | Iñigo Pérez | Athletic Club | — | Free |
| 18.07.2014 | Xabier Etxebarría Larrabide | Athletic Club | — | N/A |
| 15.07.2014 | Unai Albizua | Athletic Club | — | Loan |
| 10.07.2014 | Enric Saborit | Athletic Club | Mallorca | Loan |
| 07.07.2014 | Jonxa Vidal | Athletic Club | — | N/A |
| 07.07.2014 | Jon García | Athletic Club | — | N/A |
| 03.07.2014 | Íñigo Eguaras | Athletic Club | — | Free |
| 01.07.2014 | Ander Herrera | Athletic Club | Manchester United | € 37M |
| 01.07.2014 | Mikel Orbegozo | Athletic Club | Getafe | Free |
| 01.07.2014 | Gorka Magunazelaia | Athletic Club | Oviedo | N/A |
| 01.07.2014 | Jon Etxaniz | Athletic Club | — | N/A |
| 22.08.2013 | Jon Aurtenetxe | Athletic Club | Celta Vigo | Loan |
| 20.08.2013 | Iñigo Pérez | Athletic Club | Mallorca | Loan |
| 20.08.2013 | Ander Artabe | Athletic Club | — | Loan |
| 20.08.2013 | Jon Etxaniz | Athletic Club | — | Loan |
| 12.08.2013 | Jonás Ramalho | Athletic Club | Girona | Loan |
| 07.08.2013 | Lander Yurrebaso | Athletic Club | — | N/A |
| 06.08.2013 | Ruíz de Galarreta | Athletic Club | — | Loan |
| 31.07.2013 | Asier Goti | Athletic Club | — | N/A |
| 23.07.2013 | Galder Cerrajería | Athletic Club | — | N/A |
| 20.07.2013 | Eraso | Athletic Club | Leganes | N/A |
| 18.07.2013 | Isma López | Athletic Club | — | Free |