Athletic Bilbao (LaLiga): every transfer in and out, fees paid and earned, squad market value, €130m spent and €199m earned. Tracked squad: ACTUAL Value €125m vs €198m market value. Valued as of 2026-08-26.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-08-10 | Julen Agirrezabala | Athletic Bilbao | Racing Santander | €4.5m |
| 2026-08-02 | Mikel Vesga | Athletic Bilbao | UD Almería | Free |
| 2026-07-11 | Urko Izeta | Athletic Bilbao | Cádiz CF | Free |
| 2026-07-08 | Eder García | Athletic Bilbao | Córdoba CF | Loan |
| 2026-07-08 | Unai Gómez | Athletic Bilbao | Udinese Calcio | €4.5m |
| 2025-11-01 | Selton Sánchez | CD Basconia | Athletic Club | — |
| 2025-09-01 | Aymeric Laporte | Al-Nassr | Athletic Club | €10m |
| 2025-09-01 | Unai Vencedor | Athletic Club | Levante | Loan |
| 2025-08-17 | Adu Ares | Athletic Bilbao | SD Eibar | Free |
| 2025-08-15 | Peio Canales | Athletic Bilbao | Racing Santander | Loan |
| 2025-07-29 | Hugo Rincón | Athletic Club | Girona | Loan |
| 2025-07-28 | Álvaro Djaló | Athletic Club | Al-Gharafa | Loan |
| 2025-07-28 | Álvaro Djaló | Athletic Bilbao | Al Gharafa | Loan |
| 2025-07-22 | Jesús Areso | CA Osasuna | Athletic Club | €12m |
| 2025-07-16 | Javi Martón | Athletic Bilbao | SD Eibar | Free |
| 2025-07-11 | Julen Agirrezabala | Athletic Club | Valencia | Loan |
| 2025-07-02 | Beñat Gerenabarrena | Athletic Bilbao | Castellón | Loan |
| 2025-07-01 | Alejandro Rego | Bilbao Athletic | Athletic Club | — |
| 2025-07-01 | Robert Navarro | RCD Mallorca | Athletic Club | Free |
| 2025-07-01 | Beñat Gerenabarrena | Athletic Club II | Athletic Bilbao | Free |