Atlético Madrid's 2025-26 season marked their 123rd in club history and their 24th consecutive campaign in La Liga, with the club competing across four fronts: the domestic league, the Copa del Rey, the Supercopa de España, and the UEFA Champions League. The club made a significant financial commitment in the transfer market, spending a total of €241 million on new players while recouping €126.5 million through departures. In the Champions League, the league phase draw was held on 28 August 2025, followed by the knockout phase play-off draw on 30 January 2026, and the round of 16, quarter-final, and semi-final draws all took place on 27 February 2026. Atlético entered the Copa del Rey directly in the round of 32 thanks to their qualification for the 2026 Supercopa de España, which also forced their La Liga matchday 19 fixture against Barcelona to be moved to an earlier date. The squad was finalized as of 2 May 2026, with statistics and goalscorers tracked throughout the season, though the article primarily outlines competition structures and scheduling rather than final match results.