| 2 |
 Josef Newgarden |
22.12.1990 |
Team Penske |
Dallara DW12 (IR18) - Chevrolet |
FI | 18 | |
| 3 |
 Scott McLaughlin |
10.06.1993 |
Team Penske |
Dallara DW12 (IR18) - Chevrolet |
FI | 18 | |
| 12 |
 Will Power |
01.03.1979 |
Team Penske |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 4 |
 Kyffin Simpson |
09.10.2004 |
Chip Ganassi Racing |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 8 |
 Linus Lundqvist |
26.03.1999 |
Chip Ganassi Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 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 | 18 | |
| 11 |
Marcus Armstrong |
29.07.2000 |
Chip Ganassi Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 5 |
 Patricio O'Ward |
06.05.1999 |
 McLaren |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 6 |
Callum Ilott |
11.11.1998 |
McLaren |
Dallara DW12 (IR18) - Chevrolet |
FI | 2 | |
| 6 |
 Théo Pourchaire |
20.08.2003 |
McLaren |
Dallara DW12 (IR18) - Chevrolet |
FI | 6 | |
| 6 |
Nolan Siegel |
08.11.2004 |
McLaren |
Dallara DW12 (IR18) - Chevrolet |
FI | 10 | |
| 7 |
Alexander Rossi |
25.09.1991 |
McLaren |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 17 |
Kyle Larson |
31.07.1992 |
McLaren |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 | |
| 06/66 |
 Helio Castroneves |
10.05.1971 |
Meyer Shank Racing |
Dallara DW12 (IR18) - Honda |
FI | 3 | |
| 60 |
Felix Rosenqvist |
07.11.1991 |
Meyer Shank Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 66 |
Tom Blomqvist |
30.11.1993 |
Meyer Shank Racing |
Dallara DW12 (IR18) - Honda |
FI | 5 | |
| 66 |
 David Malukas |
27.09.2001 |
Meyer Shank Racing |
Dallara DW12 (IR18) - Honda |
FI | 10 | |
| 14 |
Santino Ferrucci |
31.05.1998 |
A.J. Foyt Enterprises |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 41 |
Sting Ray Robb |
03.09.2001 |
A.J. Foyt Enterprises |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 15 |
Graham Rahal |
04.01.1989 |
Rahal Letterman Lanigan Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 30 |
Pietro Fittipaldi |
25.06.1996 |
Rahal Letterman Lanigan Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 45 |
 Christian Lundgaard |
23.07.2001 |
Rahal Letterman Lanigan Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 75 |
 Takuma Sato |
20.01.1977 |
Rahal Letterman Lanigan Racing |
Dallara DW12 (IR18) - Honda |
FI | 1 | |
| 75 |
 Juri Vips |
10.08.2000 |
Rahal Letterman Lanigan Racing |
Dallara DW12 (IR18) - Honda |
FI | 1 | |
| 18 |
Jack Harvey |
15.04.1993 |
Dale Coyne Racing |
Dallara DW12 (IR18) - Honda |
FI | 14 | |
| 18 |
Conor Daly |
17.12.1991 |
Dale Coyne Racing |
Dallara DW12 (IR18) - Honda |
FI | 1 | |
| 18 |
Hunter McElrea |
21.11.1999 |
Dale Coyne Racing |
Dallara DW12 (IR18) - Honda |
FI | 1 | |
| 18/51 |
Nolan Siegel |
08.11.2004 |
Dale Coyne Racing |
Dallara DW12 (IR18) - Honda |
FI | 1 | |
| 51 |
Colin Braun |
22.09.1988 |
Dale Coyne Racing |
Dallara DW12 (IR18) - Honda |
FI | 1 | |
| 51 |
 Luca Ghiotto |
24.02.1995 |
Dale Coyne Racing |
Dallara DW12 (IR18) - Honda |
FI | 4 | |
| 51 |
Katherine Legge |
12.07.1980 |
Dale Coyne Racing |
Dallara DW12 (IR18) - Honda |
FI | 7 | |
| 51 |
Tristan Vautier |
22.08.1989 |
Dale Coyne Racing |
Dallara DW12 (IR18) - Honda |
FI | 1 | |
| 51 |
Toby Sowery |
30.06.1996 |
Dale Coyne Racing |
Dallara DW12 (IR18) - Honda |
FI | 3 | |
| 20 |
Ed Carpenter |
03.03.1981 |
Ed Carpenter Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 4 | |
| 20/33 |
Christian Rasmussen |
29.06.2000 |
Ed Carpenter Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 14 | |
| 21 |
 Rinus VeeKay (Van Kalmthout) |
11.09.2000 |
Ed Carpenter Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 23 |
Ryan Hunter-Reay |
17.12.1980 |
Dreyer & Reinbold Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 | |
| 24 |
Conor Daly |
17.12.1991 |
Dreyer & Reinbold Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 | |
| 26 |
Colton Herta |
30.03.2000 |
Andretti Global |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 27 |
Kyle Kirkwood |
19.10.1998 |
Andretti Global |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 28 |
Marcus Ericsson |
02.09.1990 |
Andretti Global |
Dallara DW12 (IR18) - Honda |
FI | 17 | |
| 98 |
Marco Andretti |
13.03.1987 |
Andretti Global |
Dallara DW12 (IR18) - Honda |
FI | 1 | |
| 77 |
 Romain Grosjean |
17.04.1986 |
Juncos Hollinger Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 17 | |
| 78 |
 Agustín Canapino |
19.01.1990 |
Juncos Hollinger Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 12 | |
| 78 |
Nolan Siegel |
08.11.2004 |
Juncos Hollinger Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 | |
| 78 |
Conor Daly |
17.12.1991 |
Juncos Hollinger Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 5 | |