| Name | Pos | Birth | Nat |
|---|---|---|---|
| Unai Simón | GK | 11/06/97 | Spain |
| Álex Padilla | GK | 01/09/03 | Spain |
| Mikel Santos | GK | 01/11/04 | Spain |
| Unai Eguíluz | DF | 19/03/02 | Spain |
| Jon de Luis | DF | 05/08/03 | Spain |
| Iker Monreal | DF | 03/07/05 | Spain |
| Ander Izaguirre | DF | 28/06/03 | Spain |
| Alejandro Rego | MF | 11/06/03 | Spain |
| Ibon Sánchez | MF | 08/03/04 | Spain |
| Selton Sánchez | MF | 20/02/07 | Spain |
| Urko Izeta | FW | 29/09/99 | Spain |
| Adrián Pérez | FW | 25/10/06 | Spain |
| Asier Hierro | FW | 06/05/05 | Spain |
| Nico Williams | Left Winger | 12/07/02 | Spain |
| Aitor Paredes Casamichana | Centre-Back | 29/04/00 | Spain |
| Jesús Areso | Right-Back | 02/07/99 | Spain |
| Oihan Sancet | Attacking Midfield | 25/04/00 | Spain |
| Roberto Navarro | Attacking Midfield | 12/04/02 | Spain |
| Mikel Vesga | Defensive Midfield | 08/04/93 | Spain |
| Gorka Guruzeta | Centre-Forward | 12/09/96 | Spain |
| Andoni Gorosabel | Right-Back | 04/08/96 | Spain |
| Iñaki Williams | Right Winger | 15/06/94 | Ghana |
| Daniel Vivian | Centre-Back | 05/07/99 | Spain |
| Iñigo Lekue | Right-Back | 04/05/93 | Spain |
| Yeray Álvarez | Centre-Back | 24/01/95 | Spain |
| Ruiz de Galarreta | Central Midfield | 06/08/93 | Spain |
| Yuri Berchiche | Left-Back | 10/02/90 | Spain |
| Aymeric Laporte | Centre-Back | 27/05/94 | Spain |
| Álex Berenguer | Left Winger | 04/07/95 | Spain |
| Sannadi | Centre-Forward | 01/02/01 | Spain |
| Adama Boiro | Left-Back | 22/06/02 | Spain |
| Mikel Jauregizar | Central Midfield | 13/11/03 | Spain |
| Unai Gomez | Attacking Midfield | 25/05/03 | Spain |
| Nico Serrano | Left Winger | 05/03/03 | Spain |
| Benat Prados | Central Midfield | 08/02/01 | Spain |
Athletic Club
Coach: Ernesto Valverde
Stadium: San Mamés
Foundation: 1898