| 1 |
 Tony Kanaan |
31.12.1974 |
 Chip Ganassi Racing |
Dallara DW12 (IR18) - Honda |
FI | 1 | |
| 8 |
 Marcus Ericsson |
02.09.1990 |
Chip Ganassi Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 9 |
 Scott Dixon |
22.07.1980 |
Chip Ganassi Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 10 |
 Alex Palou |
01.04.1997 |
Chip Ganassi Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 48 |
Jimmie Johnson |
17.09.1975 |
Chip Ganassi Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 2 |
Josef Newgarden |
22.12.1990 |
Team Penske |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 3 |
Scott McLaughlin |
10.06.1993 |
Team Penske |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 12 |
 Will Power |
01.03.1979 |
Team Penske |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 4 |
 Dalton Kellett |
19.08.1993 |
A.J. Foyt Enterprises |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 11 |
 Tatiana Calderon |
10.03.1993 |
A.J. Foyt Enterprises |
Dallara DW12 (IR18) - Chevrolet |
FI | 7 | |
| 11 |
J.R. Hildebrand |
03.01.1988 |
A.J. Foyt Enterprises |
Dallara DW12 (IR18) - Chevrolet |
FI | 2 | |
| 14 |
Kyle Kirkwood |
19.10.1998 |
A.J. Foyt Enterprises |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 5 |
 Patricio O'Ward |
06.05.1999 |
McLaren SP |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 6 |
Juan Pablo Montoya |
20.09.1975 |
McLaren SP |
Dallara DW12 (IR18) - Chevrolet |
FI | 2 | |
| 7 |
Felix Rosenqvist |
07.11.1991 |
McLaren SP |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 06 |
Helio Castroneves |
10.05.1971 |
Meyer Shank Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 60 |
 Simon Pagenaud |
18.05.1984 |
Meyer Shank Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 15 |
Graham Rahal |
04.01.1989 |
Rahal Letterman Lanigan Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 30 |
 Christian Lundgaard |
23.07.2001 |
Rahal Letterman Lanigan Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 45 |
 Jack Harvey |
15.04.1993 |
Rahal Letterman Lanigan Racing |
Dallara DW12 (IR18) - Honda |
FI | 16 | |
| 45 |
Santino Ferrucci |
31.05.1998 |
Rahal Letterman Lanigan Racing |
Dallara DW12 (IR18) - Honda |
FI | 1 | |
| 16 |
 Simona de Silvestro |
01.09.1988 |
Paretta Autosport |
Dallara DW12 (IR18) - Chevrolet |
FI | 4 | |
| 18 |
 David Malukas |
27.09.2001 |
Dale Coyne Racing (Dale Coyne with HMD Motorsports) |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 51 |
 Takuma Sato |
20.01.1977 |
Dale Coyne Racing (Dale Coyne with Rick Ware Racing) |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 20 |
Conor Daly |
17.12.1991 |
Ed Carpenter Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 21 |
 Rinus VeeKay (Van Kalmthout) |
11.09.2000 |
Ed Carpenter Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 33 |
Ed Carpenter |
03.03.1981 |
Ed Carpenter Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 5 | |
| 23 |
Santino Ferrucci |
31.05.1998 |
Dreyer & Reinbold Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 | |
| 24 |
Sage Karam |
03.05.1995 |
Dreyer & Reinbold Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 | |
| 25 |
Stefan Wilson |
20.09.1989 |
DragonSpeed (Cusick Motorsports) |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 | |
| 26 |
Colton Herta |
30.03.2000 |
Andretti Autosport |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 27 |
Alexander Rossi |
25.09.1991 |
Andretti Autosport |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 28 |
Romain Grosjean |
17.04.1986 |
Andretti Autosport |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 29 |
 Devlin DeFrancesco |
17.01.2000 |
Andretti Autosport (Andretti Steinbrenner Autosport) |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 98 |
Marco Andretti |
13.03.1987 |
Andretti Autosport (Andretti Herta Autosport) |
Dallara DW12 (IR18) - Honda |
FI | 1 | |
| 77 |
Callum Ilott |
11.11.1998 |
Juncos Hollinger Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 16 | |
| 77 |
Santino Ferrucci |
31.05.1998 |
Juncos Hollinger Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 | |