Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 01.07.2017 | Óscar Gil | Oviedo | Athletic Club | N/A |
| 01.07.2017 | Mikel Vesga | — | Athletic Club | N/A |
| 01.07.2017 | Unai López | Leganes | Athletic Club | N/A |
| 01.07.2017 | Asier Villalibre | — | Athletic Club | N/A |
| 03.02.2017 | Álex Remiro | Levante | Athletic Club | N/A |
| 29.01.2017 | Kike Sola | Getafe | Athletic Club | N/A |
| 11.08.2016 | Odei Onaindia | — | Athletic Club | € Free |
| 12.07.2016 | Tarsi | — | Athletic Club | Free |
| 01.07.2016 | Unai Bustinza | Leganes | Athletic Club | N/A |
| 01.07.2016 | Gorka Pérez | — | Athletic Club | N/A |
| 01.07.2016 | Jon Aurtenetxe | — | Athletic Club | N/A |
| 01.07.2016 | Guillermo Fernández | Leganes | Athletic Club | N/A |
| 01.07.2016 | Kepa | Valladolid | Athletic Club | N/A |
| 01.06.2016 | Kike Sola | — | Athletic Club | N/A |
| 22.01.2016 | Dopi | — | Athletic Club | N/A |
| 30.12.2015 | A. Pascual | — | Athletic Club | Transfer |
| 31.08.2015 | Raúl García | Atletico Madrid | Athletic Club | N/A |
| 01.07.2015 | Julen Arellano Sandúa | Barcelona | Athletic Club | N/A |
| 01.07.2015 | Eneko Bóveda Altube | — | Athletic Club | Free |
| 01.07.2015 | Gorka Elustondo Urkola | Real Sociedad | Athletic Club | Free |
| 01.07.2015 | Jonás Ramalho | Girona | Athletic Club | N/A |
| 01.07.2015 | Eraso | Leganes | Athletic Club | Free |
| 01.07.2015 | Ander Artabe | — | Athletic Club | N/A |
| 01.07.2015 | Izaro Abella | — | Athletic Club | N/A |
| 01.07.2015 | Iker Guarrotxena | — | Athletic Club | N/A |
| 16.01.2015 | Jon Ander Felipe | — | Athletic Club | N/A |
| 02.07.2014 | Mikel Vesga | Alaves | Athletic Club | N/A |
| 01.07.2014 | Borja Viguera Manzanares | Alaves | Athletic Club | N/A |
| 01.07.2014 | Mikel Juaristi Ariznabarreta | — | Athletic Club | N/A |
| 01.07.2014 | Ander Artabe | — | Athletic Club | N/A |
| 01.07.2014 | Jon Aurtenetxe | Celta Vigo | Athletic Club | N/A |
| 30.06.2014 | Mikel Orbegozo | — | Athletic Club | N/A |
| 31.01.2014 | Iñigo Pérez | Mallorca | Athletic Club | N/A |
| 21.08.2013 | Mikel Rico | Granada CF | Athletic Club | € 2.8M |
| 10.07.2013 | Mario Barco | — | Athletic Club | N/A |
| 04.07.2013 | Kike Sola | Osasuna | Athletic Club | N/A |
| 01.07.2013 | Jon Koldo Iruarrizaga Arteche | — | Athletic Club | N/A |
| 01.07.2013 | Igor Arnáez | — | Athletic Club | N/A |
| 01.07.2013 | Beñat | Real Betis | Athletic Club | € 8M |
| 01.07.2013 | Balenziaga | Valladolid | Athletic Club | N/A |
| 01.07.2013 | Iago Herrerín | — | Athletic Club | N/A |
| 01.07.2013 | Sabin Merino | — | Athletic Club | N/A |
| 30.06.2013 | Mikel Orbegozo | — | Athletic Club | N/A |
| 28.01.2013 | Aitor Fernández | Athletic Club | Athletic Club | N/A |
| 01.07.2012 | Iago Herrerín | Atletico Madrid | Athletic Club | Free |
| 01.07.2012 | Igor Arnáez | — | Athletic Club | N/A |
| 01.07.2012 | Aduriz | Valencia | Athletic Club | € 2.5M |
| 01.07.2012 | Gorka Magunazelaia | — | Athletic Club | N/A |
| 01.07.2012 | Jon Etxaniz | — | Athletic Club | N/A |
| 01.07.2012 | Unai Bilbao | — | Athletic Club | N/A |