Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 01.07.2023 | Beñat Prados | — | Athletic Club | N/A |
| 01.07.2023 | Ruíz de Galarreta | Mallorca | Athletic Club | Free |
| 01.07.2023 | Asier Villalibre | Alaves | Athletic Club | N/A |
| 26.04.2023 | Unai Gómez | — | Athletic Club | N/A |
| 31.01.2023 | Ander Herrera | Paris Saint Germain | Athletic Club | N/A |
| 27.08.2022 | Ander Herrera | Paris Saint Germain | Athletic Club | Loan |
| 12.08.2022 | Malcom Adu | — | Athletic Club | N/A |
| 12.08.2022 | Álex Padilla | — | Athletic Club | N/A |
| 03.07.2022 | Gorka Guruzeta | — | Athletic Club | Free |
| 01.07.2022 | Imanol García de Albéniz | — | Athletic Club | N/A |
| 01.07.2022 | Iñigo Córdoba | GO Ahead Eagles | Athletic Club | N/A |
| 01.07.2022 | Jon Morcillo | Valladolid | Athletic Club | N/A |
| 01.07.2022 | Peru Nolaskoain | — | Athletic Club | N/A |
| 01.07.2022 | Iñigo Vicente | — | Athletic Club | N/A |
| 01.07.2021 | K. Kodro | Valladolid | Athletic Club | N/A |
| 01.07.2021 | Iñigo Córdoba | Alaves | Athletic Club | N/A |
| 01.07.2021 | Dani Vivian | — | Athletic Club | N/A |
| 02.10.2020 | Álex Berenguer | Torino | Athletic Club | N/A |
| 04.08.2020 | Peru Nolaskoain | — | Athletic Club | N/A |
| 04.08.2020 | Iñigo Vicente | — | Athletic Club | N/A |
| 01.07.2020 | C. Ganea | — | Athletic Club | N/A |
| 01.07.2020 | Hodei Oleaga | — | Athletic Club | N/A |
| 01.01.2020 | Jefferson Luís | — | Athletic Club | Loan |
| 04.07.2019 | Antxón Jaso | — | Athletic Club | N/A |
| 01.07.2019 | Jokin Ezkieta | Barcelona | Athletic Club | N/A |
| 01.07.2019 | Xabier Etxeita | — | Athletic Club | N/A |
| 01.07.2019 | Jurgi Oteo | — | Athletic Club | N/A |
| 01.07.2019 | C. Ganea | — | Athletic Club | N/A |
| 01.07.2019 | Mikel Vesga | Leganes | Athletic Club | N/A |
| 31.01.2019 | K. Kodro | FC Copenhagen | Athletic Club | N/A |
| 10.01.2019 | Ibai Gómez | Alaves | Athletic Club | € 4M |
| 02.07.2018 | Capa | — | Athletic Club | € 3M |
| 02.07.2018 | C. Ganea | — | Athletic Club | € 1M |
| 02.07.2018 | Dani García | — | Athletic Club | Free |
| 02.07.2018 | Yuri | Paris Saint Germain | Athletic Club | € 24M |
| 01.07.2018 | Murgoitio | — | Athletic Club | N/A |
| 01.07.2018 | Josu Juste | — | Athletic Club | N/A |
| 01.07.2018 | Oier Luengo | — | Athletic Club | N/A |
| 01.07.2018 | Unai López | Rayo Vallecano | Athletic Club | N/A |
| 01.07.2018 | Álex Remiro | — | Athletic Club | N/A |
| 30.01.2018 | Íñigo Martínez | Real Sociedad | Athletic Club | € 32M |
| 01.07.2017 | Kike Sola | — | Athletic Club | N/A |
| 01.07.2017 | Gorka Santamaría | Cadiz | Athletic Club | N/A |
| 01.07.2017 | Asier Benito | Alaves | Athletic Club | N/A |
| 01.07.2017 | Íñigo Muñoz | — | Athletic Club | N/A |
| 01.07.2017 | Jonan Amelibia | — | Athletic Club | N/A |
| 01.07.2017 | Izaro Abella | — | Athletic Club | N/A |
| 01.07.2017 | Urtzi Urzelai | — | Athletic Club | N/A |
| 01.07.2017 | Iago Herrerín | Leganes | Athletic Club | N/A |
| 01.07.2017 | Ager Aketxe | Cadiz | Athletic Club | N/A |