| August 2025Aug 17 |  LaLiga | Athletic Club 3–2 SevillaRegular Season - 1 | W |
| Aug 25 | LaLiga | Athletic Club1–0 Rayo VallecanoRegular Season - 2 | W |
| Aug 31 | LaLiga | Real Betis 1–2Athletic ClubRegular Season - 3 | W |
| September 2025Sep 13 | LaLiga | Athletic Club0–1 AlavesRegular Season - 4 | L |
| Sep 16 |  Champions League | Athletic Club0–2 ArsenalLeague Stage - 1 | L |
| Sep 20 | LaLiga | Valencia 2–0Athletic ClubRegular Season - 5 | L |
| Sep 23 | LaLiga | Athletic Club1–1 GironaRegular Season - 6 | D |
| Sep 27 | LaLiga | Villarreal 1–0Athletic ClubRegular Season - 7 | L |
| October 2025Oct 01 | Champions League | Borussia Dortmund 4–1Athletic ClubLeague Stage - 2 | L |
| Oct 04 | LaLiga | Athletic Club2–1 MallorcaRegular Season - 8 | W |
| Oct 19 | LaLiga | Elche 0–0Athletic ClubRegular Season - 9 | D |
| Oct 22 | Champions League | Athletic Club3–1 QarabagLeague Stage - 3 | W |
| Oct 25 | LaLiga | Athletic Club0–1 GetafeRegular Season - 10 | L |
| November 2025Nov 01 | LaLiga | Real Sociedad 3–2Athletic ClubRegular Season - 11 | L |
| Nov 05 | Champions League | Newcastle 2–0Athletic ClubLeague Stage - 4 | L |
| Nov 09 | LaLiga | Athletic Club1–0 OviedoRegular Season - 12 | W |
| Nov 22 | LaLiga | Barcelona 4–0Athletic ClubRegular Season - 13 | L |
| Nov 25 | Champions League | Slavia Praha 0–0Athletic ClubLeague Stage - 5 | D |
| Nov 29 | LaLiga | Levante 0–2Athletic ClubRegular Season - 14 | W |
| December 2025Dec 03 | LaLiga | Athletic Club0–3 Real MadridRegular Season - 19 | L |
| Dec 06 | LaLiga | Athletic Club1–0 Atletico MadridRegular Season - 15 | W |
| Dec 10 | Champions League | Athletic Club0–0 Paris Saint GermainLeague Stage - 6 | D |
| Dec 14 | LaLiga | Celta Vigo 2–0Athletic ClubRegular Season - 16 | L |
| Dec 18 |  Copa del Rey | Ourense CF 0–1Athletic ClubRound of 32 | W |
| Dec 22 | LaLiga | Athletic Club1–2 EspanyolRegular Season - 17 | L |
| January 2026Jan 03 | LaLiga | Osasuna 1–1Athletic ClubRegular Season - 18 | D |
| Jan 07 |  Supercopa de España | Barcelona5–0Athletic ClubSemi-finals | L |
| Jan 13 | Copa del Rey | Cultural Leonesa 3–4Athletic ClubRound of 16 | W |
| Jan 17 | LaLiga | Mallorca3–2Athletic ClubRegular Season - 20 | L |
| Jan 21 | Champions League | Atalanta 2–3Athletic ClubLeague Stage - 7 | W |
| Jan 24 | LaLiga | Sevilla2–1Athletic ClubRegular Season - 21 | L |
| Jan 28 | Champions League | Athletic Club2–3 Sporting CPLeague Stage - 8 | L |
| February 2026Feb 01 | LaLiga | Athletic Club1–1Real SociedadRegular Season - 22 | D |
| Feb 04 | Copa del Rey | Valencia1–2Athletic ClubQuarter-finals | W |
| Feb 08 | LaLiga | Athletic Club4–2LevanteRegular Season - 23 | W |
| Feb 11 | Copa del Rey | Athletic Club0–1Real SociedadSemi-finals | L |
| Feb 15 | LaLiga | Oviedo1–2Athletic ClubRegular Season - 24 | W |
| Feb 20 | LaLiga | Athletic Club2–1ElcheRegular Season - 25 | W |
| Feb 28 | LaLiga | Rayo Vallecano1–1Athletic ClubRegular Season - 26 | D |
| March 2026Mar 04 | Copa del Rey | Real Sociedad1–0Athletic ClubSemi-finals | L |
| Mar 07 | LaLiga | Athletic Club0–1BarcelonaRegular Season - 27 | L |
| Mar 14 | LaLiga | Girona3–0Athletic ClubRegular Season - 28 | L |
| Mar 22 | LaLiga | Athletic Club2–1Real BetisRegular Season - 29 | W |
| April 2026Apr 05 | LaLiga | Getafe2–0Athletic ClubRegular Season - 30 | L |
| Apr 12 | LaLiga | Athletic Club1–2VillarrealRegular Season - 31 | L |
| Apr 21 | LaLiga | Athletic Club1–0OsasunaRegular Season - 33 | W |
| Apr 25 | LaLiga | Atletico Madrid3–2Athletic ClubRegular Season - 32 | L |
| May 2026May 02 | LaLiga | Alaves2–4Athletic ClubRegular Season - 34 | W |
| May 10 | LaLiga | Athletic Club0–1ValenciaRegular Season - 35 | L |
| May 13 | LaLiga | Espanyol2–0Athletic ClubRegular Season - 36 | L |
| May 17 | LaLiga | Athletic Club1–1Celta VigoRegular Season - 37 | D |
| May 23 | LaLiga | Real Madrid4–2Athletic ClubRegular Season - 38 | L |
