| 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 |
 David Malukas |
27.09.2001 |
Team Penske |
Dallara DW12 (IR18) - Chevrolet |
FI | 18 | |
| 4 |
 Caio Collet |
03.04.2002 |
A.J. Foyt Enterprises |
Dallara DW12 (IR18) - Chevrolet |
FI | 18 | |
| 11 |
 Katherine Legge |
12.07.1980 |
A.J. Foyt Enterprises |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 | |
| 14 |
Santino Ferrucci |
31.05.1998 |
A.J. Foyt Enterprises |
Dallara DW12 (IR18) - Chevrolet |
FI | 18 | |
| 5 |
 Patricio O'Ward |
06.05.1999 |
McLaren IndyCar Team |
Dallara DW12 (IR18) - Chevrolet |
FI | 18 | |
| 6 |
Nolan Siegel |
08.11.2004 |
McLaren IndyCar Team |
Dallara DW12 (IR18) - Chevrolet |
FI | 18 | |
| 7 |
 Christian Lundgaard |
23.07.2001 |
McLaren IndyCar Team |
Dallara DW12 (IR18) - Chevrolet |
FI | 18 | |
| 31 |
Ryan Hunter-Reay |
17.12.1980 |
McLaren IndyCar Team |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 | |
| 06 |
Helio Castroneves |
10.05.1971 |
Meyer Shank Racing |
Dallara DW12 (IR18) - Honda |
FI | 1 | |
| 60 |
 Felix Rosenqvist |
07.11.1991 |
Meyer Shank Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 66 |
Marcus Armstrong |
29.07.2000 |
Meyer Shank Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 8 |
 Kyffin Simpson |
09.10.2004 |
Chip Ganassi Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 9 |
Scott Dixon |
22.07.1980 |
Chip Ganassi Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 10 |
 Alex Palou |
01.04.1997 |
Chip Ganassi Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 15 |
Graham Rahal |
04.01.1989 |
Rahal Letterman Lanigan Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 45 |
Louis Foster |
27.07.2003 |
Rahal Letterman Lanigan Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 47 |
 Mick Schumacher |
22.03.1999 |
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 | |
| 18 |
  Romain Grosjean |
17.04.1986 |
Dale Coyne Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 19 |
 Dennis Hauger |
17.03.2003 |
Dale Coyne Racing |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 20 |
Alexander Rossi |
25.09.1991 |
Ed Carpenter Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 18 | |
| 21 |
Christian Rasmussen |
29.06.2000 |
Ed Carpenter Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 18 | |
| 33 |
Ed Carpenter |
03.03.1981 |
Ed Carpenter Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 | |
| 23 |
Conor Daly |
17.12.1991 |
Dreyer & Reinbold Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 | |
| 24 |
Jack Harvey |
15.04.1993 |
Dreyer & Reinbold Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 | |
| 26 |
 Will Power |
01.03.1979 |
Andretti Global |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 27 |
Kyle Kirkwood |
19.10.1998 |
Andretti Global |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 28 |
Marcus Ericsson |
02.09.1990 |
Andretti Global |
Dallara DW12 (IR18) - Honda |
FI | 18 | |
| 51 |
Jacob Abel |
09.03.2001 |
Abel Motorsports |
Dallara DW12 (IR18) - Chevrolet |
FI | 1 | |
| 76 |
 Rinus VeeKay (Van Kalmthout) |
11.09.2000 |
Juncos Hollinger Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 18 | |
| 77 |
Sting Ray Robb |
03.09.2001 |
Juncos Hollinger Racing |
Dallara DW12 (IR18) - Chevrolet |
FI | 18 | |