| 11.07.26 15:00 | Alaves U-19 - : - Athletic U19 |
| 04.04.27 15:00 | Athletic U19 - : - Cultural Leonesa U19 |
| 04.11.27 15:00 | Danok Bat U-19 - : - Athletic U19 |
| 04.18.27 15:00 | Athletic U19 - : - SD Indautxu U19 |
| 04.25.27 15:00 | Valladolid U-19 - : - Athletic U19 |
| 05.02.27 15:00 | Athletic U19 - : - Eibar U-19 |
| 11.01.26 11:00 | Athletic U19 5 : 2 Leioa U-19 |
| 10.24.26 17:30 | Santutxu U-19 0 : 2 Athletic U19 |
| 10.18.26 14:00 | Athletic U19 2 : 1 Real Sociedad U19 |
| 10.11.26 10:00 | Mereo Logrono U-19 0 : 5 Athletic U19 |
| 10.04.26 14:00 | Athletic U19 8 : 0 Betono U-19 |
| 09.20.26 14:00 | Unionstas U-19 1 : 0 Athletic U19 |
| 09.12.26 15:30 | Antiguoko U-19 2 : 3 Athletic U19 |
| 09.05.26 10:00 | Athletic U19 3 : 0 UD Logrones U-19 |
| 05.03.26 14:30 | AD San Juan U-19 0 : 0 Athletic U19 |
| 04.25.26 14:30 | Athletic U19 4 : 1 Eibar U-19 |
| 04.19.26 10:00 | Leioa U-19 0 : 2 Athletic U19 |
| 04.12.26 10:00 | Athletic U19 2 : 1 Betono U-19 |
| 04.03.26 14:00 | Santutxu U-19 3 : 2 Athletic U19 |
| 03.21.26 11:00 | Athletic U19 1 : 1 Alaves U-19 |
| 03.14.26 17:30 | Oberena U-19 0 : 2 Athletic U19 |
| 03.08.26 16:00 | Athletic U19 5 : 0 Villegas U-19 |
| 02.28.26 16:30 | Vasconia U-19 0 : 3 Athletic U19 |
| 02.21.26 10:00 | Athletic U19 3 : 2 Real Sociedad U19 |
| 02.14.26 15:00 | Aurrera Vitoria U-19 1 : 4 Athletic U19 |
| 02.07.26 11:30 | Osasuna U-19 0 : 2 Athletic U19 |
| 03.01.26 16:00 | Vasconia U-19 0 : 0 Athletic U19 |
Clubs | P | Pts |
1 | Athletic U19 | 8 | 21 |