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 | Aymeric Laporte | — | Athletic Club | Transfer |
| 11.09.2025 | Mikel Santos | — | Athletic Club | - |
| 10.09.2025 | Aymeric Laporte | — | Athletic Club | Transfer |
| 10.09.2025 | Aymeric Laporte | — | Athletic Club | Transfer |
| 09.09.2025 | Aymeric Laporte | — | Athletic Club | Transfer |
| 01.09.2025 | Unai Vencedor | Athletic Club | Levante | Loan |
| 01.09.2025 | J. Bita | Athletic Club | — | Transfer |
| 31.08.2025 | Unai Vencedor | Athletic Club | Levante | Loan |
| 17.08.2025 | E. Garcia | Athletic Club | — | Free agent |
| 17.08.2025 | Malcom Adu | Athletic Club | — | Transfer |
| 17.08.2025 | M. Gibelalde | Athletic Club | — | Free agent |
| 16.08.2025 | Malcom Adu | Athletic Club | — | Free agent |
| 16.08.2025 | Eric Pérez | — | Athletic Club | Loan |
| 15.08.2025 | Malcom Adu | Athletic Club | — | Free agent |
| 15.08.2025 | Peio Canales | Athletic Club | — | Loan |
| 14.08.2025 | Peio Canales | Athletic Club | — | Loan |
| 08.08.2025 | Aingeru Olabarrieta | Athletic Club | — | Loan |
| 08.08.2025 | Aingeru Olabarrieta | Athletic Club | — | Loan |
| 30.07.2025 | Oier Gastesi | Athletic Club | — | Free agent |
| 29.07.2025 | Hugo Rincón | Athletic Club | Girona | Loan |
| 28.07.2025 | Hugo Rincón | Athletic Club | Girona | Loan |
| 28.07.2025 | Álvaro Djaló | Athletic Club | — | Loan |
| 27.07.2025 | Luis Bilbao | Athletic Club | — | Free agent |
| 27.07.2025 | Luis Bilbao | Athletic Club | — | Free agent |
| 27.07.2025 | Álvaro Djaló | Athletic Club | — | Loan |
| 24.07.2025 | A. Marin | Athletic Club | — | Free agent |
| 24.07.2025 | A. Marin | Athletic Club | — | Free agent |
| 22.07.2025 | Jesús Areso | Osasuna | Athletic Club | Transfer |
| 21.07.2025 | Jesús Areso | Osasuna | Athletic Club | Transfer |
| 21.07.2025 | Iker Varela | Athletic Club | — | Loan |
| 20.07.2025 | Oier Gastesi | Athletic Club | — | Loan |
| 20.07.2025 | Jesús Areso | Osasuna | Athletic Club | Transfer |
| 16.07.2025 | Javi Martón | Athletic Club | — | Transfer |
| 15.07.2025 | Javi Martón | Athletic Club | — | Transfer |
| 14.07.2025 | Javi Martón | Athletic Club | — | Transfer |
| 11.07.2025 | Julen Agirrezabala | Athletic Club | Valencia | Loan |
| 10.07.2025 | Julen Agirrezabala | Athletic Club | Valencia | Loan |
| 04.07.2025 | E. Garcia | Real Sociedad | Athletic Club | Free agent |
| 04.07.2025 | M. Gibelalde | Real Sociedad | Athletic Club | Free agent |
| 01.07.2025 | Malcom Adu | — | Athletic Club | Back from Loan |
| 01.07.2025 | Beñat Gerenabarrena | Athletic Club | — | Loan |
| 01.07.2025 | Unai Núñez | Athletic Club | Celta Vigo | N/A |
| 01.07.2025 | Robert Navarro | Mallorca | Athletic Club | Free Transfer |
| 01.07.2025 | Javi Martón | — | Athletic Club | Back from Loan |
| 01.07.2025 | Unai Vencedor | — | Athletic Club | Back from Loan |
| 01.07.2025 | Nico Serrano | — | Athletic Club | Back from Loan |
| 01.07.2025 | Unai Eguíluz | — | Athletic Club | Back from Loan |
| 01.07.2025 | Álex Padilla | — | Athletic Club | Back from Loan |
| 01.07.2025 | Hugo Rincón | — | Athletic Club | Back from Loan |