Athletic Club
—
Unai Vencedor
LevanteReturn from loan29 Jun 2026
Hugo Rincón
GironaReturn from loan29 Jun 2026
Álvaro Djaló
Al-GharafaReturn from loan29 Jun 2026
Beñat Gerenabarrena—Return from loan29 Jun 2026- Beñat Gerenabarrena
CastellónReturn from loan29 Jun 2026 
Oier Gastesi
Arenas GetxoReturn from loan29 Jun 2026
Julen Agirrezabala
ValenciaReturn from loan29 Jun 2026
Aingeru Olabarrieta—Return from loan29 Jun 2026- Aingeru Olabarrieta
FC AndorraReturn from loan29 Jun 2026 
Iker Varela
MirandesReturn from loan29 Jun 2026
Peio Canales
Racing SantanderReturn from loan29 Jun 2026
Efe Korkut Martin—Transfer31 Jan 2026- Efe Korkut Martin
1. FC NürnbergTransfer31 Jan 2026 
Mikel Santos
Basconia—11 Sept 2025
Aymeric Laporte—Transfer10 Sept 2025- Aymeric Laporte
Al-NassrTransfer10 Sept 2025 - Aymeric LaporteAl-NassrTransfer9 Sept 2025
- Eric Pérez
EibarLoan16 Aug 2025 
Jesús Areso
OsasunaTransfer22 Jul 2025- Jesús AresoOsasunaTransfer21 Jul 2025
Mikel Vesga
AlmeriaFree agent1 Aug 2026- Mikel VesgaAlmeriaFree agent31 Jul 2026
Urko Izeta
Cadiz—10 Jul 2026- Urko IzetaCadiz—9 Jul 2026
Unai Gómez
UdineseTransfer7 Jul 2026
E. Garcia
CordobaLoan7 Jul 2026
Aimar Duñabeitia
Sporting GijonTransfer7 Jul 2026- Aimar DuñabeitiaSporting GijonTransfer6 Jul 2026
- I. SanzCordobaLoan6 Jul 2026
- Unai GómezUdineseTransfer6 Jul 2026
Jon de Luis
KifisiaFree agent3 Jul 2026- Jon de LuisKifisiaFree agent2 Jul 2026
Íñigo Lekue—End of career29 Jun 2026- Eric PérezEibarReturn from loan29 Jun 2026
- Unai VencedorLevanteLoan1 Sept 2025
- J. Bita
KustosijaTransfer1 Sept 2025 - Unai VencedorLevanteLoan31 Aug 2025
Malcom AduEibarTransfer17 Aug 2025- E. Garcia—Free agent17 Aug 2025
- M. Gibelalde—Free agent17 Aug 2025