 Athletic de Bilbao B |
| Founded: | 1898 |
| Official website: | www.athletic-club.net |
| E-mail: | prensa@athletic-club.net |
| Manager: | Jokin ARAMBARRI |
| Name: | Instalaciones de Lezama |
| Capacity: | 2,000 |
| Primera Federación 2025/26 | |
|
| 16-Nov-2025 | 1a Fed (12) | Athletic B | 2-1 | Arenteiro |
| 22-Nov-2025 | 1a Fed (13) | Guadalajara | 2-3 | Athletic B |
| 29-Nov-2025 | 1a Fed (14) | Athletic B | 2-0 | Lugo |
| 07-Dec-2025 | 1a Fed (15) | Arenas de Getxo | 3-1 | Athletic B |
| 14-Dec-2025 | 1a Fed (16) | Athletic B | 1-2 | Celta Fortuna |
| 19-Dec-2025 | 1a Fed (17) | Mérida | 2-3 | Athletic B |
| 04-Jan-2026 | 1a Fed (18) | Athletic B | 1-0 | Ponferradina |
| 10-Jan-2026 | 1a Fed (19) | Racing Ferrol | 0-1 | Athletic B |
| 16-Jan-2026 | 1a Fed (20) | Athletic B | - | Real Avilés |
| 25-Jan-2026 | 1a Fed (21) | Athletic B | - | Barakaldo |
| 01-Feb-2026 | 1a Fed (22) | Arenteiro | - | Athletic B |
| 08-Feb-2026 | 1a Fed (23) | Athletic B | - | Tenerife |
| 15-Feb-2026 | 1a Fed (24) | Real Madrid Castilla | - | Athletic B |
| 22-Feb-2026 | 1a Fed (25) | Athletic B | - | Zamora |
| 01-Mar-2026 | 1a Fed (26) | Lugo | - | Athletic B |
| 08-Mar-2026 | 1a Fed (27) | Athletic B | - | Arenas de Getxo |
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