Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 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 | Malcom Adu | Athletic Club | — | Transfer |
| 17.08.2025 | M. Gibelalde | Athletic Club | — | Free agent |
| 17.08.2025 | E. Garcia | Athletic Club | — | Free agent |
| 16.08.2025 | Malcom Adu | Athletic Club | — | Free agent |
| 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 | Álvaro Djaló | Athletic Club | — | Loan |
| 28.07.2025 | Hugo Rincón | Athletic Club | Girona | Loan |
| 27.07.2025 | Luis Bilbao | Athletic Club | — | Free agent |
| 27.07.2025 | Álvaro Djaló | Athletic Club | — | Loan |
| 27.07.2025 | Luis Bilbao | Athletic Club | — | Free agent |
| 24.07.2025 | A. Marin | Athletic Club | — | Free agent |
| 24.07.2025 | A. Marin | Athletic Club | — | Free agent |
| 21.07.2025 | Iker Varela | Athletic Club | — | Loan |
| 20.07.2025 | Oier Gastesi | Athletic Club | — | Loan |
| 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 |
| 01.07.2025 | Unai Núñez | Athletic Club | Celta Vigo | N/A |
| 01.07.2025 | Beñat Gerenabarrena | Athletic Club | — | Loan |
| 30.06.2025 | Erlantz Palacín | Athletic Club | — | Free agent |
| 03.02.2025 | Javi Martón | Athletic Club | — | Loan |
| 02.02.2025 | Erlantz Palacín | Athletic Club | — | Loan |
| 31.01.2025 | Nico Serrano | Athletic Club | — | Loan |
| 17.01.2025 | Ander Herrera | Athletic Club | — | Transfer |
| 09.01.2025 | Álex Padilla | Athletic Club | — | Loan |
| 07.09.2024 | Muniain | Athletic Club | — | N/A |
| 30.08.2024 | Malcom Adu | Athletic Club | — | Loan |
| 29.08.2024 | Unai Eguíluz | Athletic Club | — | Loan |
| 11.08.2024 | Hugo Rincón | Athletic Club | — | Loan |
| 02.08.2024 | Juan Artola | Athletic Club | — | Free |
| 16.07.2024 | Imanol García de Albéniz | Athletic Club | Sparta Praha | € 500K |
| 15.07.2024 | Asier Villalibre | Athletic Club | Alaves | € 1M |
| 11.07.2024 | Unai Vencedor | Athletic Club | — | Loan |
| 05.07.2024 | Dani García | Athletic Club | Olympiakos Piraeus | Free |
| 02.07.2024 | Jon Morcillo | Athletic Club | — | Free |
| 01.07.2024 | Unai Núñez | Athletic Club | Celta Vigo | € 7M |
| 31.01.2024 | Peru Nolaskoain | Athletic Club | — | Free |
| 12.01.2024 | Nico Serrano | Athletic Club | — | Loan |
| 11.01.2024 | Luis Bilbao | Athletic Club | — | Loan |