Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 01.07.2010 | Mikel San José Domínguez | Liverpool | Athletic Club | € 2.7M |
| 01.07.2010 | Eneko Bóveda Altube | Athletic Club | — | N/A |
| 01.07.2010 | Ander Larrucea Arrien | Athletic Club | — | Loan |
| 01.07.2010 | Urtzi Iturrioz Urkiza | Athletic Club | — | N/A |
| 01.07.2010 | Ibai Gómez | — | Athletic Club | N/A |
| 01.07.2010 | Igor Martínez Caseras | Alaves | Athletic Club | € 200K |
| 01.07.2010 | Balenziaga | — | Athletic Club | N/A |
| 01.07.2010 | Isaac Aketxe | Athletic Club | — | Loan |
| 01.07.2010 | Raúl Fernández | Granada CF | Athletic Club | N/A |
| 01.07.2010 | Aitor Fernández | — | Athletic Club | N/A |
| 30.06.2010 | Mikel San José Domínguez | Athletic Club | Liverpool | N/A |
| 14.08.2009 | Mikel San José Domínguez | Liverpool | Athletic Club | Loan |
| 11.08.2009 | Balenziaga | Athletic Club | — | Loan |
| 10.07.2009 | De Marcos | Alaves | Athletic Club | € 350K |
| 01.07.2009 | Mikel Santamaría | — | Athletic Club | N/A |
| 01.01.2009 | Gaizka Toquero Pinedo | — | Athletic Club | N/A |
| 31.08.2008 | Gaizka Toquero Pinedo | Athletic Club | — | Loan |
| 01.08.2008 | Beñat | Athletic Club | — | Loan |
| 01.08.2008 | Balenziaga | Real Sociedad | Athletic Club | € 1M |
| 01.07.2008 | Ion Vélez Martínez | — | Athletic Club | N/A |
| 01.07.2008 | Aduriz | Athletic Club | Mallorca | € 6M |
| 01.07.2008 | Raúl Fernández | Athletic Club | — | Loan |
| 04.01.2008 | Ion Vélez Martínez | Athletic Club | — | Loan |
| 01.08.2007 | Gorka Iraizoz Moreno | Espanyol | Athletic Club | € 4M |
| 01.08.2007 | Unai Alba Pagadizábal | Athletic Club | — | N/A |
| 01.07.2007 | Koikili | — | Athletic Club | Free |
| 01.07.2007 | David López | Osasuna | Athletic Club | € 5.8M |
| 01.01.2007 | David Rodríguez | Las Palmas | Athletic Club | N/A |
| 01.07.2006 | Javi Martínez | Osasuna | Athletic Club | € 6M |
| 01.01.2006 | Aduriz | Valladolid | Athletic Club | € 3M |
| 01.07.2003 | Aduriz | Athletic Club | — | Free |
| 01.07.2001 | Gorka Iraizoz Moreno | Athletic Club | — | Free |