| Name | Pos | Birth | Nat |
|---|---|---|---|
| Unai Simón | GK | 11/06/97 | Spain |
| Julen Agirrezabala | GK | 26/12/00 | Spain |
| Álex Padilla | GK | 01/09/03 | Spain |
| Aymeric Laporte | DF | 27/05/94 | Spain |
| Yuri Berchiche | DF | 10/02/90 | Spain |
| Yeray Álvarez | DF | 24/01/95 | Spain |
| Daniel Vivian | DF | 05/07/99 | Spain |
| Andoni Gorosabel | DF | 04/08/96 | Spain |
| Jesús Areso | DF | 02/07/99 | Spain |
| Aitor Paredes Casamichana | DF | 29/04/00 | Spain |
| Hugo Rincón | DF | 27/01/03 | Spain |
| Adama Boiro | DF | 22/06/02 | Spain |
| Unai Egiluz | DF | 19/03/02 | Spain |
| Ruiz de Galarreta | MF | 06/08/93 | Spain |
| Oihan Sancet | MF | 25/04/00 | Spain |
| Unai Vencedor Paris | MF | 15/11/00 | Spain |
| Benat Prados | MF | 08/02/01 | Spain |
| Mikel Jauregizar | MF | 13/11/03 | Spain |
| Peio Canales | MF | 17/01/05 | Spain |
| Alejandro Rego | MF | 11/06/03 | Spain |
| Beñat Gerenabarrena | MF | 29/03/03 | Spain |
| Selton Sánchez | MF | 20/02/07 | Spain |
| Álex Berenguer | FW | 04/07/95 | Spain |
| Iñaki Williams | FW | 15/06/94 | Ghana |
| Gorka Guruzeta | FW | 12/09/96 | Spain |
| Roberto Navarro | FW | 12/04/02 | Spain |
| Nico Williams | FW | 12/07/02 | Spain |
| Nico Serrano | FW | 05/03/03 | Spain |
| Álvaro Djaló | FW | 16/08/99 | Spain |
| Sannadi | FW | 01/02/01 | Spain |
Athletic Club
Stadium: San Mamés
Foundation: 1898