| August 2025Aug 19 |  LaLiga | Real Madrid 1–0 OsasunaRegular Season - 1 | L |
| Aug 24 | LaLiga | Osasuna1–0 ValenciaRegular Season - 2 | W |
| Aug 31 | LaLiga | Espanyol 1–0OsasunaRegular Season - 3 | L |
| September 2025Sep 14 | LaLiga | Osasuna2–0 Rayo VallecanoRegular Season - 4 | W |
| Sep 20 | LaLiga | Villarreal 2–1OsasunaRegular Season - 5 | L |
| Sep 25 | LaLiga | Osasuna1–1 ElcheRegular Season - 6 | D |
| Sep 28 | LaLiga | Real Betis 2–0OsasunaRegular Season - 7 | L |
| October 2025Oct 03 | LaLiga | Osasuna2–1 GetafeRegular Season - 8 | W |
| Oct 18 | LaLiga | Atletico Madrid 1–0OsasunaRegular Season - 9 | L |
| Oct 26 | LaLiga | Osasuna2–3 Celta VigoRegular Season - 10 | L |
| Oct 29 |  Copa del Rey | CD Sant Jordi 0–5OsasunaRound of 128 | W |
| November 2025Nov 03 | LaLiga | Oviedo 0–0OsasunaRegular Season - 11 | D |
| Nov 08 | LaLiga | Sevilla 1–0OsasunaRegular Season - 12 | L |
| Nov 22 | LaLiga | Osasuna1–3 Real SociedadRegular Season - 13 | L |
| Nov 29 | LaLiga | Mallorca 2–2OsasunaRegular Season - 14 | D |
| December 2025Dec 02 | Copa del Rey | Ebro 3–5OsasunaRound of 64 | W |
| Dec 08 | LaLiga | Osasuna2–0 LevanteRegular Season - 15 | W |
| Dec 13 | LaLiga | Barcelona 2–0OsasunaRegular Season - 16 | L |
| Dec 17 | Copa del Rey | Huesca 2–4OsasunaRound of 32 | W |
| Dec 20 | LaLiga | Osasuna3–0 AlavesRegular Season - 17 | W |
| January 2026Jan 03 | LaLiga | Osasuna1–1 Athletic ClubRegular Season - 18 | D |
| Jan 10 | LaLiga | Girona 1–0OsasunaRegular Season - 19 | L |
| Jan 13 | Copa del Rey | Real Sociedad2–2OsasunaRound of 16 | D |
| Jan 17 | LaLiga | Osasuna3–2OviedoRegular Season - 20 | W |
| Jan 24 | LaLiga | Rayo Vallecano1–3OsasunaRegular Season - 21 | W |
| Jan 31 | LaLiga | Osasuna2–2VillarrealRegular Season - 22 | D |
| February 2026Feb 06 | LaLiga | Celta Vigo1–2OsasunaRegular Season - 23 | W |
| Feb 13 | LaLiga | Elche0–0OsasunaRegular Season - 24 | D |
| Feb 21 | LaLiga | Osasuna2–1Real MadridRegular Season - 25 | W |
| March 2026Mar 01 | LaLiga | Valencia1–0OsasunaRegular Season - 26 | L |
| Mar 07 | LaLiga | Osasuna2–2MallorcaRegular Season - 27 | D |
| Mar 15 | LaLiga | Real Sociedad3–1OsasunaRegular Season - 28 | L |
| Mar 21 | LaLiga | Osasuna1–0GironaRegular Season - 29 | W |
| April 2026Apr 05 | LaLiga | Alaves2–2OsasunaRegular Season - 30 | D |
| Apr 12 | LaLiga | Osasuna1–1Real BetisRegular Season - 31 | D |
| Apr 21 | LaLiga | Athletic Club1–0OsasunaRegular Season - 33 | L |
| Apr 26 | LaLiga | Osasuna2–1SevillaRegular Season - 32 | W |
| May 2026May 02 | LaLiga | Osasuna1–2BarcelonaRegular Season - 34 | L |
| May 08 | LaLiga | Levante3–2OsasunaRegular Season - 35 | L |
| May 12 | LaLiga | Osasuna1–2Atletico MadridRegular Season - 36 | L |
| May 17 | LaLiga | Osasuna1–2EspanyolRegular Season - 37 | L |
| May 23 | LaLiga | Getafe1–0OsasunaRegular Season - 38 | L |
