Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 31.01.2026 | Efe Korkut Martin | — | Athletic Club | Transfer |
| 11.09.2025 | Mikel Santos | — | Athletic Club | - |
| 11.09.2025 | Aymeric Laporte | — | Athletic Club | Transfer |
| 10.09.2025 | Aymeric Laporte | — | Athletic Club | Transfer |
| 10.09.2025 | Aymeric Laporte | — | Athletic Club | Transfer |
| 09.09.2025 | Aymeric Laporte | — | Athletic Club | Transfer |
| 16.08.2025 | Eric Pérez | — | Athletic Club | Loan |
| 22.07.2025 | Jesús Areso | Osasuna | Athletic Club | Transfer |
| 21.07.2025 | Jesús Areso | Osasuna | Athletic Club | Transfer |
| 20.07.2025 | Jesús Areso | Osasuna | Athletic Club | Transfer |
| 04.07.2025 | M. Gibelalde | Real Sociedad | Athletic Club | Free agent |
| 04.07.2025 | E. Garcia | Real Sociedad | Athletic Club | Free agent |
| 01.07.2025 | Robert Navarro | Mallorca | Athletic Club | Free Transfer |
| 01.07.2025 | Álex Padilla | — | Athletic Club | Back from Loan |
| 01.07.2025 | Hugo Rincón | — | Athletic Club | Back from Loan |
| 01.07.2025 | Unai Eguíluz | — | Athletic Club | Back from Loan |
| 01.07.2025 | Unai Vencedor | — | Athletic Club | Back from Loan |
| 01.07.2025 | Javi Martón | — | Athletic Club | Back from Loan |
| 01.07.2025 | Nico Serrano | — | Athletic Club | Back from Loan |
| 01.07.2025 | Malcom Adu | — | Athletic Club | Back from Loan |
| 30.06.2025 | Robert Navarro | Mallorca | Athletic Club | Free agent |
| 30.06.2025 | E. Gift | — | Athletic Club | - |
| 29.06.2025 | Malcom Adu | — | Athletic Club | Return from loan |
| 29.06.2025 | Robert Navarro | Mallorca | Athletic Club | Free agent |
| 29.06.2025 | Aimar Vicandi | — | Athletic Club | Return from loan |
| 29.06.2025 | J. Sola | — | Athletic Club | Return from loan |
| 29.06.2025 | A. Santamaria | — | Athletic Club | Return from loan |
| 29.06.2025 | A. Marin | — | Athletic Club | Return from loan |
| 29.06.2025 | M. Gibelalde | Real Sociedad | Athletic Club | Free agent |
| 29.06.2025 | Erlantz Palacín | — | Athletic Club | Return from loan |
| 29.06.2025 | Erlantz Palacín | — | Athletic Club | Return from loan |
| 29.06.2025 | E. Garcia | Real Sociedad | Athletic Club | Free agent |
| 29.06.2025 | Hugo Rincón | — | Athletic Club | Return from loan |
| 29.06.2025 | Unai Eguíluz | — | Athletic Club | Return from loan |
| 29.06.2025 | Unai Vencedor | — | Athletic Club | Return from loan |
| 29.06.2025 | Javi Martón | — | Athletic Club | Return from loan |
| 29.06.2025 | Nico Serrano | — | Athletic Club | Return from loan |
| 29.06.2025 | Luis Bilbao | — | Athletic Club | Return from loan |
| 01.02.2025 | Maroan Sannadi | — | Athletic Club | Transfer |
| 28.08.2024 | Unai Núñez | Celta Vigo | Athletic Club | Loan |
| 01.07.2024 | Álvaro Djaló | SC Braga | Athletic Club | € 15M |
| 01.07.2024 | Gorosabel | Alaves | Athletic Club | Free |
| 01.07.2024 | Nico Serrano | — | Athletic Club | N/A |
| 01.07.2024 | Unai Vencedor | — | Athletic Club | N/A |
| 01.07.2024 | Javi Martón | — | Athletic Club | N/A |
| 01.07.2024 | Juan Artola | — | Athletic Club | N/A |
| 01.07.2023 | Nico Serrano | — | Athletic Club | N/A |
| 01.07.2023 | Alex Petxarroman | — | Athletic Club | N/A |
| 01.07.2023 | Asier Villalibre | Alaves | Athletic Club | N/A |
| 01.07.2023 | Peru Nolaskoain | — | Athletic Club | N/A |