A.J. Foyt Enterprises
Dalton Kellett
Kyle Kirkwood
Tatiana Calderon (GP 1, 3-5, 7-9) JR Hildebrand (GP 2, 6) Andretti Autosport Colton Herta
Alexander Rossi
Romain Grosjean
Devlin DeFrancesco
Arrow McLaren SP
Patricio O'Ward
Felix Rosenqvist
Juan Pablo Montoya
(GPs 5-6)
Chip Ganassi Racing Marcus Ericsson
Scott Dixon
Alex Palou
Jimmie Johnson
Tony Kanaan
(GP 6)
Dale Coyne Racing David Malukas
Takuma Sato
Ed Carpenter Racing Conor Daly
Rinus VeeKay
Ed Carpenter (GP 2, 6, 11-12, 15) Juncos Hollinger Racing
Callum Ilott (GPs 1-6, 8-17) Santino Ferrucci (GP 7) Meyer Shank Racing Helio Castroneves
Simon Pagenaud
Rahal Letterman Lanigan Racing Graham Rahal
Christian Lundgaard
Jack Harvey (GP 1, 3-17) Santino Ferrucci (GP 2) Team Penske Josef Newgarden
Scott McLaughlin
Will Power
Andretti Herta Autosport Marco Andretti
(GP 6)
DragonSpeed Stefan Wilson
(GP 6)
Dreyer & Reinbold Racing Santino Ferrucci
(GP 6)
Sage Karam
(GP 6)
Paretta Autosport
Simona De Silvestro (GPs 8-9, 14, 17)