Our team fuels four iconic motorsports brands: Indianapolis Motor Speedway (IMS) - home of the world's largest spectator sporting facility and annually hosts the world's most prestigious auto race: the Indianapolis 500 presented by Gainbridge. INDYCAR - The Indianapolis-based governing body for North America's premier open-wheel auto racing series, the NTT INDYCAR SERIES, and its developmental series, INDY NXT by Firestone.