After initially returning to the Indianapolis 500 in 2017 as a partner to Andretti Autosport to run Fernando Alonso, McLaren announced in August 2019 that they would run in conjunction with Arrow Schmidt Peterson Motorsports starting in 2020 to run the full IndyCar Series, the combined entry being named Arrow McLaren SP. Initially having no ownership interest in the team, McLaren would purchase 75% of the operation in 2021.