Season Description The 2025 NTT IndyCar Series was the 114th official championship season of American open-wheel racing and the 30th season under IndyCar Series sanction. Its showcase event was the 109th running of the Indianapolis 500, which was won by Chip Ganassi Racing driver Álex Palou for the first time. Palou also entered the season as the back-to-back defending champion and earned a three-peat. He became the first driver to win the Indianapolis 500 and season driver's title in the same year since Dario Franchitti in 2010.